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tocCollapsibleButton_a_s8">On this page<!-- --></button></div><div class="theme-doc-markdown markdown"><h1>Database</h1>
<!-- --><div class="theme-admonition theme-admonition-note admonition_inHR alert alert--secondary"><div class="admonitionHeading_piGE"><span class="admonitionIcon_ROqA"><svg viewBox="0 0 14 16"><path fill-rule="evenodd" d="M6.3 5.69a.942.942 0 0 1-.28-.7c0-.28.09-.52.28-.7.19-.18.42-.28.7-.28.28 0 .52.09.7.28.18.19.28.42.28.7 0 .28-.09.52-.28.7a1 1 0 0 1-.7.3c-.28 0-.52-.11-.7-.3zM8 7.99c-.02-.25-.11-.48-.31-.69-.2-.19-.42-.3-.69-.31H6c-.27.02-.48.13-.69.31-.2.2-.3.44-.31.69h1v3c.02.27.11.5.31.69.2.2.42.31.69.31h1c.27 0 .48-.11.69-.31.2-.19.3-.42.31-.69H8V7.98v.01zM7 2.3c-3.14 0-5.7 2.54-5.7 5.68 0 3.14 2.56 5.7 5.7 5.7s5.7-2.55 5.7-5.7c0-3.15-2.56-5.69-5.7-5.69v.01zM7 .98c3.86 0 7 3.14 7 7s-3.14 7-7 7-7-3.12-7-7 3.14-7 7-7z"></path></svg></span>note<!-- --></div><div class="admonitionContent_BA39"><p>Different databases have different data types. The following table presumes use of mysql/mariadb as an example.</p></div></div>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="activity">activity<!-- --><a href="#activity" class="hash-link" aria-label="Direct link to activity" title="Direct link to activity"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>activity</code> table records various actions of users, such as votes, etc.<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>bigint(20)</td><td>NO</td><td>PRI</td><td></td><td>activity id</td></tr><tr><td>created_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>create time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>update time</td></tr><tr><td>cancelled_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>cancelled time</td></tr><tr><td>user_id</td><td>bigint(20)</td><td>NO</td><td>MUL</td><td></td><td>the user ID that generated the activity or affected by the activity</td></tr><tr><td>trigger_user_id</td><td>bigint(20)</td><td>NO</td><td>MUL</td><td>0</td><td>the trigger user ID that generated the activity or affected by the activity</td></tr><tr><td>object_id</td><td>bigint(20)</td><td>NO</td><td>MUL</td><td>0</td><td>the object ID that affected by the activity</td></tr><tr><td>original_object_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>the original object ID that activity</td></tr><tr><td>activity_type</td><td>int(11)</td><td>NO</td><td></td><td></td><td>activity type, correspond to config id</td></tr><tr><td>cancelled</td><td>tinyint(4)</td><td>NO</td><td></td><td>0</td><td>mark this activity if cancelled</td></tr><tr><td>rank</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>rank of current operating user affected</td></tr><tr><td>has_rank</td><td>tinyint(4)</td><td>NO</td><td></td><td>0</td><td>this activity has rank or not</td></tr><tr><td>revision_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>revision id</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="answer">answer<!-- --><a href="#answer" class="hash-link" aria-label="Direct link to answer" title="Direct link to answer"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>answer</code> table records the answer info.<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>bigint(20)</td><td>NO</td><td>PRI</td><td></td><td>answer id</td></tr><tr><td>created_at</td><td>timestamp</td><td>NO</td><td></td><td>CURRENT_TIMESTAMP</td><td>create time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>update time</td></tr><tr><td>question_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>question id</td></tr><tr><td>user_id</td><td>bigint(20)</td><td>NO</td><td>MUL</td><td>0</td><td>answer user id</td></tr><tr><td>last_edit_user_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>last edit user id</td></tr><tr><td>original_text</td><td>mediumtext</td><td>NO</td><td></td><td></td><td>original text</td></tr><tr><td>parsed_text</td><td>mediumtext</td><td>NO</td><td></td><td></td><td>parsed text</td></tr><tr><td>status</td><td>int(11)</td><td>NO</td><td></td><td>1</td><td>answer status(available: 1;deleted: 10)</td></tr><tr><td>adopted</td><td>int(11)</td><td>NO</td><td></td><td>1</td><td>adopted (1 failed 2 adopted)</td></tr><tr><td>comment_count</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>comment count</td></tr><tr><td>vote_count</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>vote count</td></tr><tr><td>revision_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>revision id</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="collection">collection<!-- --><a href="#collection" class="hash-link" aria-label="Direct link to collection" title="Direct link to collection"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>collection</code> table records user collection about any object.<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>bigint(20)</td><td>NO</td><td>PRI</td><td>0</td><td>collection id</td></tr><tr><td>created_at</td><td>timestamp</td><td>NO</td><td></td><td>CURRENT_TIMESTAMP</td><td>created time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>NO</td><td></td><td>CURRENT_TIMESTAMP</td><td>updated time</td></tr><tr><td>user_id</td><td>bigint(20)</td><td>NO</td><td>MUL</td><td>0</td><td>user id</td></tr><tr><td>object_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>object id</td></tr><tr><td>user_collection_group_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>user collection group id</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="collection_group">collection_group<!-- --><a href="#collection_group" class="hash-link" aria-label="Direct link to collection_group" title="Direct link to collection_group"></a></h2>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>bigint(20)</td><td>NO</td><td>PRI</td><td></td><td>id</td></tr><tr><td>created_at</td><td>timestamp</td><td>NO</td><td></td><td>CURRENT_TIMESTAMP</td><td>created time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>NO</td><td></td><td>CURRENT_TIMESTAMP</td><td>updated time</td></tr><tr><td>user_id</td><td>bigint(20)</td><td>NO</td><td>MUL</td><td>0</td><td>user id</td></tr><tr><td>name</td><td>varchar(50)</td><td>NO</td><td></td><td></td><td>the collection group name</td></tr><tr><td>default_group</td><td>int(11)</td><td>NO</td><td></td><td>1</td><td>mark this group is default, default 1</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="comment">comment<!-- --><a href="#comment" class="hash-link" aria-label="Direct link to comment" title="Direct link to comment"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>comment</code> table records the comment about question or answer.<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>bigint(20)</td><td>NO</td><td>PRI</td><td></td><td>comment id</td></tr><tr><td>created_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>create time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>update time</td></tr><tr><td>user_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>user id</td></tr><tr><td>reply_user_id</td><td>bigint(20)</td><td>YES</td><td></td><td></td><td>reply user id</td></tr><tr><td>reply_comment_id</td><td>bigint(20)</td><td>YES</td><td></td><td></td><td>reply comment id</td></tr><tr><td>object_id</td><td>bigint(20)</td><td>NO</td><td>MUL</td><td>0</td><td>object id</td></tr><tr><td>question_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>question id</td></tr><tr><td>vote_count</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>user vote amount</td></tr><tr><td>status</td><td>tinyint(4)</td><td>NO</td><td></td><td>0</td><td>comment status(available: 1;deleted: 10)</td></tr><tr><td>original_text</td><td>mediumtext</td><td>NO</td><td></td><td></td><td>original comment content</td></tr><tr><td>parsed_text</td><td>mediumtext</td><td>NO</td><td></td><td></td><td>parsed comment content</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="config">config<!-- --><a href="#config" class="hash-link" aria-label="Direct link to config" title="Direct link to config"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>config</code> records the site configuration.<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>int(11)</td><td>NO</td><td>PRI</td><td></td><td>config id</td></tr><tr><td>key</td><td>varchar(128)</td><td>YES</td><td>UNI</td><td></td><td>the config key</td></tr><tr><td>value</td><td>text</td><td>YES</td><td></td><td></td><td>the config value, custom data structures and types</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="meta">meta<!-- --><a href="#meta" class="hash-link" aria-label="Direct link to meta" title="Direct link to meta"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>meta</code> records some extra information about the object.<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>int(10)</td><td>NO</td><td>PRI</td><td></td><td>id</td></tr><tr><td>created_at</td><td>timestamp</td><td>NO</td><td></td><td>CURRENT_TIMESTAMP</td><td>created time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>NO</td><td></td><td>CURRENT_TIMESTAMP</td><td>updated time</td></tr><tr><td>object_id</td><td>bigint(20)</td><td>NO</td><td>MUL</td><td>0</td><td>object id</td></tr><tr><td>key</td><td>varchar(100)</td><td>NO</td><td></td><td></td><td>key</td></tr><tr><td>value</td><td>mediumtext</td><td>NO</td><td></td><td></td><td>value</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="notification">notification<!-- --><a href="#notification" class="hash-link" aria-label="Direct link to notification" title="Direct link to notification"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>notification</code> table records the notification that user received.<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>bigint(20)</td><td>NO</td><td>PRI</td><td></td><td>notification id</td></tr><tr><td>created_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>create time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>update time</td></tr><tr><td>user_id</td><td>bigint(20)</td><td>NO</td><td>MUL</td><td>0</td><td>user id</td></tr><tr><td>object_id</td><td>bigint(20)</td><td>NO</td><td>MUL</td><td>0</td><td>object id</td></tr><tr><td>content</td><td>text</td><td>NO</td><td></td><td></td><td>notification content</td></tr><tr><td>type</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>notification type(1<!-- -->:inbox<!-- -->; 2<!-- -->:achievement<!-- -->)<!-- --></td></tr><tr><td>is_read</td><td>int(11)</td><td>NO</td><td></td><td>1</td><td>read status(unread: 1; read 2)</td></tr><tr><td>status</td><td>int(11)</td><td>NO</td><td></td><td>1</td><td>notification status(normal: 1;delete 2)</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="power">power<!-- --><a href="#power" class="hash-link" aria-label="Direct link to power" title="Direct link to power"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>power</code> table records all permissions<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>int(11)</td><td>NO</td><td>PRI</td><td></td><td></td></tr><tr><td>created_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>create time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>update time</td></tr><tr><td>name</td><td>varchar(50)</td><td>NO</td><td></td><td></td><td>name</td></tr><tr><td>power_type</td><td>varchar(100)</td><td>NO</td><td></td><td></td><td>power type</td></tr><tr><td>description</td><td>varchar(200)</td><td>NO</td><td></td><td></td><td>description</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="question">question<!-- --><a href="#question" class="hash-link" aria-label="Direct link to question" title="Direct link to question"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>question</code> table records the question info.<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>bigint(20)</td><td>NO</td><td>PRI</td><td></td><td>question id</td></tr><tr><td>created_at</td><td>timestamp</td><td>NO</td><td></td><td>CURRENT_TIMESTAMP</td><td>create time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>NO</td><td></td><td>CURRENT_TIMESTAMP</td><td>update time</td></tr><tr><td>user_id</td><td>bigint(20)</td><td>NO</td><td>MUL</td><td>0</td><td>user id</td></tr><tr><td>last_edit_user_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>last edit user id</td></tr><tr><td>title</td><td>varchar(150)</td><td>NO</td><td></td><td></td><td>question title</td></tr><tr><td>original_text</td><td>mediumtext</td><td>NO</td><td></td><td></td><td>original text</td></tr><tr><td>parsed_text</td><td>mediumtext</td><td>NO</td><td></td><td></td><td>parsed text</td></tr><tr><td>status</td><td>int(11)</td><td>NO</td><td></td><td>1</td><td>question status(available: 1;deleted: 10)</td></tr><tr><td>view_count</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>view count</td></tr><tr><td>unique_view_count</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>unique view count</td></tr><tr><td>vote_count</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>vote count</td></tr><tr><td>answer_count</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>answer count</td></tr><tr><td>collection_count</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>collection count</td></tr><tr><td>follow_count</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>follow count</td></tr><tr><td>accepted_answer_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>accepted answer id</td></tr><tr><td>last_answer_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>last answer id</td></tr><tr><td>post_update_time</td><td>timestamp</td><td>YES</td><td></td><td>CURRENT_TIMESTAMP</td><td>answer the last update time</td></tr><tr><td>revision_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>revision id</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="report">report<!-- --><a href="#report" class="hash-link" aria-label="Direct link to report" title="Direct link to report"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>report</code> table records the content of user reports<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>bigint(20)</td><td>NO</td><td>PRI</td><td></td><td>id</td></tr><tr><td>created_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>create time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>update time</td></tr><tr><td>user_id</td><td>bigint(20)</td><td>NO</td><td></td><td></td><td>reporter user id</td></tr><tr><td>object_id</td><td>bigint(20)</td><td>NO</td><td></td><td></td><td>object id</td></tr><tr><td>reported_user_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>reported user id</td></tr><tr><td>object_type</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>revision type</td></tr><tr><td>report_type</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>report type</td></tr><tr><td>content</td><td>text</td><td>NO</td><td></td><td></td><td>report content</td></tr><tr><td>flagged_type</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>flagged type</td></tr><tr><td>flagged_content</td><td>text</td><td>YES</td><td></td><td></td><td>flagged content</td></tr><tr><td>status</td><td>int(11)</td><td>NO</td><td></td><td>1</td><td>status(normal: 1; pending:2; delete: 10)</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="revision">revision<!-- --><a href="#revision" class="hash-link" aria-label="Direct link to revision" title="Direct link to revision"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>revision</code> table records the object revision and the content of the version.<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>bigint(20)</td><td>NO</td><td>PRI</td><td></td><td>id</td></tr><tr><td>created_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>create time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>update time</td></tr><tr><td>user_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>user id</td></tr><tr><td>object_type</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>revision type(question: 1; answer 2; tag 3)</td></tr><tr><td>object_id</td><td>bigint(20)</td><td>NO</td><td>MUL</td><td>0</td><td>object id</td></tr><tr><td>title</td><td>varchar(255)</td><td>NO</td><td></td><td></td><td>title</td></tr><tr><td>content</td><td>text</td><td>NO</td><td></td><td></td><td>content</td></tr><tr><td>log</td><td>varchar(255)</td><td>YES</td><td></td><td></td><td>log</td></tr><tr><td>status</td><td>int(11)</td><td>NO</td><td></td><td>1</td><td>revision status(normal: 1; delete 2)</td></tr><tr><td>review_user_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>review user id</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="role">role<!-- --><a href="#role" class="hash-link" aria-label="Direct link to role" title="Direct link to role"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>role</code> table records all roles<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>int(11)</td><td>NO</td><td>PRI</td><td></td><td></td></tr><tr><td>created_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>create time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>update time</td></tr><tr><td>name</td><td>varchar(50)</td><td>NO</td><td></td><td></td><td>name</td></tr><tr><td>description</td><td>varchar(200)</td><td>NO</td><td></td><td></td><td>description</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="role_power_rel">role_power_rel<!-- --><a href="#role_power_rel" class="hash-link" aria-label="Direct link to role_power_rel" title="Direct link to role_power_rel"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>role_power_rel</code> records the relationship between roles and powers<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>int(11)</td><td>NO</td><td>PRI</td><td></td><td></td></tr><tr><td>created_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>create time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>update time</td></tr><tr><td>role_id</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>role id</td></tr><tr><td>power_type</td><td>varchar(200)</td><td>NO</td><td></td><td></td><td>power</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="site_info">site_info<!-- --><a href="#site_info" class="hash-link" aria-label="Direct link to site_info" title="Direct link to site_info"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>site_info</code> table records the site information about interface or something related<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>int(11)</td><td>NO</td><td>PRI</td><td></td><td>id</td></tr><tr><td>created_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>create time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>update time</td></tr><tr><td>type</td><td>varchar(64)</td><td>NO</td><td></td><td></td><td>type</td></tr><tr><td>content</td><td>mediumtext</td><td>NO</td><td></td><td></td><td>content</td></tr><tr><td>status</td><td>int(11)</td><td>NO</td><td></td><td>1</td><td>site info status(available: 1;deleted: 10)</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="tag">tag<!-- --><a href="#tag" class="hash-link" aria-label="Direct link to tag" title="Direct link to tag"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>tag</code> table records the tag information.<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>bigint(20)</td><td>NO</td><td>PRI</td><td></td><td>tag_id</td></tr><tr><td>created_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>create time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>update time</td></tr><tr><td>main_tag_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>main tag id</td></tr><tr><td>main_tag_slug_name</td><td>varchar(35)</td><td>NO</td><td></td><td></td><td>main tag slug name</td></tr><tr><td>slug_name</td><td>varchar(35)</td><td>NO</td><td>UNI</td><td></td><td>slug name</td></tr><tr><td>display_name</td><td>varchar(35)</td><td>NO</td><td></td><td></td><td>display name</td></tr><tr><td>original_text</td><td>mediumtext</td><td>NO</td><td></td><td></td><td>original comment content</td></tr><tr><td>parsed_text</td><td>mediumtext</td><td>NO</td><td></td><td></td><td>parsed comment content</td></tr><tr><td>follow_count</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>associated follow count</td></tr><tr><td>question_count</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>associated question count</td></tr><tr><td>status</td><td>int(11)</td><td>NO</td><td></td><td>1</td><td>tag status(available: 1;deleted: 10)</td></tr><tr><td>revision_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>revision id</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="tag_rel">tag_rel<!-- --><a href="#tag_rel" class="hash-link" aria-label="Direct link to tag_rel" title="Direct link to tag_rel"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>tag_rel</code> table records the relationship between objects and tags<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>bigint(20)</td><td>NO</td><td>PRI</td><td></td><td>tag_list_id</td></tr><tr><td>created_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>create time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>update time</td></tr><tr><td>object_id</td><td>bigint(20)</td><td>NO</td><td>MUL</td><td></td><td>object_id</td></tr><tr><td>tag_id</td><td>bigint(20)</td><td>NO</td><td>MUL</td><td></td><td>tag_id</td></tr><tr><td>status</td><td>int(11)</td><td>NO</td><td></td><td>1</td><td>tag_list_status(available: 1;deleted: 10)</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="uniqid">uniqid<!-- --><a href="#uniqid" class="hash-link" aria-label="Direct link to uniqid" title="Direct link to uniqid"></a></h2>
<!-- --><blockquote>
<!-- --><p><code>uniqid</code> table recorded the object_id that can uniquely identify an object.<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>bigint(20)</td><td>NO</td><td>PRI</td><td></td><td>uniqid_id</td></tr><tr><td>uniqid_type</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>uniqid_type</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="user">user<!-- --><a href="#user" class="hash-link" aria-label="Direct link to user" title="Direct link to user"></a></h2>
<!-- --><blockquote>
<!-- --><p>The user table recorded basic information about the user.</p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>bigint(20)</td><td>NO</td><td>PRI</td><td></td><td>user id</td></tr><tr><td>created_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>create time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>update time</td></tr><tr><td>suspended_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>suspended time</td></tr><tr><td>deleted_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>delete time</td></tr><tr><td>last_login_date</td><td>timestamp</td><td>YES</td><td></td><td></td><td>last login date</td></tr><tr><td>username</td><td>varchar(50)</td><td>NO</td><td>UNI</td><td></td><td>username</td></tr><tr><td>pass</td><td>varchar(255)</td><td>NO</td><td></td><td></td><td>password</td></tr><tr><td>e_mail</td><td>varchar(100)</td><td>NO</td><td></td><td></td><td>email</td></tr><tr><td>mail_status</td><td>tinyint(4)</td><td>NO</td><td></td><td>2</td><td>mail status(1 pass 2 to be verified)</td></tr><tr><td>notice_status</td><td>int(11)</td><td>NO</td><td></td><td>2</td><td>notice status(1 on 2off)</td></tr><tr><td>follow_count</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>follow count</td></tr><tr><td>answer_count</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>answer count</td></tr><tr><td>question_count</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>question count</td></tr><tr><td>rank</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>rank</td></tr><tr><td>status</td><td>int(11)</td><td>NO</td><td></td><td>1</td><td>user status(available: 1; deleted: 10)</td></tr><tr><td>authority_group</td><td>int(11)</td><td>NO</td><td></td><td>1</td><td>authority group</td></tr><tr><td>display_name</td><td>varchar(30)</td><td>NO</td><td></td><td></td><td>display name</td></tr><tr><td>avatar</td><td>varchar(255)</td><td>NO</td><td></td><td></td><td>avatar</td></tr><tr><td>mobile</td><td>varchar(20)</td><td>NO</td><td></td><td></td><td>mobile</td></tr><tr><td>bio</td><td>text</td><td>NO</td><td></td><td></td><td>bio markdown</td></tr><tr><td>bio_html</td><td>text</td><td>NO</td><td></td><td></td><td>bio html</td></tr><tr><td>website</td><td>varchar(255)</td><td>NO</td><td></td><td></td><td>website</td></tr><tr><td>location</td><td>varchar(100)</td><td>NO</td><td></td><td></td><td>location</td></tr><tr><td>ip_info</td><td>varchar(255)</td><td>NO</td><td></td><td></td><td>ip info</td></tr><tr><td>is_admin</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>admin flag(deprecated)</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="user_role_rel">user_role_rel<!-- --><a href="#user_role_rel" class="hash-link" aria-label="Direct link to user_role_rel" title="Direct link to user_role_rel"></a></h2>
<!-- --><blockquote>
<!-- --><p>The <!-- --><code>user_role_rel</code> table records the relationship between users and roles.<!-- --></p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>int(11)</td><td>NO</td><td>PRI</td><td></td><td></td></tr><tr><td>created_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>create time</td></tr><tr><td>updated_at</td><td>timestamp</td><td>YES</td><td></td><td></td><td>update time</td></tr><tr><td>user_id</td><td>bigint(20)</td><td>NO</td><td></td><td>0</td><td>user id</td></tr><tr><td>role_id</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>role id</td></tr></tbody></table>
<!-- --><h2 class="anchor anchorWithStickyNavbar_loeA" id="version">version<!-- --><a href="#version" class="hash-link" aria-label="Direct link to version" title="Direct link to version"></a></h2>
<!-- --><blockquote>
<!-- --><p>The version of the current answer is recorded in version table for upgrade.</p>
<!-- --></blockquote>
<!-- --><table><thead><tr><th>COLUMN</th><th>DATA TYPE</th><th>NULLABLE</th><th>KEY</th><th>DEFAULT</th><th>COMMENT</th></tr></thead><tbody><tr><td>id</td><td>int(11)</td><td>NO</td><td>PRI</td><td></td><td>id</td></tr><tr><td>version_number</td><td>int(11)</td><td>NO</td><td></td><td>0</td><td>version_number</td></tr></tbody></table></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/apache/answer-website/edit/main/docs/development/database.md" target="_blank" rel="noopener noreferrer" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_N_05" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page<!-- --></a></div><div class="col lastUpdated_VsjB"><span 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