| [MySQL|http://www.mysql.com] is an open-source RDBMS that's very easy to set up and use. We sometimes use MySQL in the development phase of projects when we need a database we can administer ourselves because of frequent schema changes. [Hypersonic] is another nice RDBMS for this purpose. Recently, getting an [Oracle] instance made and administering it ourselves has become easier, so we're relying less on MySQL. |
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| h1. Reference |
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| Here's a quick list of common MySQL commands (most of these are just plain SQL, actually). |
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| List of databases: |
| {{SHOW DATABASES;}} |
| Switch to database: |
| {{USE dbname;}} |
| List of tables in database: |
| {{SHOW TABLES;}} |
| Table details: |
| {{DESCRIBE tblname;}} |
| Create database: |
| {{CREATE DATABASE dbname;}} |
| Grant privileges on database: |
| {{GRANT ALL ON dbname.* TO username;}} |
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| Add table: |
| {{CREATE TABLE tblname (colname type, colname type, ...);}} |
| Remove table: |
| {{DROP TABLE tblname;}} |
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| Add column: |
| {{ALTER TABLE tblname ADD colname type \[NOT NULL\] \[DEFAULT value\];}} |
| Remove column: |
| {{ALTER TABLE tblname DROP colname;}} |
| Rename column: |
| {{ALTER TABLE tblname CHANGE colname newcolname (same type);}} |
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| Insert row: |
| {{INSERT tblname (colname,...) VALUES (expr,...);}} |
| Update rows: |
| {{UPDATE tblname SET colname=expr, ... \[WHERE where_expr\];}} |
| Remove rows: |
| {{DELETE FROM tblname \[WHERE where_expr\];}} |
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| Compare with NULL: |
| {{colname IS \[NOT\] NULL}} |
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