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| <pre>public static class <span class="typeNameLabel">NearestDateFunctions.NearestDateFunctionWithString</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> |
| implements <a href="../../../../../org/apache/drill/exec/expr/DrillSimpleFunc.html" title="interface in org.apache.drill.exec.expr">DrillSimpleFunc</a></pre> |
| <div class="block">This function takes three arguments, an input date string, an input date format string, and an interval and returns |
| the previous date that is the first date in that period. This function is intended to be used in time series analysis to |
| aggregate by various units of time. |
| Usage is: |
| <p> |
| SELECT <date_field>, COUNT(*) AS event_count |
| FROM ... |
| GROUP BY nearestDate(`date_field`, 'yyyy-mm-dd', 'QUARTER') |
| <p> |
| Currently supports the following time units: |
| <p> |
| YEAR |
| QUARTER |
| MONTH |
| WEEK_SUNDAY |
| WEEK_MONDAY |
| DAY |
| HOUR |
| HALF_HOUR |
| QUARTER_HOUR |
| MINUTE |
| 30SECOND |
| 15SECOND |
| SECOND</div> |
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| <td class="colFirst"><code>void</code></td> |
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