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toStartOfMonth

Rounds down a date or date with time to the first day of the month. Returns the date.

Syntax​

toStartOfMonth(expr)

Arguments​

ArgumentsDescription
exprdate16/date32/datetime

Return Type​

Datetime object, returns date in “YYYY-MM-DD” format.

Examples​

SELECT toStartOfMonth(toDate(18869));
+-------------------------------+
| toStartOfMonth(toDate(18869)) |
+-------------------------------+
| 2021-08-01                    |
+-------------------------------+

SELECT toStartOfMonth(toDateTime(1630812366));
+----------------------------------------+
| toStartOfMonth(toDateTime(1630812366)) |
+----------------------------------------+
| 2021-09-01                             |
+----------------------------------------+