microseconds_sub

Description

Subtracts a time interval from a date value. The time interval is in microseconds.

Syntax

DATETIME microseconds_sub(DATETIME expr1,INT expr2);

Parameters

expr1: the time expression. It must be of the DATETIME type.

expr2: the time interval you want to substract, in microseconds. It must be of the INT type.

Return value

Returns a value of the DATETIME type. If the input value is of the DATE type，the hour, minute, and seconds parts are processed as 00:00:00.

Examples

select microseconds_sub('2010-11-30 23:50:50', 2);
+--------------------------------------------+
| microseconds_sub('2010-11-30 23:50:50', 2) |
+--------------------------------------------+
| 2010-11-30 23:50:49.999998                 |
+--------------------------------------------+

select microseconds_sub('2010-11-30', 2);
+-----------------------------------+
| microseconds_sub('2010-11-30', 2) |
+-----------------------------------+
| 2010-11-29 23:59:59.999998        |
+-----------------------------------+
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