MILLISECONDS_SUB

Description

The MILLISECONDS_SUB function subtracts a specified number of milliseconds from the input datetime value and returns the resulting new datetime value. This function supports processing DATETIME types.

Syntax

MILLISECONDS_SUB(`<datetime>`, `<delta>`)

Parameters

Parameter	Description
<datetime>	The input datetime value, of type DATETIME. For specific datetime formats, see datetime conversion.
<delta>	The number of milliseconds to subtract, of type BIGINT. 1 second = 1,000 milliseconds = 1,000,000 microseconds.

Return Value

Returns a value of type DATETIME, representing the result of subtracting the specified milliseconds from the base time.

• If <delta> is negative, the function behaves the same as adding the corresponding milliseconds to the base time.
• If the input is of DATE type (only includes year, month, and day), the default time part is set to 00:00:00.000.
• If the calculation result exceeds the valid range of the DATETIME type (0000-01-01 00:00:00 to 9999-12-31 23:59:59.999999), an exception is thrown.
• If any parameter is NULL, the function returns NULL.

Examples

-- Subtract 1 millisecond
SELECT MILLISECONDS_SUB('2023-09-08 16:02:08.435123', 1);
+---------------------------------------------------+
| MILLISECONDS_SUB('2023-09-08 16:02:08.435123', 1) |
+---------------------------------------------------+
| 2023-09-08 16:02:08.434123                        |
+---------------------------------------------------+

-- Negative delta (equivalent to addition)
SELECT MILLISECONDS_SUB('2023-05-01 10:00:00.200', -300);
+---------------------------------------------------+
| MILLISECONDS_SUB('2023-05-01 10:00:00.200', -300) |
+---------------------------------------------------+
| 2023-05-01 10:00:00.500000                        |
+---------------------------------------------------+

-- Input is of DATE type (default time is 00:00:00.000)
SELECT MILLISECONDS_SUB('2023-01-01', 1500);
+--------------------------------------+
| MILLISECONDS_SUB('2023-01-01', 1500) |
+--------------------------------------+
| 2022-12-31 23:59:58.500000           |
+--------------------------------------+

-- Calculation result exceeds the datetime range, throws an exception
SELECT MILLISECONDS_SUB('0000-01-01',-1500);
ERROR 1105 (HY000): errCode = 2, detailMessage = (10.16.10.3)[E-218]Operation milliseconds_add of 0000-01-01 00:00:00, -1500 out of range

-- Any parameter is NULL, returns NULL
SELECT MILLISECONDS_SUB(NULL, 100), MILLISECONDS_SUB('2023-01-01', NULL) AS after_sub;
+------------------------------+----------------------------+
| milliseconds_sub(NULL, 100)  | after_sub                  |
+------------------------------+----------------------------+
| NULL                         | NULL                       |
+------------------------------+----------------------------+