Syntax

NOW([precision])
CURRENT_TIMESTAMP
CURRENT_TIMESTAMP([precision])
LOCALTIME, LOCALTIME([precision])
LOCALTIMESTAMP
LOCALTIMESTAMP([precision])

Description

Returns the current date and time as a value in 'YYYY-MM-DD HH:MM:SS' or YYYYMMDDHHMMSS.uuuuuu format, depending on whether the function is used in a string or numeric context. The value is expressed in the current time zone.

The optional precision determines the microsecond precision. See Microseconds in MariaDB.

NOW() (or its synonyms) can be used as the default value for TIMESTAMP columns as well as, since MariaDB 10.0.1, DATETIME columns. Before MariaDB 10.0.1, it was only possible for a single TIMESTAMP column per table to contain the CURRENT_TIMESTAMP as its default.

When displayed in the INFORMATION_SCHEMA.COLUMNS table, a default CURRENT TIMESTAMP is displayed as CURRENT_TIMESTAMP up until MariaDB 10.2.2, and as current_timestamp() from MariaDB 10.2.3, due to to MariaDB 10.2 accepting expressions in the DEFAULT clause.

Examples

SELECT NOW();
+---------------------+
| NOW()               |
+---------------------+
| 2010-03-27 13:13:25 |
+---------------------+

SELECT NOW() + 0;
+-----------------------+
| NOW() + 0             |
+-----------------------+
| 20100327131329.000000 |
+-----------------------+

With precision:

SELECT CURRENT_TIMESTAMP(2);
+------------------------+
| CURRENT_TIMESTAMP(2)   |
+------------------------+
| 2018-07-10 09:47:26.24 |
+------------------------+

Used as a default TIMESTAMP:

CREATE TABLE t (createdTS TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP);

From MariaDB 10.2.2:

SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA='test'
  AND COLUMN_NAME LIKE '%ts%'\G
*************************** 1. row ***************************
           TABLE_CATALOG: def
            TABLE_SCHEMA: test
              TABLE_NAME: t
             COLUMN_NAME: ts
        ORDINAL_POSITION: 1
          COLUMN_DEFAULT: current_timestamp()
...

<= MariaDB 10.2.1

SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA='test'
  AND COLUMN_NAME LIKE '%ts%'\G
*************************** 1. row ***************************
           TABLE_CATALOG: def
            TABLE_SCHEMA: test
              TABLE_NAME: t
             COLUMN_NAME: createdTS
        ORDINAL_POSITION: 1
          COLUMN_DEFAULT: CURRENT_TIMESTAMP
...

See Also

Comments

Comments loading...