HOUR

Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition

Extract the HOUR value from a datetime value.

The HOUR function is a short version of the EXTRACT, passing a DatePart.HOUR value as an argument.

SELECT hour(TIMESTAMP '2020-02-03 15:30:45');

create.select(hour(Timestamp.valueOf("2020-02-03 15:30:45"))).fetch();

The result being

+------+
| hour |
+------+
|   15 |
+------+

Dialect support

This example using jOOQ:

hour(Timestamp.valueOf("2020-02-03 15:30:45"))

Translates to the following dialect specific expressions:

-- ACCESS
datepart('h', #2020/02/03 15:30:45#)

-- ASE, SYBASE
datepart(hh, '2020-02-03 15:30:45.0')

-- AURORA_MYSQL, MEMSQL, MYSQL
extract(HOUR FROM {ts '2020-02-03 15:30:45.0'})

-- AURORA_POSTGRES, COCKROACHDB, EXASOL, FIREBIRD, H2, HANA, HSQLDB, IGNITE, INGRES, MARIADB, ORACLE, POSTGRES, REDSHIFT, 
-- SNOWFLAKE, TERADATA, VERTICA
extract(HOUR FROM TIMESTAMP '2020-02-03 15:30:45.0')

-- BIGQUERY
extract(HOUR FROM DATETIME'2020-02-03 15:30:45.0')

-- CUBRID
extract(HOUR FROM DATETIME '2020-02-03 15:30:45.0')

-- DB2
HOUR(TIMESTAMP '2020-02-03 15:30:45.0')

-- DERBY
HOUR(TIMESTAMP('2020-02-03 15:30:45.0'))

-- INFORMIX
DATETIME(2020-02-03 15:30:45.0) YEAR TO FRACTION::DATETIME HOUR TO HOUR::CHAR(2)::INT

-- SQLDATAWAREHOUSE, SQLSERVER
datepart(hh, CAST('2020-02-03 15:30:45.0' AS DATETIME2))

-- SQLITE
CAST(strftime('%H', '2020-02-03 15:30:45.0') AS int)

(These are currently generated with jOOQ 3.15, see #10141)

The jOOQ User Manual : SQL building : Column expressions : Datetime functions : HOUR

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