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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, DUCKDB, EXASOL, FIREBIRD, H2, HANA, HSQLDB, MARIADB, ORACLE, POSTGRES, REDSHIFT,
-- SNOWFLAKE, TERADATA, TRINO, VERTICA, YUGABYTEDB
extract(HOUR FROM TIMESTAMP '2020-02-03 15:30:45.0')
-- BIGQUERY
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
CAST(DATETIME(2020-02-03 15:30:45.0) YEAR TO FRACTION AS CAST(DATETIME HOUR TO HOUR AS CAST(CHAR(2) AS 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 3.19, see #10141), or translate your own on our website
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