TRUNC

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

The TRUNC() function rounds a numeric value to its nearest integer (or optionally, to a specific decimal precision) that is closer to zero.

SELECT 
  trunc(1.7), 
  trunc(-1.7);

create.select(
  trunc(1.7), 
  trunc(-1.7)).fetch();

The result being

+-------+-------+
| trunc | trunc |
+-------+-------+
|     1 |    -1 |
+-------+-------+

Dialect support

This example using jOOQ:

trunc(1.7)

Translates to the following dialect specific expressions:

-- AURORA_POSTGRES, POSTGRES
CAST(trunc(CAST(1.7E0 AS numeric), 0) AS double precision)

-- COCKROACHDB
CAST(trunc(CAST(CAST(1.7E0 AS double precision) AS numeric), 0) AS double precision)

-- CUBRID, DB2, HSQLDB, INFORMIX, ORACLE, VERTICA
trunc(1.7E0, 0)

-- H2
truncate(CAST(1.7E0 AS double), 0)

-- ACCESS, ASE, AURORA_MYSQL, BIGQUERY, DERBY, EXASOL, FIREBIRD, HANA, IGNITE, MARIADB, MEMSQL, MYSQL, REDSHIFT, SNOWFLAKE, 
-- SQLDATAWAREHOUSE, SQLITE, SQLSERVER, SYBASE, TERADATA
/* UNSUPPORTED */

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

The jOOQ User Manual : SQL building : Column expressions : Numeric functions : TRUNC

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