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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:

CASE
  WHEN sign(1.7E0) >= 0 THEN (floor((1.7E0 * 1)) / 1)
  ELSE (ceiling((1.7E0 * 1)) / 1)
END

truncate(1.7E0, 0)

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

trunc(1.7E0, 0)

CASE
  WHEN sign(1.7E0) >= 0 THEN (floor((1.7E0 * 1)) / 1)
  ELSE (ceil((1.7E0 * 1)) / 1)
END

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

round(1.7E0, 0, round_down)

round(1.7E0, 0, 1)

truncnum(1.7E0, 0)

/* UNSUPPORTED */

Generated with jOOQ 3.20. Translate your own SQL on our website

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