trunc

Truncates to integer (towards zero)

English manual coverage begins with PostgreSQL 7.1. Source history and runtime observations have their own recorded version boundaries.

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group: math
group label: 数学函数和操作符
lang: en
layout: table-new
pages: functions-math.html, functions-net.html
prose only: false

Definition PG 18

Truncates to integer (towards zero)

Signatures and overloads

trunc ( numeric ) → numeric → numeric

Truncates to integer (towards zero)

trunc ( double precision ) → double precision → double precision

Truncates to integer (towards zero)

trunc ( v numeric, s integer ) → numeric → numeric

Truncates v to s decimal places

trunc ( macaddr ) → macaddr → macaddr

Sets the last 3 bytes of the address to zero. The remaining prefix can be associated with a particular manufacturer (using data not included in PostgreSQL).

trunc ( macaddr8 ) → macaddr8 → macaddr8

Sets the last 5 bytes of the address to zero. The remaining prefix can be associated with a particular manufacturer (using data not included in PostgreSQL).

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Complete source facts

documentation revision

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Source references

Original manual reference

Full definition and evidence JSON

Definition sources

center · PostgreSQL 18 · wiki-repair-20261023:9754f939793b5680eab5fe7f1eb64a8738b08eefea6a2fc0d5bed6ea365efc5f

Text language: en · wiki-repair-20261023:9754f939793b5680eab5fe7f1eb64a8738b08eefea6a2fc0d5bed6ea365efc5f