count

Computes the number of input rows.

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

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group: aggregate
group label: 聚合函数
lang: en
layout: table-new
pages: functions-aggregate.html
prose only: false

Definition PG 18

Computes the number of input rows.

Signatures and overloads

count ( * ) → bigint → bigint

Computes the number of input rows.

count ( "any" ) → bigint → bigint

Computes the number of input rows in which the input value is not null.

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Complete source facts

documentation revision

{"inputs":[{"file":"functions-aggregate.html","kind":"same-version-reviewed-manual","locale":"en","sha256":"31d3dcd36ef353484b4b3535f9f0d1cc239c3910146257fe5178f99b90b501e2","version":"18.7"},{"file":"functions-aggregate.html","kind":"same-version-reviewed-manual","locale":"zh-Hans","sha256":"0bf7506d27b71666fc74840a21a8f77c8a92735174f1d05033865961722e457c","version":"18.7"}],"release":"18.7","runtime_remeasured":false,"source_revision":"pgdoc:b9f0e7232f60f380d642ac9b99226606c254b552"}

Source references

Original manual reference

Full definition and evidence JSON

Definition sources

center · PostgreSQL 18 · wiki-repair-20261023:f5870b5a630d630397edac865af932e7aff028b09db7aeb49cd5107a7e52c3c9

Text language: en · wiki-repair-20261023:f5870b5a630d630397edac865af932e7aff028b09db7aeb49cd5107a7e52c3c9