json_objectagg

Behaves like json_object, but as an aggregate function, so it only takes one key_expression and one value_expression parameter.

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

Behaves like json_object, but as an aggregate function, so it only takes one key_expression and one value_expression parameter.

Signatures and overloads

json_objectagg ( [ { key_expression { VALUE | ':' } value_expression } ] [ { NULL | ABSENT } ON NULL] [ { WITH | WITHOUT } UNIQUE [KEYS] ] [RETURNING data_type [FORMAT JSON [ENCODING UTF8] ] ])

Behaves like json_object, but as an aggregate function, so it only takes one key_expression and one value_expression parameter.

Compare versions

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-20261023:4ed3ba4c6c3fccfdcd999f56c3b9c1d1a139c4d17edfd9527a1590596a6c7559

Text language: en · wiki-repair-20261023:4ed3ba4c6c3fccfdcd999f56c3b9c1d1a139c4d17edfd9527a1590596a6c7559