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xmlagg

The function xmlagg is, unlike the other functions described here, an aggregate function. It concatenates the input values to the aggregate function call, much like xmlconcat does, except that concatenation occurs across rows rather than across expressions in a single row. See Section 9.21 for additional information about aggregate functions.

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

Reading PG 18·Select a recorded version

group
xml
group label
XML 函数
lang
en
layout
table-new
pages
functions-xml.html, functions-aggregate.html
prose only
false

Definition PG 18

The function xmlagg is, unlike the other functions described here, an aggregate function. It concatenates the input values to the aggregate function call, much like xmlconcat does, except that concatenation occurs across rows rather than across expressions in a single row. See Section 9.21 for additional information about aggregate functions.

Signatures and overloads

xmlagg ( xml ) → xml → xml
The function xmlagg is, unlike the other functions described here, an aggregate function. It concatenates the input values to the aggregate function call, much like xmlconcat does, except that concatenation occurs across rows rather than across expressions in a single row. See Section 9.21 for additional information about aggregate functions.
xmlagg ( xml ORDER BY input_sort_columns ) → xml → xml
Concatenates the non-null XML input values (see Section 9.15.1.8).

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Complete source facts

documentation revision

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Source references

Full definition and evidence JSON

Definition sources

center · PostgreSQL 18 · wiki-repair-20261023:1c575e609cf773691ca938ddf20817133f9de748590a3e8a91cf8ebdb058dcbc

Text language: en · wiki-repair-20261023:1c575e609cf773691ca938ddf20817133f9de748590a3e8a91cf8ebdb058dcbc