docs/sql-error-conditions-unsupported-merge-condition-error-class.md

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title: UNSUPPORTED_MERGE_CONDITION error class
displayTitle: UNSUPPORTED_MERGE_CONDITION error class
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[SQLSTATE: 42K0E](sql-error-conditions-sqlstates.html#class-42-syntax-error-or-access-rule-violation)

MERGE operation contains unsupported `<condName>` condition.

This error class has the following derived error classes:

## AGGREGATE

Aggregates are not allowed: `<cond>`.

## NON_DETERMINISTIC

Non-deterministic expressions are not allowed: `<cond>`.

## SUBQUERY

Subqueries are not allowed: `<cond>`.