The query mixes aggregate functions like SUM() with non-aggregated columns without a GROUP BY clause, so MySQL raises ER_WRONG_SUM_SELECT (error 1057).
MySQL Error 1057: ER_WRONG_SUM_SELECT appears when a SELECT statement includes SUM(), COUNT(), or other aggregate functions alongside raw columns without a matching GROUP BY. Add the required GROUP BY or remove the non-aggregated fields to resolve the error quickly.
Statement has sum functions and columns in same statement
The server blocks queries that combine aggregate functions and plain columns without grouping because the result set would be ambiguous.
MySQL signals this situation with error code 1057, condition ER_WRONG_SUM_SELECT, and SQLSTATE 42000.
The error fires at parse time when MySQL detects that at least one aggregate expression (SUM, AVG, COUNT, MIN, MAX) coexists with non-aggregated columns in the SELECT list and no GROUP BY clause is provided.
Leaving the query unfixed blocks execution, disrupts application flows, and can hide data quality issues.
Correcting the statement ensures accurate analytics and prevents runtime failures in production workloads.
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All supported versions enforce this rule, but sql_mode=ONLY_FULL_GROUP_BY makes similar checks stricter.
No. Unlike ONLY_FULL_GROUP_BY, ER_WRONG_SUM_SELECT cannot be bypassed and must be fixed by rewriting the query.
GROUP BY tells MySQL how to collapse rows so each aggregate and each non-aggregated column produce a single value per group.
Galaxy’s IntelliSense warns about aggregate mismatches and can auto-generate the correct GROUP BY, reducing debugging time.
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