Error
Error Code:
1057
MariaDB Error 1057: Mixed Aggregate and Non-Aggregate Columns
Description
MariaDB Error 1057 occurs when a SQL SELECT statement attempts to combine aggregate functions (like SUM(), COUNT(), AVG()) with non-aggregated columns that are not included in a GROUP BY clause. This ambiguity prevents MariaDB from determining how to properly group the results, leading to a syntax error and query failure.
Error Message
Statement has sum functions and columns in same statement
Known Causes
3 known causesMissing GROUP BY Clause
The most common cause is omitting the GROUP BY clause entirely when using aggregate functions alongside non-aggregated columns in the SELECT list.
Incomplete GROUP BY Clause
Not all non-aggregated columns present in the SELECT list are included in the GROUP BY clause, violating SQL's aggregation rules.
Mixing Detail and Summary Data
The query attempts to retrieve both individual row details and aggregated summary results in a single SELECT statement without proper separation or grouping logic.
Solutions
Coming SoonDetailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:
General Troubleshooting Tips
- Check the error message carefully for specific details
- Review recent changes that might have caused the error
- Search for the exact error code in the official documentation
- Check log files for additional context
- Try restarting the application or service