Use STRING_AGG/GROUP_CONCAT to concatenate values

Control ordering and separators in aggregated strings

Handle NULL values in string aggregation

Combine string aggregation with GROUP BY

Build comma-separated lists and tag collections

Understand database-specific syntax differences

Use STRING_AGG/GROUP_CONCAT to concatenate values

Control ordering and separators in aggregated strings

Handle NULL values in string aggregation

Combine string aggregation with GROUP BY

Build comma-separated lists and tag collections

Understand database-specific syntax differences