sql

Scalar subquery returned multiple rows

subquery returns more than.*row|Scalar subquery produced more than one element

Fixes

1.Add LIMIT 1 to the subquery if only one row is expected
2.Use IN or EXISTS instead of = for multi-row subqueries
3.Add additional WHERE conditions to narrow to one row
4.Use an aggregate: (SELECT MAX(col) FROM ...)

subqueryscalar

Related Errors

PostgreSQL JSONB extracting from scalar

ERROR:.*cannot extract elements from a scalar.*jsonb

•Check value is an object/array before extraction: jsonb_typeof(col) = 'object'
•Use COALESCE with '{}' for null/scalar values

PostgreSQL JSONB operator type mismatch

ERROR:.*operator does not exist.*jsonb @> text

•Cast the right operand to jsonb: col @> '{"key": "val"}'::jsonb
•Use ->> operator for text extraction instead of ->

PostgreSQL full-text search config not found

ERROR:.*text search configuration.*does not exist

•Create the text search configuration or use a built-in one (english, simple)
•Install the pg_catalog extension if using a custom configuration