Results for “generated column”
Small, practical examples. Search by task or narrow things down below.
Distinguish row count from non-null value count
SQLite: COUNT(*) includes every row while COUNT(column) skips NULL values.
SQLite✓ Tested
Divide an ordered result into numbered buckets
SQL: NTILE distributes rows across buckets; include a unique tie-breaker for deterministic assignment.
SQL✓ Tested
Divide an ordered result into numbered buckets
SQL Server: NTILE distributes rows across buckets; include a unique tie-breaker for deterministic assignment.
SQL Server✓ Tested
Divide an ordered result into numbered buckets
Postgres: NTILE distributes rows across buckets; include a unique tie-breaker for deterministic assignment.
Postgres✓ Tested
Divide an ordered result into numbered buckets
SQLite: NTILE distributes rows across buckets; include a unique tie-breaker for deterministic assignment.
SQLite✓ Tested
Enable and use foreign keys
Turn on relationship enforcement for the connection.
foreign keys✓ Tested
Enforce a bounded numeric range
SQL: A named CHECK constraint keeps numeric values inside an inclusive interval.
SQL✓ Tested
Enforce a bounded numeric range
SQL Server: A named CHECK constraint keeps numeric values inside an inclusive interval.
SQL Server✓ Tested
Enforce a bounded numeric range
Postgres: A named CHECK constraint keeps numeric values inside an inclusive interval.
Postgres✓ Tested
Enforce a bounded numeric range
SQLite: A named CHECK constraint keeps numeric values inside an inclusive interval.
SQLite✓ Tested
Enforce uniqueness with a dedicated index
SQL: A unique index rejects a duplicate combination independently of query plans.
SQL✓ Tested
Enforce uniqueness with a dedicated index
SQL Server: A unique index rejects a duplicate combination independently of query plans.
SQL Server✓ Tested