Results for “Schema design & transactions”
Small, practical examples. Search by task or narrow things down below.
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
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
Expand an array into rows
Use WITH ORDINALITY to retain original element order.
unnest✓ Tested
Extract part of a date
Read a calendar component with EXTRACT.
EXTRACT✓ Tested
Filter by a numeric comparison
Postgres: Keep rows whose quantity exceeds a chosen threshold.
Postgres✓ Tested
Filter groups after aggregation
Postgres: Use HAVING to test a group’s calculated total.
Postgres✓ Tested
Filter rows before grouping
SQL: WHERE limits the rows contributing to the aggregate; it differs from filtering completed groups with HAVING.
SQL✓ Tested