Results for “generated column”
Small, practical examples. Search by task or narrow things down below.
Read the smallest and largest values
Postgres: Use MIN and MAX without sorting and fetching every row.
Postgres✓ Tested
Read the smallest and largest values
SQLite: Use MIN and MAX without sorting and fetching every row.
SQLite✓ Tested
Read updated base-table values through a view
SQL: An ordinary view reflects later changes to its underlying data.
SQL✓ Tested
Read updated base-table values through a view
SQL Server: An ordinary view reflects later changes to its underlying data.
SQL Server✓ Tested
Read updated base-table values through a view
Postgres: An ordinary view reflects later changes to its underlying data.
Postgres✓ Tested
Read updated base-table values through a view
SQLite: An ordinary view reflects later changes to its underlying data.
SQLite✓ Tested
Read values from an inserted row
Use RETURNING to retrieve an automatically assigned row ID.
RETURNING✓ Tested
Reject a negative quantity with CHECK
SQL: Combine NOT NULL and CHECK because an unknown NULL check result is normally accepted.
SQL✓ Tested
Reject a negative quantity with CHECK
SQL Server: Combine NOT NULL and CHECK because an unknown NULL check result is normally accepted.
SQL Server✓ Tested
Reject a negative quantity with CHECK
Postgres: Combine NOT NULL and CHECK because an unknown NULL check result is normally accepted.
Postgres✓ Tested
Reject a negative quantity with CHECK
SQLite: Combine NOT NULL and CHECK because an unknown NULL check result is normally accepted.
SQLite✓ Tested
Reject duplicate business identifiers
SQL: A UNIQUE constraint protects a business key independently of the primary key.
SQL✓ Tested