Results for “SQL Server”
Small, practical examples. Search by task or narrow things down below.
Read updated base-table values through a view
SQLite: An ordinary view reflects later changes to its underlying data.
SQLite✓ Tested
Reference a parent identified by two columns
SQL: A composite foreign key checks the complete referenced key rather than either column independently.
SQL✓ Tested
Reference a parent identified by two columns
SQLite: A composite foreign key checks the complete referenced key rather than either column independently.
SQLite✓ 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
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
Reject duplicate business identifiers
SQLite: A UNIQUE constraint protects a business key independently of the primary key.
SQLite✓ Tested
Remove dependent rows with a declared cascade
SQL: ON DELETE CASCADE removes children when their referenced parent is deleted.
SQL✓ Tested
Remove dependent rows with a declared cascade
SQLite: ON DELETE CASCADE removes children when their referenced parent is deleted.
SQLite✓ Tested
Remove duplicate result values
SQL: Use DISTINCT when repeated category values are not useful.
SQL✓ Tested
Remove duplicate result values
SQLite: Use DISTINCT when repeated category values are not useful.
SQLite✓ Tested
Remove duplicate values while keeping the smallest key
SQL: Identify retained keys in a grouped subquery before deleting other copies.
SQL✓ Tested