Results for “SQL Server”
Small, practical examples. Search by task or narrow things down below.
Sum a row and its immediate predecessor
SQL Server: A ROWS frame counts physical ordered rows rather than all peers with the same sort value.
SQL Server✓ Tested
Treat an empty trimmed value as missing
SQL Server: NULLIF converts an empty string to NULL before a fallback is applied.
SQL Server✓ Tested
Turn a condition into a result label
SQL Server: Use CASE to describe stock availability for each row.
SQL Server✓ Tested
Turn known group values into columns
SQL Server: Conditional aggregation gives a portable pivot when the category set is known.
SQL Server✓ Tested
Undo a multi-row transfer atomically
SQL Server: The first transaction commits the fixtures. Rolling back the second transaction restores both sides of the attempted transfer.
SQL Server✓ Tested
Undo only the work after a savepoint
SQL Server: After committing the fixtures, roll back a trial change while keeping earlier work in the second transaction.
SQL Server✓ Tested
Update one row using its primary key
SQL Server: Use a precise WHERE condition to change only the intended row in a scratch table.
SQL Server✓ Tested
Update rows selected by a related table
SQL Server: Use EXISTS to limit updates based on an independent eligibility table.
SQL Server✓ Tested
Update several classifications in one statement
SQL Server: A CASE expression computes the new value for each row covered by the update predicate.
SQL Server✓ Tested
Catch a T-SQL error
Handle an expected conversion error in TRY/CATCH.
TRY CATCH✓ Tested
Calculate a value with SELECT
SQL: Evaluate a small arithmetic expression on the database server.
SQL✓ Tested
Calculate a value with SELECT
SQLite: Evaluate a small arithmetic expression on the database server.
SQLite✓ Tested