The snippet library.
Small, practical examples. Search by task or narrow things down below.
Sort preferred rows ahead of other rows
SQL Server: A CASE ordering key expresses business priority before a stable secondary sort.
SQL Server✓ Tested
Sort the highest quantities first
SQL Server: Specify descending order and a stable tie breaker.
SQL Server✓ Tested
Split delimited text with positions
Retain original order with STRING_SPLIT ordinals.
STRING_SPLIT✓ Tested
Substitute a value for NULL
Use SQL Server’s ISNULL expression.
ISNULL✓ Tested
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 JSON into typed rows
Project JSON array items into SQL columns.
OPENJSON✓ 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 a JSON property
Create updated JSON text with JSON_MODIFY.
JSON_MODIFY✓ Tested