Use conditional logic inside queries and data changes.
SELECT CASE WHEN total >= 100 THEN 'large' ELSE 'standard' END FROM orders;SQL CASE expressions
Use conditional logic inside queries and data changes.
Syntax
CASE WHEN condition THEN result ELSE fallback ENDExamples
SQLite-oriented example; consult the relevant dialect manual.
SELECT CASE WHEN total >= 100 THEN 'large' ELSE 'standard' END FROM orders;Parameters, options and clauses
| Option / clause | Description |
|---|---|
SELECT / expression | Choose output columns, expressions, aliases or functions. |
FROM / JOIN | Choose source tables and combine related rows. |
WHERE | Filter rows before grouping; use IS NULL for null checks. |
GROUP BY / HAVING | Group rows and filter aggregate groups. |
ORDER BY | Sort the result; ASC is commonly the default and DESC reverses it. |
LIMIT / OFFSET / FETCH | Limit or skip rows; syntax differs by database dialect. |
Dialect references
Review a command and its target before running it. Commands that alter files, services, accounts, disks, permissions or databases may be difficult to reverse. Test in a safe environment and keep backups.