Quick Reference
The MySQL CASE statement goes through conditions and will stop reading and return a value when the first condition in the list is met.
SELECT Order_id, quantity,
CASE WHEN quantity > 25 THEN 'The quantity is greater than 25.'
WHEN quantity = 25 THEN 'The quantity is 25.'
ELSE 'The quantity is under 25.'
END AS quantity_text
FROM Orders;Output
Number of Records: 55
order_id quantity quantity_text
48 5 The quantity is under 25.
49 9 The quantity is under 25.
50 35 The quantity is greater than 25.
55 25 The quantity is 25.Syntax
CASE
WHEN condition1 THEN result1
WHEN condition2 THEN result2
WHEN conditionN THEN resultN
ELSE result
END;Parameters
| Parameter | Description |
|---|---|
| condition1, condition2, ...conditionN | The conditions evaluated in order (required) |
| result1, result2, ...resultN | The value to return once a condition is true (required) |
SQL Notes:
- Any work being done to modify the structure of a database or delete tables or the the database itself should only be done after making a recent backup
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