MySQL IF() Function
Example
Return "YES" if the condition is TRUE, or "NO" if the condition is FALSE:
  SELECT 
  IF(500<1000, "YES", "NO");
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Definition and Usage
The IF() function returns one value if a condition is TRUE, or another value if a condition is FALSE.
Note: The IF() function can return either a string or a numeric value.
Syntax
  IF(condition, value_if_true, value_if_false)Parameter Values
| Parameter | Description | 
|---|---|
| condition | Required. The value to test | 
| value_if_true | Optional. The value to return if condition evaluates to TRUE | 
| value_if_false | Optional. The value to return if condition evaluates to FALSE | 
Technical Details
| Works in: | MySQL 5.7, MySQL 5.6, MySQL 5.5, MySQL 5.1, MySQL 5.0, MySQL 4.1, MySQL 4.0, MySQL 3.23 | 
|---|
More Examples
Example
Return 5 if the condition is TRUE, or 10 if the condition is FALSE:
  SELECT IF(500<1000, 5, 10);
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Example
Test whether two strings are the same and return "YES" if they are, or "NO" if not:
  SELECT IF(STRCMP("hello","bye") = 0, "YES", "NO");
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Example
Return "MORE" if the condition is TRUE, or "LESS" if the condition is FALSE:
  SELECT OrderID, Quantity, IF(Quantity>10, "MORE", "LESS")
FROM 
  OrderDetails;
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