SQL – Logical Functions
SQL logical functions are used primarily for checking (or testing) the truth of some conditions. A logical function performs a logical operation or comparison on objects and expressions and returns a boolean value −
| Sr.No. | Function & Description | 
|---|---|
| 1 | Returns a item from the list at the specified index value. | 
| 2 | Returns a one of two values, depending on the boolean-expression. | 
| 3 | Returns NULL if both expressions are equal. | 
