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. |