| Function Name | Description |
|---|---|
| IS [NOT] DISTINCT FROM | Compares two expressions to determine whether they have the same or different values. NULLs are considered as comparable values. |
| ISFALSE | Tests whether the input expression is false. If it is, returns a value of true. |
| IS [NOT] NULL | Determines if an expression is NULL or not NULL. Alias for the function ISNULL/ISNOTNULL. |
| ISNUMERIC | Determines whether an expression is a valid numeric type (DECIMAL, DOUBLE, INT, BIGINT, VARBINARY). |
| ISTRUE | Returns TRUE if the input expression evaluates to TRUE. |
| IS_MEMBER | Returns whether the current user is a member of the specified role. |