|
Function |
SQLite |
Description |
|---|---|---|
|
COALESCE( arg1,..., argN ) |
Yes |
Returns the first argument passed to it that is non-NULL. Returns NULL if all arguments are NULL. Requires at least two arguments. |
|
IFNULL( arg1, arg2 ) |
Yes |
Returns arg1 if not NULL, otherwise arg2. Basically, IFNULL is a two-argument version of COALESCE(). |
|
NULLIF( arg1, arg2 ) |
Yes |
Returns arg1 if arg1 and arg2 are different and returns NULL if the arguments are equal. Used when you have non-NULL values in your database that you want to treat as NULL. |