IFNULL
Syntax
IFNULL( check_value, alt_value )
Description
Returns check_value if it's not NULL. Otherwise returns alt_value.
Argument types:
check_value—Anyalt_value—Any
Return type: Same type as (check_value, alt_value)
Note
Arguments (check_value, alt_value) must be of the same type.
Example
| [sales] | IFNULL([sales], -100.0) |
|---|---|
432.40 |
432.40 |
77.00 |
77.00 |
12000.00 |
12000.00 |
NULL |
-100.00 |
34.25 |
34.25 |
128.00 |
128.00 |
0.00 |
0.00 |
NULL |
-100.00 |
Data source support
ClickHouse 21.8, Microsoft SQL Server 2017 (14.0), MySQL 5.7, Oracle Database 12c (12.1), PostgreSQL 9.3, YDB.