9 lines
276 B
SQL
9 lines
276 B
SQL
SELECT
|
|
IF(can_fly, 'Superman', 'Batman'),
|
|
-- replace NULL with string
|
|
IFNULL(can_fly, 'Not clear if this user can fly'),
|
|
-- alias for IFNULL
|
|
NVL(can_fly, 'Not clear if this user can fly'),
|
|
-- replace '' with NULL
|
|
NULLIF(can_fly, '')
|
|
FROM user;
|