I have this mysql code:
SELECT firstname, lastname, age, gender from persons WHERE id = 1;
Display:
> firstname: Marlon
>
> lastname: Null
>
> age: 26
>
> gender: male
What I want to do is:
SELECT IF NULL DONT SELECT(firstname), IF NULL DONT SELECT(lastname), IF NULL DONT SELECT(age), IF NULL DONT SELECT(gender) from persons WHERE id = 1;
Display:
> firstname: Marlon
>
> age: 26
>
> gender: male
lastname didn't display because its null
Certainly you can't do that; rather you can use COALESCE()
or IFNULL()
function to provide a default value in case of NULL
like
SELECT firstname,
COALESCE(lastname,'N/A'),
age,
gender from persons WHERE id = 1;
(OR) if you want to remove that record completely then use a WHERE
condition like
SELECT firstname, lastname, age, gender from persons
WHERE id = 1 AND lastname IS NOT NULL;