Mysql ifnull

Mysql else if

IF condition1 THEN
    statements;
ELSEIF condition2 THEN # OPTIONAL
	statements;
ELSE # OPTIONAL
    statements;
END IF;

Mysql ifnull

##syntax:
SELECT IFNULL(col_with_null_value, default_value);

##you can see the result select with the string NA where the document is null:
SELECT IFNULL(user_document_id, 'NA');

Mysql if null

IFNULL(MAX(EMAIL), "example@google.com") as email

If column value is null then in mysql

 SELECT 
    contactname, IFNULL(bizphone, homephone) phone
FROM
    contacts;

Source: mysqltutorial.org

Similar codes

1 vote248 views1 answer
Cannot drop database because it is currently in use
SQL
5 votes248 views3 answers
Mysql remove unique constraint
SQL
0 vote252 views1 answer
Postgres clear table
SQL
1 vote251 views1 answer
Quit mysql
SQL
1 vote231 views1 answer
Wordpress change url phpmyadmin
SQL
0 vote271 views1 answer
Generate sql from specific migration ef core
SQL
12 votes258 views2 answers
Select into insert sql server
SQL
0 vote243 views1 answer
How to insert multiple rows in mysql using laravel
SQL
3 votes263 views2 answers
Syntax error or access violation: 1701 Cannot truncate a table referenced in a foreign key constraint
SQL
8 votes250 views2 answers
Sqlsrv default port
SQL