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

0 vote212 views1 answer
Renommer schema sql
SQL
0 vote185 views1 answer
Bidirectional outer join sql
SQL
8 votes211 views1 answer
Ltrim sql
SQL
0 vote205 views1 answer
Can we rollback data that are deleted using DELETE clause?
SQL
1 vote180 views2 answers
Sql server add time to date
SQL
0 vote248 views1 answer
Mac os zsh: command not found: mysql
SQL
16 votes183 views3 answers
Tsql rename column name
SQL
4 votes273 views1 answer
Select first and last row sql
SQL
0 vote288 views1 answer
SCRAM authentication requires libpq version 10 or above (SQL: select * from information_schema.tables where table_schema = public and table_name = migrations and table_type = 'BASE TABLE')
SQL
0 vote187 views1 answer
Insert ip address in mysql
SQL