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 vote149 views1 answer
Automatically update database last seen datetime in sql
SQL
0 vote145 views1 answer
Show function mysql
SQL
7 votes164 views1 answer
Sql pagination oracle
SQL
6 votes159 views3 answers
Check if string contains substring sql
SQL
0 vote153 views1 answer
Postgresql get diff between two dates in Months
SQL
0 vote155 views1 answer
Sql ignore
SQL
1 vote167 views1 answer
Postgresql not in
SQL
14 votes151 views2 answers
Oracle export trigger ddl
SQL
6 votes230 views2 answers
Non relational database
SQL
0 vote168 views1 answer
Python sqlalchemy connection show server
SQL