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 vote327 views1 answer
Update top 100 sql
SQL
0 vote356 views2 answers
How to get the date from datetime in mysql
SQL
0 vote332 views1 answer
Which is the order of precedence among following operator IN OUT AND OR in sql
SQL
0 vote359 views1 answer
SQL division of an integer by another integer get float CAST
SQL
0 vote337 views1 answer
Sqlite closes value
SQL
16 votes425 views2 answers
Sql vs nosql
SQL
15 votes518 views2 answers
Sql order by alphabetical
SQL
0 vote305 views1 answer
Java spring boot connect to sql server
SQL
0 vote371 views1 answer
Mod in sql
SQL
1 vote330 views1 answer
Truncate left characters mysql
SQL