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Set a custom value for NULL or empty values in MySQL
Let us first create a table −
mysql> create table DemoTable ( Value varchar(100) ); Query OK, 0 rows affected (0.75 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values('100');
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable values('');
Query OK, 1 row affected (0.09 sec)
mysql> insert into DemoTable values('200');
Query OK, 1 row affected (0.06 sec)
mysql> insert into DemoTable values(null);
Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+-------+ | Value | +-------+ | 100 | | | | 200 | | NULL | +-------+ 4 rows in set (0.00 sec)
Following is the query to set a custom value for NULL or empty values −
mysql> select if(Value IS NULL or Value='','Garbage Value',Value) AS Result from DemoTable;
This will produce the following output −
+---------------+ | Result | +---------------+ | 100 | | Garbage Value | | 200 | | Garbage Value | +---------------+ 4 rows in set (0.00 sec)
Updated on: 30-Sep-2019
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