Replace the empty values from a MySQL table with a specific value

Let us first create a table −

mysql> create table DemoTable837(Name varchar(100));
Query OK, 0 rows affected (0.53 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable837 values('Chris');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable837 values('');
Query OK, 1 row affected (0.23 sec)
mysql> insert into DemoTable837 values('Robert');
Query OK, 1 row affected (0.08 sec)
mysql> insert into DemoTable837 values('');
Query OK, 1 row affected (0.09 sec)
mysql> insert into DemoTable837 values('David');
Query OK, 1 row affected (1.13 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable837;

This will produce the following output −

+--------+
| Name   |
+--------+
| Chris  |
|        |
| Robert |
|        |
| David  |
+--------+
5 rows in set (0.00 sec)

Following is the query to replace the empty value with a specific value −

mysql> select if(Name='', 'Adam',Name) from DemoTable837;

This will produce the following output −

+--------------------------+
| if(Name='', 'Adam',Name) |
+--------------------------+
| Chris                    |
| Adam                     |
| Robert                   |  
| Adam                     |
| David                    |
+--------------------------+
5 rows in set (0.00 sec)