Select the table name as a column in a UNION select query with MySQL?

You can use AS command for this. Let us first create a table −

mysql> create table DemoTable    (    Name varchar(20)    ); Query OK, 0 rows affected (0.56 sec)

Insert records in the table using insert command −

mysql> insert into DemoTable values('John'); Query OK, 1 row affected (0.18 sec)

Display all records from the table using select statement −

mysql> select * from DemoTable;

This will produce the following output −

+------+ | Name | +------+ | John | +------+ 1 row in set (0.00 sec)

Here is the query to create the second table.

mysql> create table DemoTable2    (    Name varchar(20)    ); Query OK, 0 rows affected (0.59 sec)

Insert records in the table using insert command −

mysql> insert into DemoTable2 values('Bob'); Query OK, 1 row affected (0.20 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable2;

This will produce the following output −

+------+ | Name | +------+ | Bob | +------+ 1 row in set (0.00 sec)

Following is the query to select the table name as a column in a UNION select query in MySQL −

mysql> select 'DemoTable' as DemoTable,Name from DemoTable union select 'DemoTable2' as DemoTable2,Name from DemoTable2 ;

This will produce the following output −

+--------------+------+ | DemoTable | Name | +--------------+------+ | DemoTable | John | | DemoTable2 | Bob | +--------------+------+ 2 rows in set (0.00 sec)