Using CREATE TABLE AS statement with UNION of two tables in MySQL
For this, you can use UNION. Let us first create a table −
mysql> create table DemoTable1(FirstName varchar(1000));
Query OK, 0 rows affected (1.22 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1 values('John');
Query OK, 1 row affected (0.20 sec)Display all records from the table using select statement −
mysql> select *from DemoTable1;
This will produce the following output −
+-----------+
| FirstName |
+-----------+
| John |
+-----------+
1 row in set (0.02 sec)
Here is the query to create second the table −
mysql> create table DemoTable2(FirstName varchar(100));
Query OK, 0 rows affected (0.81 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable2 values('Chris');
Query OK, 1 row affected (0.21 sec)Display all records from the table using select statement −
mysql> select *from DemoTable2;
This will produce the following output −
+-----------+
| FirstName |
+-----------+
| Chris |
+-----------+
1 row in set (0.00 sec)
Following is the query for CREATE TABLE AS statement and displaying the union of two or more tables in it −
mysql> create table DemoTable3 AS
(
select FirstName, 'DemoTable1' AS `TABLE_NAME` from DemoTable1)
union
(
select FirstName, 'DemoTable2' AS `TABLE_NAME` from DemoTable2);
Query OK, 2 rows affected (1.08 sec)
Records: 2 Duplicates: 0 Warnings: 0
Display all the records from the table DemoTable3 −
mysql> select *from DemoTable3;
This will produce the following output −
+-----------+--------------+
| FirstName | TABLE_NAME |
+-----------+--------------+
| John | DemoTable1 |
| Chris | DemoTable2 |
+-----------+--------------+
2 rows in set (0.00 sec)
Published on 22-Aug-2019 14:24:03
