Insert values from the first table to the second table using two SELECT statements in a single MySQL query

To insert values from the first table to another table using two SELECT statements, use SUBQUERY. This will allow you to use only a single MySQL query to get the result in the second table. Let us first create a table −

mysql> create table DemoTable1 (    Name varchar(100),    Score int ); Query OK, 0 rows affected (1.30 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable1 values('Chris',45); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1 values('Bob',78); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1 values('David',98); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1 values('Carol',89); Query OK, 1 row affected (0.15 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable1;

This will produce the following output −

+-------+-------+ | Name | Score | +-------+-------+ | Chris | 45 | | Bob | 78 | | David | 98 | | Carol | 89 | +-------+-------+ 4 rows in set (0.00 sec)

Following is the query to create the second table.

mysql> create table DemoTable2 (    StudentName varchar(100),    StudentScore int ); Query OK, 0 rows affected (0.58 sec)

Let us now write a MySQL query to insert values from the first table to the second table using two SELECT statements −

mysql> insert into DemoTable2(StudentName,StudentScore) values((select Name from DemoTable1 where Score=98),(select Score from DemoTable1 where Name='David')); Query OK, 1 row affected (0.30 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable2; +-------------+--------------+ | StudentName | StudentScore | +-------------+--------------+ | David | 98 | +-------------+--------------+ 1 row in set (0.00 sec)