MySQL query for INSERT INTO using values from another table?

For this, use INSERT INTO SELECT statement.

Let us create a table −

Example

mysql> create table demo82
   -> (
   -> id int,
   -> name varchar(20)
   -> );
Query OK, 0 rows affected (2.06

Insert some records into the table with the help of insert command −

Example

mysql> insert into demo82 values(100,'John');
Query OK, 1 row affected (0.14

mysql> insert into demo82 values(101,'Bob');
Query OK, 1 row affected (0.32

mysql> insert into demo82 values(101,'David');
Query OK, 1 row affected (0.09

mysql> insert into demo82 values(101,'Mike');
Query OK, 1 row affected (0.12

mysql> insert into demo82 values(100,'Sam');
Query OK, 1 row affected (0.07

Display records from the table using select statement −

Example

mysql> select *from demo82;

This will produce the following output −

Output

+------+-------+
| id   | name  |
+------+-------+
|  100 | John  |
|  101 | Bob   |
|  101 | David |
|  101 | Mike  |
|  100 | Sam   |
+------+-------+
5 rows in set (0.00 sec)

Following is the query to create second table.

Example

mysql> create table demo83
   -> (
   -> id int,
   -> username varchar(20)
   -> );
Query OK, 0 rows affected (1.25

Insert some records into the second table with the help of insert command −

Example

mysql> insert into demo83(id,username)
   -> select id,name from demo82 where id=101;
Query OK, 3 rows affected (0.14 sec)
Records: 3 Duplicates: 0 Warnings: 0

Display records from the second table using select statement −

Example

mysql> select *from demo83;

This will produce the following output −

Output

+------+----------+
| id   | username |
+------+----------+
|  101 | Bob      |
|  101 | David    |
|  101 | Mike     |
+------+----------+
3 rows in set (0.00 sec)

AmitDiwan

Published on 11-Dec-2020 05:41:54

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