- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- MS Excel
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP
- Physics
- Chemistry
- Biology
- Mathematics
- English
- Economics
- Psychology
- Social Studies
- Fashion Studies
- Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
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)
Advertisements