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
Can we use a comma between MySQL SELECT statements?
Yes, we can do that. The syntaxes are as follows −
Syntax1: select * from yourTableName1,yourTableName2; Syntax2: select * from yourTableName1 cross join yourTableName2;
Both the above syntaxes give the same result.
Let us first create a table −
mysql> create table DemoTable1882 ( Id int ); Query OK, 0 rows affected (0.00 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1882 values(10); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1882 values(20); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1882 values(30); Query OK, 1 row affected (0.00 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable1882;
This will produce the following output −
+------+ | Id | +------+ | 10 | | 20 | | 30 | +------+ 3 rows in set (0.00 sec)
Here is the query to create second table −
mysql> create table DemoTable1883 ( Id int ); Query OK, 0 rows affected (0.00 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1883 values(100); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1883 values(101); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1883 values(102); Query OK, 1 row affected (0.00 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable1883;
This will produce the following output −
+------+ | Id | +------+ | 100 | | 101 | | 102 | +------+ 3 rows in set (0.00 sec)
Here is the query to use a comma between SELECT statements −
mysql> select * from DemoTable1882,DemoTable1883;
This will produce the following output −
+------+------+ | Id | Id | +------+------+ | 10 | 100 | | 20 | 100 | | 30 | 100 | | 10 | 101 | | 20 | 101 | | 30 | 101 | | 10 | 102 | | 20 | 102 | | 30 | 102 | +------+------+ 9 rows in set (0.00 sec)
Here is the second query to get the same result like comma between SELECT statements −
mysql> select * from DemoTable1882 cross join DemoTable1883;
This will produce the following output −
+------+------+ | Id | Id | +------+------+ | 10 | 100 | | 20 | 100 | | 30 | 100 | | 10 | 101 | | 20 | 101 | | 30 | 101 | | 10 | 102 | | 20 | 102 | | 30 | 102 | +------+------+ 9 rows in set (0.00 sec)
Updated on: 27-Dec-2019
104 Views
Advertisements