- 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
How to return rows that have the same column values in MySQL?
Use GROUP BY clause for this. Let us first create a table −
mysql> create table DemoTable -> ( -> StudentId int, -> StudentMarks int -> ); Query OK, 0 rows affected (4.71 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values(23,58); Query OK, 1 row affected (0.70 sec) mysql> insert into DemoTable values(25,89); Query OK, 1 row affected (0.46 sec) mysql> insert into DemoTable values(26,58); Query OK, 1 row affected (1.13 sec) mysql> insert into DemoTable values(28,98); Query OK, 1 row affected (0.86 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable;
Output
+-----------+--------------+ | StudentId | StudentMarks | +-----------+--------------+ | 23 | 58 | | 25 | 89 | | 26 | 58 | | 28 | 98 | +-----------+--------------+ 4 rows in set (0.00 sec)
Here is the query to return rows that have the same column values in MySQL −
mysql> select StudentMarks from DemoTable -> group by StudentMarks -> having sum(StudentId=23) > 0 and -> sum(StudentId=26) > 0;
Output
+--------------+ | StudentMarks | +--------------+ | 58 | +--------------+ 1 row in set (0.00 sec)
Advertisements
To Continue Learning Please Login
Login with Google