Display records with more than two occurrences in MySQL?

For this, you can use GROUP BY HAVING clause. Let us first create a table −

mysql> create table DemoTable    -> (    -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> Subject varchar(100)    -> ); Query OK, 0 rows affected (0.53 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable(Subject) values('MySQL'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(Subject) values('MongoDB'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable(Subject) values('MySQL'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(Subject) values('Java'); Query OK, 1 row affected (0.56 sec) mysql> insert into DemoTable(Subject) values('SQL Server'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(Subject) values('MongoDB'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(Subject) values('MySQL'); Query OK, 1 row affected (0.48 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

Output

+----+------------+ | Id | Subject    | +----+------------+ | 1  | MySQL     | | 2  | MongoDB | | 3  | MySQL | | 4  | Java | | 5  | SQL Server | | 6  | MongoDB | | 7  | MySQL | +----+------------+ 7 rows in set (0.00 sec)

Following is the query to display distinct records with more than 2 occurrences in MySQL.

mysql> select Subject,count(Subject) freq from DemoTable -> group by Subject -> having count(Subject) > 2;

Output

+---------+------+ | Subject | freq | +---------+------+ | MySQL | 3 | +---------+------+ 1 row in set (0.00 sec)