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Can I get the count of repeated values in a column with MySQL?
Yes, you can use ORDER BY DESC with GROUP BY. Let us first create a table −
mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> PostMessage varchar(100) -> ); Query OK, 0 rows affected (0.69 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable(PostMessage) values('Hi');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable(PostMessage) values('Hello');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable(PostMessage) values('Hi');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable(PostMessage) values('Awesome');
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable(PostMessage) values('Hello');
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable(PostMessage) values('Hi');
Query OK, 1 row affected (0.09 sec)
mysql> insert into DemoTable(PostMessage) values('Awesome');
Query OK, 1 row affected (0.33 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
Output
This will produce the following output −
+----+-------------+ | Id | PostMessage | +----+-------------+ | 1 | Hi | | 2 | Hello | | 3 | Hi | | 4 | Awesome | | 5 | Hello | | 6 | Hi | | 7 | Awesome | +----+-------------+ 7 rows in set (0.00 sec)
Following is the query to get the highest amount of a value in a MySQL database −
mysql> select PostMessage,count(Id) from DemoTable group by PostMessage -> order by count(Id) DESC;
Output
This will produce the following output −
+-------------+-----------+ | PostMessage | count(Id) | +-------------+-----------+ | Hi | 3 | | Hello | 2 | | Awesome | 2 | +-------------+-----------+ 3 rows in set (0.00 sec)
If you want only highest, you can use the following query −
mysql> select PostMessage,count(Id) from DemoTable group by PostMessage having count(Id) > 2;
Output
This will produce the following output −
+-------------+-----------+ | PostMessage | count(Id) | +-------------+-----------+ | Hi | 3 | +-------------+-----------+ 1 row in set (0.00 sec)
Updated on: 30-Jun-2020
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