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MySQL query to count the number of times a specific integer appears in a column for its corresponding value in another column
For this, use aggregate function COUNT(). Let us first create a table −
mysql> create table DemoTable650 (Value1 int,Value2 int); Query OK, 0 rows affected (0.83 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable650 values(100,500); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable650 values(100,500); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable650 values(100,500); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable650 values(100,500); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable650 values(200,500); Query OK, 1 row affected (0.12 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable650;
This will produce the following output −
+--------+--------+ | Value1 | Value2 | +--------+--------+ | 100 | 500 | | 100 | 500 | | 100 | 500 | | 100 | 500 | | 200 | 500 | +--------+--------+ 5 rows in set (0.00 sec)
Following is the query to count the number of times a specific integer appears in a column for its corresponding value in another column −
mysql> select Value2,count(Value1) from DemoTable650 where Value1=100 group by Value2;
This will produce the following output −
+--------+---------------+ | Value2 | count(Value1) | +--------+---------------+ | 500 | 4 | +--------+---------------+ 1 row in set (0.04 sec)
Updated on: 23-Aug-2019
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