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How to implement GROUP by range in MySQL?
To group by range in MySQL, let us first create a table. The query to create a table is as follows
mysql> create table GroupByRangeDemo - > ( - > Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, - > YourRangeValue int - > ); Query OK, 0 rows affected (0.78 sec)
Now you can insert some records in the table using insert command.
The query is as follows
mysql> insert into GroupByRangeDemo(YourRangeValue) values(1); Query OK, 1 row affected (0.14 sec) mysql> insert into GroupByRangeDemo(YourRangeValue) values(7); Query OK, 1 row affected (0.15 sec) mysql> insert into GroupByRangeDemo(YourRangeValue) values(9); Query OK, 1 row affected (0.14 sec) mysql> insert into GroupByRangeDemo(YourRangeValue) values(23); Query OK, 1 row affected (0.13 sec) mysql> insert into GroupByRangeDemo(YourRangeValue) values(33); Query OK, 1 row affected (0.15 sec) mysql> insert into GroupByRangeDemo(YourRangeValue) values(35); Query OK, 1 row affected (0.16 sec) mysql> insert into GroupByRangeDemo(YourRangeValue) values(1017); Query OK, 1 row affected (0.11 sec)
Display all records from the table using select statement.
The query is as follows
mysql> select *from GroupByRangeDemo;
The following is the output
+----+----------------+ | Id | YourRangeValue | +----+----------------+ | 1 | 1 | | 2 | 7 | | 3 | 9 | | 4 | 23 | | 5 | 33 | | 6 | 35 | | 7 | 1017 | +----+----------------+ 7 rows in set (0.04 sec)
Here is the query to group by range
mysql> select round(YourRangeValue / 10), count(YourRangeValue) from GroupByRangeDemo where YourRangeValue < 40 group by round(YourRangeValue / 10) - > union - > select '40+', count(YourRangeValue) from GroupByRangeDemo where YourRangeValue >= 40;
The following is the output
+----------------------------+-----------------------+ | round(YourRangeValue / 10) | count(YourRangeValue) | +----------------------------+-----------------------+ | 0 | 1 | | 1 | 2 | | 2 | 1 | | 3 | 1 | | 4 | 1 | | 40+ | 1 | +----------------------------+-----------------------+ 6 rows in set (0.08 sec)
Updated on: 30-Jul-2019
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