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MySQL query to order by the first number in a set of numbers?
To order by the first number in a set of numbers, use ORDER BY SUBSTRING_INDEX(). Let us first create a table −
mysql> create table DemoTable ( SetOfNumbers text ); Query OK, 0 rows affected (0.53 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values('245,654,76,89,98');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable values('2000,567,9090,6789');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable values('1001,90595,657,99');
Query OK, 1 row affected (0.20 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+--------------------+ | SetOfNumbers | +--------------------+ | 245,654,76,89,98 | | 2000,567,9090,6789 | | 1001,90595,657,99 | +--------------------+ 3 rows in set (0.00 sec)
Following is the query to order by the first number in a set of numbers −
mysql> select *from DemoTable order by cast(substring_index(SetOfNumbers,',',1) as unsigned);
This will produce the following output −
+--------------------+ | SetOfNumbers | +--------------------+ | 245,654,76,89,98 | | 1001,90595,657,99 | | 2000,567,9090,6789 | +--------------------+ 3 rows in set (0.00 sec)
Updated on: 27-Sep-2019
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