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How can I select only those rows where first digit is a number from 0 to 9 in MySQL?
To select only those rows where first digit is a number from 0 to 9, use RLIKE.
Following is the syntax −
select *from yourTableName where yourColumnName RLIKE '^[0-9]+'
Let us first create a table −
mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, QuestionNumber varchar(200) ); Query OK, 0 rows affected (0.56 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable(QuestionNumber) values('1Question');
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable(QuestionNumber) values('Question2');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable(QuestionNumber) values('311Question');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable(QuestionNumber) values('45Question');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable(QuestionNumber) values('Question10');
Query OK, 1 row affected (0.13 sec)Following is the query to display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+----+----------------+ | Id | QuestionNumber | +----+----------------+ | 1 | 1Question | | 2 | Question2 | | 3 | 311Question | | 4 | 45Question | | 5 | Question10 | +----+----------------+ 5 rows in set (0.00 sec)
Here is the query to select only those rows where first digit is a number from 0 to 9 −
mysql> select *from DemoTable where QuestionNumber RLIKE '^[0-9]+';
This will produce the following output −
+----+----------------+ | Id | QuestionNumber | +----+----------------+ | 1 | 1Question | | 3 | 311Question | | 4 | 45Question | +----+----------------+ 3 rows in set (0.03 sec)
Updated on: 30-Jul-2019
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