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Get only digits using regexp in MySQL?
If you want to get only digits using REGEXP, use the following regular expression( ^[0-9]*$) in where clause.
Case 1 − If you want only those rows which have exactly 10 digits and all must be only digit, use the below regular expression.
SELECT *FROM yourTableName
WHERE yourColumnName REGEXP '^[0-9]{10}$';Case 2 − If you want only those rows with the digit either 1 or more, the following is the syntax −
SELECT *FROM yourTableName WHERE yourColumnName REGEXP '^[0-9]*$';
The above syntax will give only those rows that do not have any any characters.
To understand the above syntax, let us create a table. The query to create a table is as follows −
mysql> insert into OnlyDigits(UserId, UserName) values('123User1','John');
Query OK, 1 row affected (0.16 sec)
mysql> insert into OnlyDigits(UserId, UserName) values('3445User2','Carol');
Query OK, 1 row affected (0.19 sec)
mysql> insert into OnlyDigits(UserId, UserName) values('145363User3','Mike');
Query OK, 1 row affected (0.20 sec)
mysql> insert into OnlyDigits(UserId, UserName) values('13455User4','Larry');
Query OK, 1 row affected (0.22 sec)
mysql> insert into OnlyDigits(UserId, UserName) values('123555User5','Sam');
Query OK, 1 row affected (0.15 sec)
mysql> insert into OnlyDigits(UserId, UserName) values('596766User6','David');
Query OK, 1 row affected (0.24 sec)
mysql> insert into OnlyDigits(UserId, UserName) values('96977User7','Robert');
Query OK, 1 row affected (0.15 sec)
mysql> insert into OnlyDigits(UserId, UserName) values('99999User8','James');
Query OK, 1 row affected (0.20 sec)
mysql> insert into OnlyDigits(UserId, UserName) values('9999999','James');
Query OK, 1 row affected (0.13 sec)
mysql> insert into OnlyDigits(UserId, UserName) values('153545','Maxwell');
Query OK, 1 row affected (0.23 sec)
mysql> insert into OnlyDigits(UserId, UserName) values('9999986787','Johnson');
Query OK, 1 row affected (0.20 sec)Now you can display all records from the table using select statement. The query is as follows −
mysql> select *from OnlyDigits;
The following is the output −
+----+-------------+----------+ | Id | UserId | UserName | +----+-------------+----------+ | 1 | 123User1 | John | | 2 | 3445User2 | Carol | | 3 | 145363User3 | Mike | | 4 | 13455User4 | Larry | | 5 | 123555User5 | Sam | | 6 | 596766User6 | David | | 7 | 96977User7 | Robert | | 8 | 99999User8 | James | | 9 | 9999999 | James | | 10 | 153545 | Maxwell | | 11 | 9999986787 | Johnson | +----+-------------+----------+ 11 rows in set (0.00 sec)
Case 1 − The following is the query with regex when you want exactly 10 digits in a string and all must be a number:
mysql> select *from OnlyDigits
-> where UserId REGEXP '^[0-9]{10}$';The following is the output −
+----+------------+----------+ | Id | UserId | UserName | +----+------------+----------+ | 11 | 9999986787 | Johnson | +----+------------+----------+ 1 row in set (0.00 sec)
Alternate regular expression of case 1. The query is as follows:
mysql> select *from OnlyDigits
-> where UserId REGEXP '^[[:digit:]]{10}$';The following is the output −
+----+------------+----------+ | Id | UserId | UserName | +----+------------+----------+ | 11 | 9999986787 | Johnson | +----+------------+----------+ 1 row in set (0.00 sec)
Case 2 − If you want only those rows with the one or more digit (Only the digits). The query is as follows:
mysql> select *from OnlyDigits -> where UserId REGEXP'^[0-9]*$';
The following is the output:
+----+------------+----------+ | Id | UserId | UserName | +----+------------+----------+ | 9 | 9999999 | James | | 10 | 153545 | Maxwell | | 11 | 9999986787 | Johnson | +----+------------+----------+ 3 rows in set (0.00 sec)
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