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How to check the column values have string or digits in MySQL?
If you want only the string values, then use the below syntax −
select *from yourTableName where yourColumnName NOT regexp '^[0-9]+$';
If you want only the digit, then use the below syntax −
select *from yourTableName where yourColumnName regexp '^[0-9]+$';
Let us first create a table −
mysql> create table DemoTable( Id varchar(100) ); Query OK, 0 rows affected (0.49 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values('1000');
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable values('John');
Query OK, 1 row affected (0.10 sec)
mysql> insert into DemoTable values('Carol_Smith');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable values('2000');
Query OK, 1 row affected (0.10 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+-------------+ | Id | +-------------+ | 1000 | | John | | Carol_Smith | | 2000 | +-------------+ 4 rows in set (0.00 sec)
CASE 1 − Following is the query to get only the string value −
mysql> select *from DemoTable where Id NOT regexp '^[0-9]+$';
This will produce the following output displaying only the string column values −
+-------------+ | Id | +-------------+ | John | | Carol_Smith | +-------------+ 2 rows in set (0.00 sec)
CASE 2 − Following is the query to get only the digits −
mysql> select *from DemoTable where Id regexp '^[0-9]+$';
This will produce the following output displaying only the digit column values −
+------+ | Id | +------+ | 1000 | | 2000 | +------+ 2 rows in set (0.00 sec)
Updated on: 04-Oct-2019
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