Comparing two strings in MySQL?

To compare two strings, which are numbers, let us first create a table. Following is the query −

mysql> create table compareTwoStringsDemo    -> (    -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    -> Value varchar(100)    -> ); Query OK, 0 rows affected (0.52 sec)

Following is the query to insert some records in the table using insert command −

mysql> insert into compareTwoStringsDemo(Value) values('1235667'); Query OK, 1 row affected (0.66 sec) mysql> insert into compareTwoStringsDemo(Value) values('999999'); Query OK, 1 row affected (0.11 sec) mysql> insert into compareTwoStringsDemo(Value) values('999888'); Query OK, 1 row affected (0.17 sec) mysql> insert into compareTwoStringsDemo(Value) values('567433'); mysql> insert into compareTwoStringsDemo(Value) values('567433'); Query OK, 1 row affected (0.23 sec) mysql> insert into compareTwoStringsDemo(Value) values('2345123'); 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 compareTwoStringsDemo;

This will produce the following output −

+----+---------+ | Id | Value | +----+---------+ | 1 | 1235667 | | 2 | 999999 | | 3 | 999888 | | 4 | 567433 | | 5 | 2345123 | +----+---------+ 5 rows in set (0.00 sec)

Following is the query to compare two strings which are numbers −

mysql> select *from compareTwoStringsDemo -> where cast(Value as signed) = 999999;

This will produce the following output. The record with the matching string gets displayed −

+----+--------+ | Id | Value | +----+--------+ | 2 | 999999 | +----+--------+ 1 row in set (0.00 sec)