The binary keyword can be used after WHERE clause to compare a value with exact case sensitive match.
The following is an example −
Case 1 − Case insensitive match
The query is as follows −
mysql> select 'joHN'='JOHN' as Result;
The following is the output −
+--------+ | Result | +--------+ | 1 | +--------+ 1 row in set (0.00 sec)
In the above sample output, the result is true while we know joHN and JOHN are two different words. This is not a case sensitive match.
Case 2 − If you want case sensitive match, use the binary keyword.
The query is as follows −
mysql> select binary 'joHN'='JOHN' as Result;
The following is the output −
+--------+ | Result | +--------+ | 0 | +--------+ 1 row in set (0.00 sec)
Let us now see another query −
mysql> select binary 'JOHN'='JOHN' as Result;
The following is the output −
+--------+ | Result | +--------+ | 1 | +--------+ 1 row in set (0.00 sec)
NOTE − You can use binary keyword to make your column case sensitive with the help of binary keyword whenever you create a table.
To understand the above concept, let us create a table. The query to create a table is as follows −
mysql> create table binaryKeywordDemo -> ( -> Id int NOT NULL AUTO_INCREMENT, -> Name varchar(10) binary, -> PRIMARY KEY(Id) -> ); Query OK, 0 rows affected (0.88 sec)
Insert some records in the table using INSERT command. The query is as follows −
mysql> insert into binaryKeywordDemo(Name) values('bOB');
Query OK, 1 row affected (0.15 sec)
mysql> insert into binaryKeywordDemo(Name) values('bob');
Query OK, 1 row affected (0.13 sec)
mysql> insert into binaryKeywordDemo(Name) values('BOB');
Query OK, 1 row affected (0.18 sec)
mysql> insert into binaryKeywordDemo(Name) values('Bob');
Query OK, 1 row affected (0.18 sec)
mysql> insert into binaryKeywordDemo(Name) values('bOb');
Query OK, 1 row affected (0.15 sec)
mysql> insert into binaryKeywordDemo(Name) values('boB');
Query OK, 1 row affected (0.21 sec)Display all records from the table using select statement. The query is as follows −
mysql> select *from binaryKeywordDemo;
The following is the output −
+----+------+ | Id | Name | +----+------+ | 1 | bOB | | 2 | bob | | 3 | BOB | | 4 | Bob | | 5 | bOb | | 6 | boB | +----+------+ 6 rows in set (0.00 sec)
The following is the query to exact match like case sensitive −
mysql> select *from binaryKeywordDemo where Name='Bob';
Here is the output −
+----+------+ | Id | Name | +----+------+ | 4 | Bob | +----+------+ 1 row in set (0.00 sec)