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How to use user variables in MySQL LIKE clause?
Using the CONCAT() function, we can work with user variables in LIKE clause. The syntax is as follows.
set @anyVariableName='anyValue';
select yourColumnName1,yourColumnName2,yourColumnName3,...N from yourTableName
whereyourColumnName like CONCAT('%', @anyVariableName, '%');To understand the above syntax, let us first create a table. The query to create a table is as follows.
mysql> create table UserVariableInLike -> ( -> id int, -> Name varchar(100), -> Age int -> ); Query OK, 0 rows affected (0.83 sec)
Insert records in the table using insert command. The query is as follows.
mysql> insert into UserVariableInLike values(101,'John',23); Query OK, 1 row affected (0.23 sec) mysql> insert into UserVariableInLike values(102,'John Smith',24); Query OK, 1 row affected (0.20 sec) mysql> insert into UserVariableInLike values(103,'Carol Smith',23); Query OK, 1 row affected (0.15 sec) mysql> insert into UserVariableInLike values(104,'Johnson',25); Query OK, 1 row affected (0.20 sec) mysql> insert into UserVariableInLike values(105,'Adam Smith',26); 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 UserVariableInLike;
The following is the output.
+------+-------------+------+ | id | Name | Age | +------+-------------+------+ | 101 | John | 23 | | 102 | John Smith | 24 | | 103 | Carol Smith | 23 | | 104 | Johnson | 25 | | 105 | Adam Smith | 26 | +------+-------------+------+ 5 rows in set (0.00 sec)
Here is the query which uses the user variable in the LIKE clause. The query is as follows −
mysql> set @searchName='John';
Query OK, 0 rows affected (0.00 sec)
mysql> select id,Name,Age from UserVariableInLike where Name like CONCAT('%',
@searchName, '%');The following is the output.
+------+------------+------+ | id | Name | Age | +------+------------+------+ | 101 | John | 23 | | 102 | JohnSmith | 24 | | 104 | Johnson | 25 | +------+------------+------+ 3 rows in set (0.05 sec)
Updated on: 29-Jun-2020
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