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Implement MySQL query using multiple OR statements. Any optimal alternative?
It would be good to use IN() instead of multiple OR statements. Let us first create a table −
mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> FirstName varchar(20) -> ); Query OK, 0 rows affected (0.83 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable(FirstName) values('John');
Query OK, 1 row affected (0.12 sec)
mysql> insert into DemoTable(FirstName) values('Adam');
Query OK, 1 row affected (0.27 sec)
mysql> insert into DemoTable(FirstName) values('David');
Query OK, 1 row affected (0.09 sec)
mysql> insert into DemoTable(FirstName) values('Mike');
Query OK, 1 row affected (0.48 sec)
mysql> insert into DemoTable(FirstName) values('Bob');
Query OK, 1 row affected (0.09 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+----+-----------+ | Id | FirstName | +----+-----------+ | 1 | John | | 2 | Adam | | 3 | David | | 4 | Mike | | 5 | Bob | +----+-----------+ 5 rows in set (0.00 sec)
Here is the query for using IN() −
mysql> select *from DemoTable where Id IN(2,3,5);
This will produce the following output −
+----+-----------+ | Id | FirstName | +----+-----------+ | 2 | Adam | | 3 | David | | 5 | Bob | +----+-----------+ 3 rows in set (0.00 sec)
Updated on: 13-Dec-2019
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