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)
Published on 13-Dec-2019 10:08:17
