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Filtering data in a table for a required condition to eliminate a specific record with MySQL
For this, you can use NOT LIKE operator. Let us first create a table −
mysql> create table DemoTable -> ( -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentName varchar(20), -> StudentAdmissionYear varchar(20) -> ); Query OK, 0 rows affected (1.22 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable(StudentName,StudentAdmissionYear) values('Chris','2017');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable(StudentName,StudentAdmissionYear) values('David','2015');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable(StudentName,StudentAdmissionYear) values('Bob','2019');
Query OK, 1 row affected (0.18 sec)
mysql> insert into DemoTable(StudentName,StudentAdmissionYear) values('Carol','2015');
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable(StudentName,StudentAdmissionYear) values('Sam','2018');
Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+-----------+-------------+----------------------+ | StudentId | StudentName | StudentAdmissionYear | +-----------+-------------+----------------------+ | 1 | Chris | 2017 | | 2 | David | 2015 | | 3 | Bob | 2019 | | 4 | Carol | 2015 | | 5 | Sam | 2018 | +-----------+-------------+----------------------+ 5 rows in set (0.00 sec)
Following is the query to filter data in a table for a required condition to eliminate a specific record −
mysql> select *from DemoTable -> where StudentAdmissionYear not like '%2015%';
This will produce the following output. Here, we have eliminated records with StudentAdmissionYear 2015 −
+-----------+-------------+----------------------+ | StudentId | StudentName | StudentAdmissionYear | +-----------+-------------+----------------------+ | 1 | Chris | 2017 | | 3 | Bob | 2019 | | 5 | Sam | 2018 | +-----------+-------------+----------------------+ 3 rows in set (0.04 sec)
Updated on: 12-Dec-2019
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