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MySQL TINYINT type to return <>1 or IS NULL records
Let us first create a table −
mysql> create table DemoTable -> ( -> EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY , -> EmployeeName varchar(20), -> isMarried tinyint -> ); Query OK, 0 rows affected (0.83 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable(EmployeeName,isMarried) values('Chris',NULL);
Query OK, 1 row affected (0.76 sec)
mysql> insert into DemoTable(EmployeeName,isMarried) values('David',1);
Query OK, 1 row affected (0.35 sec)
mysql> insert into DemoTable(EmployeeName,isMarried) values('Mike',0);
Query OK, 1 row affected (0.69 sec)
mysql> insert into DemoTable(EmployeeName,isMarried) values('Sam',NULL);
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable(EmployeeName,isMarried) values('Bob',0);
Query OK, 1 row affected (0.10 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+------------+--------------+-----------+ | EmployeeId | EmployeeName | isMarried | +------------+--------------+-----------+ | 1 | Chris | NULL | | 2 | David | 1 | | 3 | Mike | 0 | | 4 | Sam | NULL | | 5 | Bob | 0 | +------------+--------------+-----------+ 5 rows in set (0.00 sec)
Here is the query to display records <> 1 or IS NULL −
mysql> select *from DemoTable where isMarried <> 1 or isMarried IS NULL;
This will produce the following output −
+------------+--------------+-----------+ | EmployeeId | EmployeeName | isMarried | +------------+--------------+-----------+ | 1 | Chris | NULL | | 3 | Mike | 0 | | 4 | Sam | NULL | | 5 | Bob | 0 | +------------+--------------+-----------+ 4 rows in set (0.00 sec)
Updated on: 13-Dec-2019
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