Implement two conditions for a single column in MySQL for null and empty value

Let us first create a table −

mysql> create table DemoTable635(    EmployeId int NOT NULL AUTO_INCREMENT PRIMARY KEY,EmployeeName varchar(100) ); Query OK, 0 rows affected (1.24 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable635(EmployeeName) values('John'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable635(EmployeeName) values('Sam'); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable635(EmployeeName) values(''); Query OK, 1 row affected (0.38 sec) mysql> insert into DemoTable635(EmployeeName) values(null); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable635(EmployeeName) values('David'); Query OK, 1 row affected (0.22 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable635;

This will produce the following output −

+-----------+--------------+ | EmployeId | EmployeeName | +-----------+--------------+ |         1 | John         | |         2 | Sam          | |         3 |              | |         4 | NULL         | |         5 | David        | +-----------+--------------+ 5 rows in set (0.00 sec)

Following is the query to avoid displaying empty and null value from a MySQL column −

mysql> select *from DemoTable635 tbl where tbl.EmployeeName is not null and tbl.EmployeeName <> '';

This will produce the following output −

+-----------+--------------+ | EmployeId | EmployeeName | +-----------+--------------+ | 1 | John | | 2 | Sam | | 5 | David | +-----------+--------------+ 3 rows in set (0.02 sec)