Display the result with not null value first and then with null value in MySQL


Let us first create a table −

mysql> create table DemoTable1357
    -> (
    -> StudentName varchar(40),
    -> StudentCountryName varchar(30)
    -> );
Query OK, 0 rows affected (0.49 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable1357 values('Chris','US');
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable1357 values('David',NULL);
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable1357 values('David','AUS');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable1357 values('Carol',NULL);
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable1357 values('Mike','UK');
Query OK, 1 row affected (0.15 sec)

Display all records from the table using select statement −

mysql> select * from DemoTable1357;

This will produce the following output −

+-------------+--------------------+
| StudentName | StudentCountryName |
+-------------+--------------------+
| Chris       | US                 |
| David       | NULL               |
| David       | AUS                |
| Carol       | NULL               |
| Mike        | UK                 |
+-------------+--------------------+
5 rows in set (0.00 sec)

Following is the query to display the result with not null value first and then with null value −

mysql> select * from DemoTable1357
    -> order by (StudentCountryName IS NULL),StudentName;

This will produce the following output −

+-------------+--------------------+
| StudentName | StudentCountryName |
+-------------+--------------------+
| Chris       | US                 |
| David       | AUS                |
| Mike        | UK                 |
| Carol       | NULL               |
| David       | NULL               |
+-------------+--------------------+
5 rows in set (0.00 sec)
raja
Published on 05-Nov-2019 10:18:06
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