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Display only NOT NULL values from a column with NULL and NOT NULL records in MySQL
For this, you can use IS NOT NULL property. Let us first create a table −
mysql> create table DemoTable1 ( DueDate date ); Query OK, 0 rows affected (0.00 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1 values('2019-09-10');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1 values(NULL);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1 values('2019-11-10');
Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −
mysql> select * from DemoTable1;
This will produce the following output −
+------------+ | DueDate | +------------+ | 2019-09-10 | | NULL | | 2019-11-10 | +------------+ 3 rows in set (0.00 sec)
Here is the query to create second table −
mysql> create table DemoTable2 ( AdmissionDate date ); Query OK, 0 rows affected (0.00 sec)
Here is the query to display only NOT NULL values −
mysql> insert into DemoTable2(AdmissionDate) select DueDate from DemoTable1 where DueDate IS NOT NULL; Query OK, 2 rows affected (0.00 sec) Records: 2 Duplicates: 0 Warnings: 0
Display all records from the table using select statement −
mysql> select * from DemoTable2;
This will produce the following output −
+---------------+ | AdmissionDate | +---------------+ | 2019-09-10 | | 2019-11-10 | +---------------+ 2 rows in set (0.00 sec)
Updated on: 24-Dec-2019
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