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Perform mathematical calculations in a MySQL table with NULL and NON-NULL values
For this, you can use IFNULL() and perform mathematical calculations with NULL and NON-NULL values. Let us first create a table −
mysql> create table DemoTable1462 -> ( -> Value1 int, -> Value2 int -> ); Query OK, 0 rows affected (0.55 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1462 values(10,20); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1462 values(50,NULL); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1462 values(NULL,70); Query OK, 1 row affected (0.25 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable1462;
This will produce the following output −
+--------+--------+ | Value1 | Value2 | +--------+--------+ | 10 | 20 | | 50 | NULL | | NULL | 70 | +--------+--------+ 3 rows in set (0.00 sec)
Following is the query to perform mathematical calculations in a MySQL table with NULL and NON-NULL values −
mysql> select ifnull(Value1,0)+ifnull(Value2,0) from DemoTable1462;
This will produce the following output −
+-----------------------------------+ | ifnull(Value1,0)+ifnull(Value2,0) | +-----------------------------------+ | 30 | | 50 | | 70 | +-----------------------------------+ 3 rows in set (0.00 sec)
Updated on: 10-Dec-2019
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