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Add a new column to table and fill it with the data of two other columns of the same table in MySQL?
Let us first create a table −
mysql> create table DemoTable ( Price int, Quantity int ); Query OK, 0 rows affected (0.71 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values(45,3); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(90,2); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(440,1); Query OK, 1 row affected (0.09 sec)
Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+-------+----------+ | Price | Quantity | +-------+----------+ | 45 | 3 | | 90 | 2 | | 440 | 1 | +-------+----------+ 3 rows in set (0.00 sec)
Following is the query to add a new column to the table and fill with the data of 2 other columns. Here, we have added new column TotalAmount and the data in it is the multiplication of the values from the first two columns −
mysql> select Price,Quantity, Price*Quantity AS TotalAmount from DemoTable;
This will produce the following output −
+-------+----------+-------------+ | Price | Quantity | TotalAmount | +-------+----------+-------------+ | 45 | 3 | 135 | | 90 | 2 | 180 | | 440 | 1 | 440 | +-------+----------+-------------+ 3 rows in set (0.00 sec)
Updated on: 30-Sep-2019
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