Updating Multiple Rows in PL/SQL

Question

I am trying to update multiple rows in a PLSQL block. Is it possible to update several rows with a single UPDATE statement.
For example, could I use the following code:

UPDATE ORDERTABLE
SET COST = 400 AND SHIPPING = 8, AND TAX = .06;

Is this acceptable?

Answer 1

The syntax of your update is wrong. But it is possible to update more than one row with one statement.

UPDATE ordertable SET
cost = 400, shipping = 8, tax = .06;

This will update all rows in table ordertable. Add some restrictions to change only some rows.

UPDATE ordertable SET
cost = 400, shipping = 8, tax = .06
WHERE cost < 100 OR shipping >9;

Most tools report rows updated as output or feedback. You can check which rows are updated prior running the update, by using the restriction in a select statement.

SELECT * FROM ordertable
WHERE cost < 100 OR shipping >9;

Answer 2

More than one rows cant be updated in a single update statement. Once the update statement is executed you will get output as

n Rows Updated

where n -is the no of rows for which the update statement is executed successfully.

Below code update all the rows of the table

UPDATE ORDERTABLE
SET COST = 400,
    SHIPPING = 8,
    TAX = .06;