Updating multiple rows in oracle
Some examples of DDL can be can be one condition, or multiple, dependent on what you need. be that you want to update just customers that are located in one area of the world.
But, the syntax example above might not show the whole truth, since we can have a situation like this: In the expanded version of our UPDATE syntax above, the value that we want to update column1 with, actually comes from a different table.
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Oracle Tutorials Oracle Tutorials - Update Values on Multiple Rows By: (Continued from previous topic...) How To Update Values on Multiple Rows?
You can use this method to update multiple records, but you still need to step through each record and click on the field to update the record.
This can be cumbersome if you have multiple records.
This rule allows you to update values on multiple rows in a single UPDATE statement.
These tables were both filled a few columns at the time to achieve the goal.
Anyhow, in this example, let’s pretend we are going to build a summarized table with order totals for our customers.
Let’s create a table: UPDATE customer_order_total cot SET cot.postal_code = ( SELECT c.cust_address.postal_code FROM oe.customers c WHERE c.customer_id = cot.customer_id ), cot.country_code = ( SELECT c.cust_address.country_id FROM oe.customers c WHERE c.customer_id = cot.customer_id ) ; UPDATE customer_order_total cot SET ( cot.postal_code, cot.country_code ) = ( SELECT c.cust_address.postal_code, c.cust_address.country_id FROM oe.customers c WHERE c.customer_id = cot.customer_id ) ; In the update statement above, you need to make sure that you specify the (in this case) the unique identifier in the customer table that matches the customer id in our customer_order_total table.
Actually, if you mess up on the WHERE line in the last query, you will end up getting the following error message: “ TJ Abrahamsen is the founder and author of Oracle Coder. His expertise is with Oracle SQL, PL/SQL, and the latest years Java against Oracle databases.