Oracle sql delete clause

A table or view, which must be accessible when you execute the DELETE statement, and for which you must have DELETE privileges. TABLE (subquery2) The operand of TABLE is a SELECT statement that returns a single column value, which must be a nested table. This clause lets you return values from deleted columns, and thereby eliminate the need to issue a SELECT statement following the DELETE statement.

The returning clause retrieves the rows affected by a DML statement. You can specify this clause for tables and materialized views and for views with a single base table. You can find out how many rows were delete but this is not the same as a result set.

D) Oracle DELETE – delete cascade. In practice, you often delete a row from a table which has a foreign key relationship with rows from other tables. For example, you want to delete the sales order with id from the orders table and also delete all the line items associated with the order id from the order_items table. Example - DELETE Statement with more than One Condition. FROM customers WHERE customers.

You can have more than one condition in a DELETE statement in SQL using either the AND condition or the OR condition. The AND condition allows you to delete a record if all of the conditions are met. The OR condition deletes a record if any one of the conditions are met.

A WHERE clause is used to specify the criteria, and any rows matching this criteria will be deleted. You can use it to delete a single recor multiple records, or all records in a table. We can delete several rows or records all at once, as well as delete all records in a table. In this article, we look at examples of using th. The DELETE ANY TABLE system privilege also allows you to delete rows from any table or table partition or from the base table of any view.

To delete rows from an object on a remote database, you must also have the READ or SELECT object privilege on the object. How Can I Write a DELETE Query in SQL ? I then check SQL ROWCOUNT and update relatively_small_table setting the processed flag to done. Is there anyway that I can use a RETURNING clause to give me the ROWIDs from relatively_small_table in the above DELETE statement? Optimal way to DELETE specified rows from Oracle.

Ask Question Asked years, months ago. Active years, months ago. Viewed 104k times 15. I have a project that needs to occasionally delete several tens of thousands of rows from one of six tables. In Oracle 9i only the INSERT and UPDATE parts were supporte in Oracle 10g DELETE was added.

The merge_update_ clause and merge_insert_ clause became optional. The basic syntax for the MERGE statement : DELETE can only occur in the merge_update_ clause of the above schema.

This means that it must occur in the WHEN MATCHED THEN clause. How to write a SQL DELETE statement with a SELECT statement in the WHERE clause ? Database: Sybase Advantage 11. On my quest to normalize data, I am trying to delete. I was writing a script to try to figure out which tables a given stored procedure modifies (but does not drop), e.