Database Oracle How to specify the WHERE clause for UPDATE / DELETE Tutorial

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Tutorial: Database Oracle How to specify the WHERE clause for UPDATE / DELETE Tutorial

Sometimes multiple users are accessing the same tables at the same time. In these situations, you need to decide when to allow your application to update the database. If you allow your application to always update the database it could overwrite changes

Tutorial Details:

How to specify the WHERE clause for UPDATE / DELETE ?

Sometimes multiple users are accessing the same tables at the same time . In these situations, you need to decide when to allow your application to update the database. If you allow your application to always update the database it could overwrite changes made by other users. You can control when updates succeed by specifying which columns are included in the WHERE clause of an UPDATE or DELETE statement.

UPDATE table ...
SET column = newvalue
WHERE coll = valuel
AND col2 = value2

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