Pl sql if inserting updating

3) Then AFTER row level trigger fires once for each affected row.

The UPDATE statement can modify one or more records and generally takes this form: To delete the data that is currently in a table, you use the DELETE statement, which is commonly referred to as a delete query. The DELETE statement can remove one or more records from a table and generally takes this form: The DELETE statement does not remove the table structure—only the data that is currently being held by the table structure.The above rules apply similarly for INSERT and DELETE statements.We can use the data dictionary view 'USER_TRIGGERS' to obtain information about any trigger.When you are inserting records from another table, each value being inserted must be compatible with the type of field that will be receiving the data.The following INSERT INTO statement inserts all the values in the Customer ID, Last Name, and First Name fields from the tbl Old Customers table into the corresponding fields in the tbl Customers table.

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