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DELETE TRIGGER Command

  • [アーティクル]

Removes a Delete, Insert, or Update trigger for a table from the current database.

DELETE TRIGGER ON TableName FOR DELETE | INSERT | UPDATE

Parameters

  • TableName
    Specifies the name of table for which the trigger is deleted.
  • FOR DELETE | INSERT | UPDATE
    Specifies the trigger to delete. Include FOR DELETE to remove the Delete trigger, FOR INSERT to remove the Insert trigger, and FOR UPDATE to remove the Update trigger.

Remarks

Use CREATE TRIGGER to create a Delete, Insert, or Update trigger for a table.

Example

The following example creates an Update trigger, which prevents values greater than 50 from being entered in the maxordamt field in the customer table. DISPLAY DATABASE is used to display the Update trigger. DELETE TRIGGER is then used to remove the Update trigger, and DISPLAY DATABASE is issued again to verify the removal of the Update trigger.

CLOSE DATABASES
OPEN DATABASE (HOME(2) + 'Data\testdata')  && Open testdata database
USE CUSTOMER  && Open customer table

CREATE TRIGGER ON customer FOR UPDATE AS maxordamt <= 50
CLEAR
DISPLAY DATABASE
DELETE TRIGGER ON customer FOR UPDATE
DISPLAY DATABASE

See Also

ADD TABLE | AERROR( ) | CREATE DATABASE | CREATE TRIGGER | DISPLAY DATABASE | LIST DATABASE | OPEN DATABASE