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This article is to share with you about how to create sql database triggers, the editor feels very practical, so share with you to learn, I hope you can get something after reading this article, say no more, follow the editor to have a look.

The way to create a sql database trigger is: [create trigger trigger_name on table_name as sql_statement]. A trigger is a special stored procedure that triggers execution when inserting, updating, or deleting a table.

What is a trigger?

A trigger is a special stored procedure that triggers execution when a table is inserted, updated, or deleted.

Triggers are generally used in check constraints or some subsequent transaction logic processing. The difference between a trigger and an ordinary stored procedure is that a trigger is when it operates on a table.

Such as: update, insert, delete these operations, the system will automatically call to execute the corresponding trigger on the table. So triggers can be used to implement complex integrity constraints on tables.

Add creation syntax

Create trigger trigger_name on {table_name | view_name} {for | After | Instead of} [insert, update,delete] as sql_statement

Modify syntax

Alter trigger trigger_name-- is similar to modifying the table structure

Delete syntax

Drop trigger trigger_name

View trigger

Select * from sys.triggersselect * from sysobjects where xtype='TR'

View a single trigger

Exec sp_helptext 'trigger name' is how to create sql database triggers. The editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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