A trigger is a set of actions that are run automatically when a specified change operation (SQL INSERT, UPDATE, DELETE or TRUNCATE statement) is performed on a specified table. Triggers are useful for tasks such as enforcing business rules, validating in
A trigger in PostgreSQL is a set of SQL statements that are automatically executed when a specific event occurs on a table. These events can include INSERT, UPDATE, or DELETE operations. Triggers can be defined to act either before or after the event, or instead of the event. They can be...
they can run just about any sql query and can affect any other tables in that mysql database. For example, we can have triggers on our "transaction_history" table, after insert, after delete and after update which update a "balance" table when a transaction is added or altered. If we'...
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glad I could help. As for where to learn tsql just doing it seems to be the best for me.Books onlineis a great resource. I also usedw3schoolswhen I was starting out. Reading blog and forums will help in letting you see different solutions to problems. ...
SQL specific property where user can chose to set no-recovery when restore operation is tried objectType string: AzureWorkloadSQLPointInTimeRestoreRequest This property will be used as the discriminator for deciding the specific types in the polymorphic chain of types. pointInTime string PointInTim...
In this example, we set a custom error handler function that will be called when a notice occurs. We then set the error handler using the set_error_handler function. Finally, we call the trigger_error function with the error message "A notice occurred" and the error type E_USER_NOTICE....
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Write a code in PL/SQL to design a trigger that captures changes made to specific columns and logs them in an audit table. Sample Solution: PL/SQL Code: -- Create the employees tableCREATETABLEemployees(employee_id NUMBERPRIMARYKEY,employee_nameVARCHAR2(100),salary NUMBER);-- Create the sal...
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