- What are the different types of triggers?
- Can a view call a stored procedure?
- Are views faster than queries?
- What are after triggers?
- Can we call a procedure inside a trigger in Oracle?
- What are triggers and stored procedures and how can they be used to make a database better?
- Can we call trigger manually?
- Why use triggers in SQL?
- What is the difference between stored procedure and view?
- Can we use trigger in stored procedure?
- Why you should not use stored procedures?
- What is the advantage of stored procedure over the database triggers?
- When should I use stored procedures?
- How is a trigger different from a procedure?
- Which is faster stored procedure or view?
- What is procedure function and trigger?
- Which statement is used to remove a trigger?
- What triggered?
What are the different types of triggers?
Types of TriggersData Manipulation Language (DML) Triggers.
DML triggers are executed when a DML operation like INSERT, UPDATE OR DELETE is fired on a Table or View.
Data Definition Language (DDL) Triggers.
Can a view call a stored procedure?
You can do the subqueries-to-temp table stuff in a stored procedure, but you can’t call a stored procedure from a view. …
Are views faster than queries?
Views make queries faster to write, but they don’t improve the underlying query performance. … In short, if an indexed view can satisfy a query, then under certain circumstances, this can drastically reduce the amount of work that SQL Server needs to do to return the required data, and so improve query performance.
What are after triggers?
Before triggers: used to update or validate record values before they’re saved to the database. After triggers: used to access field values that are set by the system (such as a record’s Id or LastModifiedDate field) and to effect changes in other records. The records that fire the after the trigger is read-only.
Can we call a procedure inside a trigger in Oracle?
When invoking a procedure from within an SQL trigger, an SQL routine, or a dynamic compound statement the following restrictions apply: In partitioned database environments procedures cannot be invoked from triggers or SQL UDFs.
What are triggers and stored procedures and how can they be used to make a database better?
A trigger is a special kind of stored procedure. It is attached to a table and only triggers when an insert, update or delete occurs. Stored procedures are essential functions that you can create and reuse in the table. A stored procedure can be called form another stored procedure but not ab trigger.
Can we call trigger manually?
Yes,triggers are executed manually. Triggers are special types of Stored Procedures that are defined to execute automatically in place of or after data modifications. They can be executed automatically on the INSERT, DELETE and UPDATE triggering actions.
Why use triggers in SQL?
Triggers help the database designer ensure certain actions, such as maintaining an audit file, are completed regardless of which program or user makes changes to the data. The programs are called triggers since an event, such as adding a record to a table, fires their execution.
What is the difference between stored procedure and view?
View is simple showcasing data stored in the database tables whereas a stored procedure is a group of statements that can be executed. A view is faster as it displays data from the tables referenced whereas a store procedure executes sql statements. A view is a simple way to save a complex SELECT in the database.
Can we use trigger in stored procedure?
You cant call Trigger from Stored Procedure, as Trigger are created on table and get fired implicitly. But you can call stored procedure to from trigger, but do remeber it should not be recursive.
Why you should not use stored procedures?
Stored procedures are difficult to unit test. With an ORM, you can mock your database code so as to be able to test your business logic quickly. With stored procedures, you have to rebuild an entire test database from scratch. Stored procedures offer no performance advantage whatsoever.
What is the advantage of stored procedure over the database triggers?
Advantage of a stored procedure over a database trigger. Stored procedures can accept parameters and can return values. Triggers can neither accept parameters nor return values. A Trigger is dependent on a table and the application has no control to not fire a trigger when not needed.
When should I use stored procedures?
The benefits of using stored procedures in SQL Server rather than application code stored locally on client computers include:They allow modular programming.They allow faster execution.They can reduce network traffic.They can be used as a security mechanism.
How is a trigger different from a procedure?
Trigger and Procedure both perform a specified task on their execution. The fundamental difference between Trigger and Procedure is that the Trigger executes automatically on occurrences of an event whereas, the Procedure is executed when it is explicitly invoked.
Which is faster stored procedure or view?
A view is essentially a saved SQL statement. Therefore, I would say that in general, a stored procedure will be likely to be faster than a view IF the SQL statement for each is the same, and IF the SQL statement can benefit from optimizations. Otherwise, in general, they would be similar in performance.
What is procedure function and trigger?
Procedures doesn’t return any values their just get parameters and do something with them, functions does the same by their also can return you a value based on their work. Triggers are kind of event handlers that react on any action you want and start procedure when this action happens.
Which statement is used to remove a trigger?
DROP TRIGGER statementUse the DROP TRIGGER statement to remove a database trigger from the database. The trigger must be in your own schema or you must have the DROP ANY TRIGGER system privilege.
Triggers are anything that might cause a person to recall a traumatic experience they’ve had. For example, graphic images of violence might be a trigger for some people. Less obvious things, including songs, odors, or even colors, can also be triggers, depending on someone’s experience.