What are row level and statement level triggers?

What are row level and statement level triggers?

Difference between Row level and Statement level triggers

Row Level Triggers Statement Level Triggers
Row level triggers executes once for each and every row in the transaction. Statement level triggers executes only once for each single transaction.

What are statement level triggers?

A statement-level trigger is fired whenever a trigger event occurs on a table regardless of how many rows are affected. In other words, a statement-level trigger executes once for each transaction. For example, if you update 1000 rows in a table, then a statement-level trigger on that table would only be executed once.

What are statement level triggers explain with example?

Statement-level triggers for transaction-related activities. • Statement-level triggers execute once for each transaction. For example, if a single transaction inserted 500 rows into the Customer table, then a statement-level trigger on that table would only be executed once.

What is statement level trigger?

What are triggers explain with example?

Trigger: A trigger is a stored procedure in database which automatically invokes whenever a special event in the database occurs. For example, a trigger can be invoked when a row is inserted into a specified table or when certain table columns are being updated.

How many times a trigger statement is executed?

In other words, a statement-level trigger executes once for each transaction. For example, if you update 1000 rows in a table, then a statement-level trigger on that table would only be executed once.

What is statement Level trigger?

Statement level triggers are triggered only once for each transaction. For example when an UPDATE command update 15 rows, the commands contained in the trigger are executed only once, and not with every processed row. Statement level trigger are the default types of trigger created via the CREATE TRIGGER command.

How does a trigger work in Oracle?

A trigger is like a stored procedure that Oracle Database invokes automatically whenever a specified event occurs. The database can detect only system-defined events. You cannot define your own events. Like a stored procedure, a trigger is a named PL/SQL unit that is stored in the database and can be invoked repeatedly.

What are the types of triggers in Oracle?

There are five different types of Oracle Database triggers. Statement triggers are associated with a DML statement, such as DELETE, INSERT, or UPDATE, on a specified table or view. Row triggers are fired for each row that is affected by an INSERT, UPDATE, or DELETE statement on a table.

What is a default trigger in Oracle?

The default master-detail triggers enforce coordination between records in a detail block and the master record in a master block. Unless you are developing your own custom block-coordination scheme, you do not need to define these triggers yourself.