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Keyword & Parameter Description:
WHEN:
This keyword introduces the exception handler. You can have many exceptions execute the similar sequence of the statements by following the keyword WHEN with a list of the exceptions, unraveling them by the keyword OR. When any exception in the list is raised, the related statements are executed.
exception_name:
This identifies a predefined exception like ZERO_DIVIDE, or a user-defined exception formerly declared within the present scope.
OTHERS:
This keyword stands for all the exceptions not explicitly named in the exception-handling section of the block. The use of OTHERS is optional and is permitted only as the last exception handler. You cannot involve OTHERS in the list of exceptions subsequent the keyword WHEN.
Statement:
This is merely an executable statement.
NULL Statement The NULL statement clearly specifies in action; it does nothing other than to pass control to the next statement. It can, though, improve the readability. In a
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Collection Methods: The collection method is a built-in function or procedure which operates on the collections and is called using the dot notation. The methods like the C
Write a stored procedure that accepts the post code in which the customer resides as the input parameter. The procedure should then use an explicit cursor to display comprehensive
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Logical Operators The logical operators AND, NOT, and OR follow the tri-state logic shown in table below. The AND and OR are binary operators; NOT is a unary operator.
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%ROWTYPE: This attribute gives a record type which represents a row in the database table or a row fetched from a formerly declared cursor. The Fields in the record and corresp
Implicit Rollbacks Before execute the INSERT, UPDATE, or DELETE statement, the Oracle marks an implicit savepoint . When the statement fails, the Oracle rolls back to the save
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