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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.
Committing and Rolling Back The COMMIT and ROLLBACK end the active autonomous transaction but do not exit the autonomous routine. As the figure shows, if one transaction ends,
Collections: The collection is an ordered group of elements, all of similar type (for illustration, the grades for a class of students). Each element has an exclusive subsc
Using the student and faculty tables create a select query that outputs all students for a specific advisor. Generate the execution plan, select out the explain plan . Create an
Use the NOCOPY Compiler Hint By default, the OUT and IN OUT parameters are passed by the value i.e. the value of an IN OUT actual parameter is copied into the corresponding fo
Parameter and Keyword Description: table_reference: This keyword identifies the table or view that should be accessible when you execute the UPDATE statement, and for wh
1. a. Write a trigger that fires when a part's price is updated. The trigger will write a record into a table called PriceUpdates. The record should contain the information of
Name Resolution During the compilation, the PL/SQL compiler relates identifiers like the name of a variable with an address or memory location, actual value, or datatype. Th
Main features of PL/SQL A good way to get familiar with PL/SQL is to look at a sample program. The below program processes an order for tennis rackets. At first, it declares a
set serveroutput on declare a number(5); b number(5); c number(5); begin a:=&a; b:=&b; c:=a/b; dbms_output.put_line(c); exception when zero_d
FOR-LOOP While the number of iterations through a WHILE loop is unknown till the loop completes, then the number of iterations through a FOR loop is known before the loop is ent
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