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Keyword and Parameter Description:
boolean_expression:
This is an expression which results the Boolean value TRUE, FALSE, & NULL. It is related with a series of statements that is executed only if the expression results TRUE.
THEN
This keyword relates the Boolean expression which precedes it with the series of statements that follows it. When the expression yields TRUE, the related series of statements is executed.
ELSIF:
This keyword introduce a Boolean expression to be computed if the expression following IF and all the expressions following any preceding ELSIFs results FALSE or NULL.
ELSE:
If control reaches this keyword, the series of statements which follows it is executed.
EXIT-WHEN The EXIT-WHEN statement permits a loop to complete conditionally. Whenever the EXIT statement is encountered, the condition in the WHEN clause is computed. When the co
Implicit Cursors The Oracle implicitly opens a cursor to process each SQL statement not related with an explicitly declared cursor. The PL/SQL lets you refer to the most recen
Parameter and Keyword Description: cursor_name: This identifies an explicit cursor formerly declared within the present scope. cursor_variable_name: These identif
Literals A literal is an explicit numeric, string, character, or Boolean value not represented by an identifier. Numeric literal 147 and the Boolean literal FALSE are some of
Comparison Operators Usually, you use the comparison operators in the WHERE clause of a data manipulation statement to form the predicates, that compare one expression to anot
i NEED THE QURIES TO SOME OF THE PROBLEMS USING plsql
Many of the reports generated from the system calculate the total dollars in a shopper''s purchases. Follow these steps to create a function named TOT_PURCH_SF that accepts a shopp
Updating Tables in SQL The topic of updating by describing the assignment operator, ":=" in Tutorial D. SQL uses a different syntax for assignment, using the key word SET and
Using Operator REF: You can retrieve refs by using the operator REF that, like VALUE, takes as its argument a correlation variable. In the illustration below, you retrieve one
EXECUTE IMMEDIATE Statement The EXECUTE IMMEDIATE statement prepare (parses) and instantly executes a dynamic SQL statement or an anonymous PL/SQL block. Syntax:
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