Parameter & keyword description - functions, PL-SQL Programming

Parameter & Keyword Description:

function_name:

The user-defined function is identifying by that keyword.

parameter_name:

This identifies the formal parameter that is a variable declared in a function specification and referenced in the function body.

IN, OUT, IN OUT:

These parameter modes define the behavior of the formal parameters. An IN parameter pass the values to the subprogram being called. The OUT parameter returns values to the caller of the subprogram. An IN OUT parameter pass the initial values to the subprogram being called and return the updated values to the caller.

NOCOPY:

This is a compiler hint and not directive, that allows the PL/SQL compiler to pass the OUT and IN OUT parameters by reference rather than by the value.

Datatype:

This is merely a type specifier.

: = | DEFAULT:

This keyword or operator allows you to initialize the IN parameters to the default values.

Expression:

This is a randomly complex combination of constants, variables, literals, operators, & function calls. The simplest expression consists of a single variable. When the declaration is explained, the value of expression is assigned to the parameter. The value and the parameter should have the compatible datatypes.

RETURN:

This keyword introduces the RETURN clause that specifies the datatype of the result value. 

type_definition:

This user-defined datatype is specified by this keyword.

item_declaration:

A program object is declared by this keyword.

function_declaration

The function n is declared by this construct.

procedure_declaration:

The procedure is declared by this construct.

exception_handler:

This construct relates an exception with a series of statements that is executed when that exception is raised.

Posted Date: 10/8/2012 6:58:11 AM | Location : United States







Related Discussions:- Parameter & keyword description - functions, Assignment Help, Ask Question on Parameter & keyword description - functions, Get Answer, Expert's Help, Parameter & keyword description - functions Discussions

Write discussion on Parameter & keyword description - functions
Your posts are moderated
Related Questions
Explicit Cursor Attributes The cursor variable or each cursor has four attributes: %FOUND, %ISOPEN, %ROWCOUNT, and %NOTFOUND. When appended to the cursor or cursor variable, th

Methods: In normal, a method is a subprogram declared in an object type specification using the keyword MEMBER or STATIC. The method cannot have similar name as the object typ

Example of Null operator - NiNo Rule If we wanted to make HIGHER_OF adhere to "NULL in, NULL out"-let's call it the NiNo rule-we would have to write something like what is sho

Question: a) Given the following relation: Location(loc_id, bldg_code, room, capacity) The underlined field is a primary key. (i) Write a PL/SQL program using the impl

Cursor Variables Similar to a cursor, cursor variable points to the current row in the result set of a multi-row query. But, dissimilar a cursor, a cursor variable can be opene

Why Use Cursor Variables ? Primarily, you use the cursor variables to pass the query result sets between the PL/SQL stored subprograms and different clients. Neither PL/SQL nor

Relational Algebra - SQL It describes some operators, that together constitute an algebra that is not only relationally complete but also irreducibly so (very nearly- apart f

Structure of an Object Type: Similar to package, an object type has 2 parts: the specification and the body. The specification is the interface to your applications; it declar

Sequential Control Dissimilar to the IF and LOOP statements, the GOTO and NULL statements are not important to the PL/SQL programming. The configuration of PL/SQL is such that th

THEORY OF SPONTANEOUS GENERATION - ABIOGENESIS OR AUTOGENESIS - According to this theory, the existing living communities have originated from non-living organic matter with