Syntax to write a stored procedure in oracle

(variable Direction data type, variable direction data type,….)  as number varchar2

Beginàkeyword

Statement;                         create procedure abc

Statement;

Statement;

End;àkey word

/(execute)

Sp Ex:-1

A SP for adding two numbers

àopen oracle software

àtype as follows at SQL Prompt

Create or replace procedure add 2(a in number, b in number, c out number)as

Begin

Bi direction. Operator

C:=a+b;

End;

[:=B1-Directional operator]

/

SP EX:-2

A Procedure for turning the spelling of a given number

Create or replace procedure Get spell(n in number, X out vachar2)as

Begin

To_ data(n, ’J’)X

Select  to – char(to-date(n,’J’),’JSP’) in to x

Upper case

From dual;

End;          logical  table which is created and destroyed at runtime

A Query to display all procedure names

Select* from user-object where

Object-type=’PROCEDURE’

Steps to execute a procedure at SQL prompt

Variable a varchar2(100)

Exec Get spell(98765,:a)

Print a;

Copy it to the sql prompt

Calling the stored procedure from c#.NET

Open WFAP

Place two textboxes and a button

Using system. data.ole Ob;

Code for button1_click

{

OleDb connection cn=new oleDb connection

(“Prorider = msdaora.1;user id = scott; password = tiger”);

Cn. Open();

oleDb command cmd= new oleDb command();

cmd. connection=();

cmd. command text=”Get spell”;

Procedure name

cmd. command type= command type stored procedure;

oleDb parameter P1,P2;

P1= cmd. Parameter Add(“a”, oleDb type. Integer);

P1.Direction = Parameter Direction. Input;

P1. Value = Int. parle(text box1. text);

P2= cmd. Parameter Add(“b”, oleDb type. Varchar,100);

P2.Direction = Parameter Direction. out put;

//for out put Parameter value is not allowed.

cmd. Execute non Query();

text box2.text = p2. Value. To string();

}

F5

Working with data relations

• Data relation is a class, which is the part of dataset
• Data relation class, is used to create the relation in between two tables with the belD 001 primary and foreign keys
• Logical Link .between tow tables is called as relation
• To create a Relation, fire things are required:-

(a) Parent table

(b) primary key

(c)Child table

(d)Foreign key

(e)Relation name

• Data grid view control of .NET 3.5 is capable to display only one table at a time

Data grid control of  .NET 1.1 is capable to display more than one table also at a time

• Data grid control is not available in the tool box by default, hence it need to be added

 Open WFAP

Open Tool box right click inside of general tab choose ItemsSelect data gridà ok

Place a button and data grid control on the form using system. Data. oleDb;

Code for button 1 _click

{

oleDb connection cn = new oleDb connection

(“user id =scott; pass word = tiger; provider = msdaora.1”);

oleDb Data adapter dl=new oleDb Data Adapter

(“Select*from dept”,cn);

oleDb Data Adapter d2= new oleDb Data Adapter

(“Select*from emp”,cn);

Data set ds=new dataset();

dl.fill(ds,”d”);

d2.fill(ds,”e”)                     Allas names

Data Column prk = ds. Tables[“d”].Columns[“deptno”];

Data Column fk = ds. Tables[“e”].Columns[“dept no”];

Data relation dr=new data relation(“rel”, prk, fk);

Alias name for the relation

Ds. Relation. Add(dr);

Data gridl. data source=ds;

(or)

Data Grid view1.Data source= ds. Tables[“d”];