Stored procedures
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Stored procedures
- 3. A stored procedure is a method to encapsulate Tasks . A stored procedure is actually stored in database data dictionary.
- 5. CREATE PROCEDURE <procedure name> <Param> <datatype> as Begin <Body of procedure> End //call <procedure name>(param value);
- 6. Create procedure getname(in int) Begin Select * from tbl_user where user_id=id; End Call getname(‘1002’);
- 7. Advantages 1. Maintainability Scripts are in one location, updates and tracking of dependencies based on schema changes becomes easier 2. Speed …………………….. Stored procedures are cached on the server. Execution plans for the process are easily reviewable without having to run the application. 3.Reduced client sever traffic To reduce network traffic between application server and database sever
- 8. Disadvantage Testing Any data errors in handling Stored Procedures are not generated until runtime
- 9. Types of Stored Procedure 1. System Defined Stored Procedure These stored procedure are already defined in Sql Server. 2. Extended Procedure.................................. Extended procedures provide an interface to external programs for various maintenance activities. 3.User Defined Stored Procedure............... These procedures are created by user for own actions 4. CLR Stored Procedure................................... CLR stored procedure are special type of procedure that are based on the CLR (Common Language Runtime) in .NET framework.
- 10. cursors SELECT INTO is fine for single row queries, but many applications require the querying of multiple rows of data Use of cursor For extracting multiple rows into variables from a table
- 11. Create table tbl_login( Vchr_name varchar(50), V chr_userid varchar(50) ); Create table tbl_user( Vchr_user_name varchar(50), Vchr_password varchar(50) ); Create procedure insert_value ( @name varchar(50), @userid varchar(50), @username varchar(50), @password varchar(50) ) As Begin Insert into tbl_login,tbl_user(vchr_name,vchr_user_id,vchr_username,vchr_password) values(@name,@userid,@username,@password) end exec insert_ value ‘ram’,’102’,’akhil’,’12345’;
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