Sql Server Stored Procedures

Stored Procedures and block of code which does one or more actions on a database. 

CREATE PROCEDURE spHello as
 PRINT 'Hello welcome to T-Sql'
GO

Executing a stored Procedure

EXEC spHello

Stored Procedure with varchar parameter and string concatenation

create procedure spHelloName (@Name varchar(20))
as 
 print 'Hello ' + @Name
go

Procedure with integer Parameter and addition
Memory variables must preceded with @ symbol

create procedure spAdd(@p1 int, @p2 int)
as
 print @p1 + @p2
go

If

create procedure spIf (@pCity varchar(40))
as
if @pCity = 'Kochi'
 print 'Industrial capital  of Kerala'
go

While Loop

create or alter procedure spWhile
as
DECLARE @cnt INT = 0;

WHILE @cnt < 10
BEGIN
   PRINT 'Hello '
   SET @cnt = @cnt + 1;
END;
GO

While Loop with Cast

create or alter procedure spWhileCounter
as
DECLARE @cnt INT = 0;

WHILE @cnt < 10
BEGIN
   PRINT 'Hello ' + cast(@cnt as varchar(3))
   SET @cnt = @cnt + 1;
END;
GO 

Stored Procedure for Selecting values from a Table

CREATE PROCEDURE spAllCategories
AS
 select * from Categories
GO

spAllCategories

Stored Procedure with Joins
create procedure spAllProductsCategory
as
SELECT C.CategoryName, P.ProductName, P.UnitPrice FROM Categories C , Products P WHERE C.CategoryId = P.CategoryId
go

Stored Procedure with Where Clause
create procedure spProductsCategorySearch(@pCategoryId int)
as
SELECT C.CategoryName, P.ProductName, P.UnitPrice FROM Categories C , Products P WHERE C.CategoryId = P.CategoryId and C.CategoryId = @pCategoryId
go
spProductsCategorySearch 1
spProductsCategorySearch 2

Stored Procedure for Inserting values into a Table
create procedure spInsertCategories (@pCategoryName varchar(40), @pDescription varchar(60))
as
insert into Categories (CategoryName, Description) values (@pCategoryName, @pDescription)
GO

EXEC spInsertCategories @pCategoryName = 'Condiments', @pDescription = 'Sweets and savory sauces, relishes, spreads, and seasonings'spInsertCategories 'Confections', 'Desserts, candies, and sweet breads'


User Managament Scripts
create database UserManagement

use UserManagement

create table Roles(RoleId int identity(1,1) primary key, Role varchar(40))

create table Users (UserId int identity(1,1) primary key,
RoleId int References Roles(RoleId), UserName varchar(40),
Password varchar(40))

create procedure InsertRole(@pRoleName varchar(40))
as
insert into Roles values (@pRoleName)
go

insertRole 'Admin'

create procedure spAllRoles as
select * from Roles
go

create procedure spInsertUser(@pGroupId int,
@pUserName varchar(40), @pPassword varchar(40))
as
insert into Users values (@pGroupId, @pUserName, @pPassword )
go

spInsertUser 1, 'Greorge', 'george'
spAllRoles

create procedure spAllUsers
as
select * from Users
go

spAllUsers

create procedure spUserCount (@pUserName varchar(40), @pPassword varchar(40), @userCount int output)
as
select @userCount = COUNT(*) from Users where UserName = @pUserName and Password =@pPassword
return
go

spUserCount 'George', 'george', ''

create procedure GetUserRole (@pUserName varchar(40))
as
select R.Role from Roles R, Users U where R.RoleId = U.RoleId and U.UserName = @pUserName
go

GetUserRole 'Shalvin'

GetUserRole 'Manu'