Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

how can i use for loop in stored procedure in sql server ??

Posted on 2011-03-03
13
773 Views
Last Modified: 2012-05-11
i want to know that how can i use for loop in stored procedure in MS SQL Server ??

please refer the below strored procedure ...

CREATE PROCEDURE usp_SaveNewQuestion
    (
      @uid INT ,
      @Question VARCHAR(200) ,
      @correctOpt VARCHAR(50)
    )
AS 
    BEGIN

        INSERT  INTO Details
                SELECT  uname ,
                        pwd ,
                        email ,
                        login_time ,
                        @Question ,
                        @correctOpt ,
                        logout_time ,
                        comment
                FROM    Details
                WHERE   uid = @uid
        

    END
GO

Open in new window


how can i use for loop in above stored procedure ??
0
Comment
Question by:Parth48
  • 4
  • 4
  • 3
  • +2
13 Comments
 
LVL 39

Expert Comment

by:Pratima Pharande
ID: 35033870
sql u have to use cursor

here is the simple cursor implementation
syntax:
DECLARE cursor_name [INSENSITIVE] [SCROLL] CURSOR
FOR select_statement
[FOR {READ ONLY | UPDATE [OF column_name [,...n]]}]

Open in new window


here is the complate example
http://www.mssqlcity.com/Articles/General/UseCursor.htm
0
 
LVL 10

Expert Comment

by:Jini Jose
ID: 35033873
can u please tell what for you using the loop in your stored procedure ?
for inserting the data ?
0
 
LVL 39

Expert Comment

by:Pratima Pharande
ID: 35033876
you can use while loop like this

DECLARE @intFlag INT
SET @intFlag = 1
WHILE (@intFlag <=5)
BEGIN
PRINT @intFlag
SET @intFlag = @intFlag + 1
END
0
Simplifying Server Workload Migrations

This use case outlines the migration challenges that organizations face and how the Acronis AnyData Engine supports physical-to-physical (P2P), physical-to-virtual (P2V), virtual to physical (V2P), and cross-virtual (V2V) migration scenarios to address these challenges.

 

Author Comment

by:Parth48
ID: 35034003
hello @pratima_mcs: Thanks , in both the way u r right , but which is the better way according to u , using cursor or while loop ??
0
 
LVL 39

Expert Comment

by:Pratima Pharande
ID: 35034023
it really depends on your situation. I almost always use a cursor to loop through records when necessary. The cursor format is a little more intuitive for me and, since I just use the constructs to loop through the result set once, it makes sense to use the FAST_FORWARD cursor. Remember that the type of cursor you use will have a huge impact on the performance of your looping construct.

for more details refer

http://www.techrepublic.com/blog/datacenter/comparing-cursor-vs-while-loop-performance-in-sql-server-2008/1741
0
 

Expert Comment

by:h_aravind
ID: 35034030
You can use a While loop rather than using a cursor. cursors are performance hit.
0
 
LVL 1

Accepted Solution

by:
lalitgada earned 500 total points
ID: 35034081
USE AdventureWorks;
GO
DECLARE @Flag INT
SET @Flag = 1
WHILE (@Flag < 10)
BEGIN
BEGIN
PRINT @Flag
SET @Flag = @Flag + 1
END
IF(@Flag > 5)
BREAK
ELSE
CONTINUE
END
WHILE loop can use SELECT queries as well. You can find following example of BOL very useful.
USE AdventureWorks;
GO
WHILE (
SELECT AVG(ListPrice)
FROM Production.Product) < $300
BEGIN
UPDATE Production.Product
SET ListPrice = ListPrice * 2
SELECT MAX(ListPrice)
FROM Production.Product
IF (
SELECT MAX(ListPrice)
FROM Production.Product) > $500
BREAK
ELSE
CONTINUE
END
PRINT 'Too much for the market to bear';
0
 

Author Comment

by:Parth48
ID: 35034152
hi @lalitgada: where i can download AdventureWorks database ??

is it on MSDN ??
0
 
LVL 39

Expert Comment

by:Pratima Pharande
ID: 35034157
AdventureWorks is default database on SQl server
0
 

Expert Comment

by:h_aravind
ID: 35034171
Adventure works, northwind database etc can be downloaded from Microsoft website or from codeplex.com
0
 

Author Comment

by:Parth48
ID: 35034172
hi @h_aravind: can u please post the download link ??
0
 

Expert Comment

by:h_aravind
ID: 35034179
Can you try this?

http://sqlserversamples.codeplex.com/

This has details for both 2005 & 2008
0
 

Author Comment

by:Parth48
ID: 35034369
hi @h_aravind: thanks for the link ....
0

Featured Post

What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

If you have heard of RFC822 date formats, they can be quite a challenge in SQL Server. RFC822 is an Internet standard format for email message headers, including all dates within those headers. The RFC822 protocols are available in detail at:   ht…
How to leverage one TLS certificate to encrypt Microsoft SQL traffic and Remote Desktop Services, versus creating multiple tickets for the same server.
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

789 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question