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Since you have to execute the select statement somewhere, view is not a bad option at all. Basically it's only a stored version of the statement. If you compare the same query inside a view or stored procedure, there's no difference in execution. However, if stored procedure is created using cursors, the stored procedure will be much slower and inefficient.
If you build complex queries over the view, there may be problems for the optimizer to find a good plan. For example, so called predicate pushing may not always be possible. For this reason most of the logic in the statement should be put into the query in the view (if possible).
Another area you should consider is data modifications. Fetching the data through a view is a simple and efficient process, but how are the modifications done. Is the application executing delete, insert and update against the view or do DML statements use another path to the data. When using views there are lots of restrictions that cause the view not to be updatable anymore. For example, joining in view and deleting against the view. Should all the rows be deleted in joined tables or not. You can use INSTEAD OF triggers to overcome these limitations.
Hope this helps,
Mika
The need to optimize rises from a bad design.
My articles[ ^]
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Thanks Mika.
Yes we can use Instead of Triggers where we face problems in delete/ update statements. But I got the idea from your answer that using views doesnot impact any performance as I have to issue the select statement either in Stored Procedure or View.
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No problem 
The need to optimize rises from a bad design.
My articles[ ^]
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i need a sample project as an example of inserting data in a sql database using t-sql on visual studio in webset using asp.net and the form contain textboxs which has the fields of the inserted data ...and it get's inserted into a table in the database
something like registration form
i hope you can help me ... thanks for reading
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Write your code, and if it doesn't work post it here and someone will help you. There are literally thousands of examples both here on CP and Google.
Bob
Ashfield Consultants Ltd
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Hi all,
i would to embed my database file(mssql 2005 express) in my exe file. can any one suggest me the way how i do this.
thanks in advance.
rmshah
Developer
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You can't. SQL server need exclusive access to it when it is running as a database.
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Hay ..
in SQL server 2005
I can make any select statement , but how can I get the last record :
like that
id invNo
1 a1
2 a2
3 a3
<br />
@newinv nvarchar(10) output<br />
AS<br />
SET NOCOUNT ON<br />
begin<br />
SELECT * FROM table ORDER BY invNo<br />
end<br />
<br />
I want to get the field invNo of the last record then by substring function i can add One ..
I hope my question is clear .
thanks
jooooo
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select top 1 invNo from table order by id desc
I Love T-SQL
"Don't torture yourself,let the life to do it for you."
If my post helps you kindly save my time by voting my post.
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Great minds think alike...
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"select top 1 InvNo from table order by id DESC" -- ASSUMES ID IS AN IDENTIY FIELD, OPR AT LEAST THAT THE LAST RECORD HAS THE HIGHEST id
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try this:
Select Max(idno) for last record and Min(idno).
rmshah
Developer
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Hi All,,,
I have a SQL Pervasive 9 database, and have a problem to manage the owner name in it.
How I can Stop the owner name at my project??
thanks all,,
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Have you thought about asking the vendor? I bet they know.
Bob
Ashfield Consultants Ltd
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Dear All,
I am trying to put the code for generating an eXcel file using xp_cmdshell into a stored procedure for the purpose of calling it from code.
The code was given by a member of one of the forums sometime back.
USE northwind
EXEC master..xp_cmdshell 'bcp "select ''categoryname'',''description'' union all select categoryname,description from northwind.dbo.categories" queryout "d:\Shared\test1.xls" -c -S"172.16.121.203" -U"sa" -P""'
The above code works brilliantly.
I tried to put it into a stored procedure but getting various errors.The sp creation code is as below:
CREATE PROCEDURE [dbo].[SpWriteExcel]
AS
--create a variable @sql
--DECLARE @SQLStatement varchar(500)
DECLARE @SQLStatement1 varchar(500)
-- @SQLStatement = USE northwind
SELECT @SQLStatement1 = "EXEC master..xp_cmdshell 'bcp select ' 'categoryname' ' ,' 'description' ' union all select categoryname,description from northwind.dbo.categories queryout 'd:\Shared\test2.xls' -c -S\'172.16.121.203\' -U 'sa' -P' ''"
--Execute the SQL statement
--EXEC(@SQLStatement)
EXEC(@SQLStatement1)
GO
The error is with SELECT @SQLStatement1. So I tried to change it in various ways but did not get any success.
One of the ways I changed it to is as below:
SELECT @SQLStatement1 = " EXEC master..xp_cmdshell 'bcp "+"select categoryname,description union all select categoryname,description from northwind.dbo.categories"+" queryout "+ "d:\Shared\test3.xls"+" -c "+"-S"+"172.16.121.203"+"-U"+"sa"+" -P"+""+"'"
Could you pls write a proc for me which contains the above command and which takes the database name, table name and the excel file path as parameters.
Thanks for your help.
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sunny74 wrote: Could you pls write a proc for me
Yes, I could, but I won't. The best solution is to print the sql rather tahn exec it, then you can see whats wrong. Its all part of the learning process, called debugging, and as a developer its something you should be able to do - after all, its what you are being paid for.
Bob
Ashfield Consultants Ltd
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Hi,
iam using MySql db,
my stored procedure is like this..
DELIMITER $$
DROP PROCEDURE IF EXISTS `test`.`IS_CITY_EXISTS` $$
CREATE PROCEDURE `IS_CITY_EXISTS`(
IN CITYNAME VARCHAR(45),
OUT AVAILABLE BOOLEAN
)
BEGIN
IF EXISTS(SELECT * FROM city_details WHERE city_name=CITYNAME) THEN
SELECT 1 INTO AVAILABLE;
ELSE
SELECT 0 INTO AVAILABLE;
END IF;
END $$
DELIMITER ;
when iam executing this procedure works fine..
CALL IS_CITY_EXISTS('kak',@Available);
but while exceuting SELECT @AVAILABLE;--IT'S giving result null.
is there any error in procedure..
how can i call this procedure in (c#)..
murali krishna
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I've never used MySQL but two observations still:
- you set delimiter to $$. However you use semicolon after the statements.
- is 0 equal to false in mysql or does it understand false keyword. If so, 0 may be interpreted to null since it's not false.
But then again, just guessing.
The need to optimize rises from a bad design.
My articles[ ^]
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Is there anybody show me how to create Function in MySql database?
I need it urgently. 
I have been seeking and trying for 2 days.
but not succeed.
i m trying to extract only number from a given string.
but everytime i try, it show error msg (syntax error)
could anybody has a sample function in mysql database pls?
thanks in advance!
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kyi kyi wrote: I need it urgently.
Not that urgently or you would have tried here[^] - loads of samples.
Bob
Ashfield Consultants Ltd
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Quit cross posting.
kyi kyi wrote: I need it urgently.
Oh well, that's your problem. Not mine or anyone else's.
"The clue train passed his station without stopping." - John Simmons / outlaw programmer
"Real programmers just throw a bunch of 1s and 0s at the computer to see what sticks" - Pete O'Hanlon
"Not only do you continue to babble nonsense, you can't even correctly remember the nonsense you babbled just minutes ago." - Rob Graham
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Hi all .
I wount to restore the DataBase But the restore operation is Feild and get me the Error int message : " System.Data.SqlClient.SqlError : The Operating System returned the error '5(error not found)' while attempting 'Restore Container :: ValidationTargetForCreation' on (Microsoft.SqlServer.Express.Smo)" .
What is the Error Meaning and How i Can Solve it ??
Thanks For Any boudy hellp me ![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
Thaer
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Most likely the file you're trying to restore does not exist or the directory is wrong. Remember that when you issue a restore command, the file must be defined in a way how SQL Server service sees it.
The need to optimize rises from a bad design.
My articles[ ^]
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How to Following the steps that I define aconnection Between My Server And The Client Pc ..
thanks...
jetwll
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