Slow Random Products - Database Discussion Boards

It wasn't complaining about the select, it was the resuklt when you tried to exec it. You had too many quotes

try this

SELECT @vSQL = 'INSERT INTO #rapor(S'+ convert(varchar, @SNO) + ') VALUES('' '+ @sonuc+ ' '')'

Your original selct gave this (I set @sonuc to f) :

INSERT INTO #rapor(S10)' VALUES(' f ')

rather than

INSERT INTO #rapor(S10) VALUES(' f ')

Bob
Ashfield Consultants Ltd

thanx for helping bob

i saw now that i had a mistake

this is working below,
SELECT @vSQL = 'INSERT INTO #rapor(S'+ convert(varchar, @SNO) + ') VALUES('''+convert(varchar, @SONUC) +''')'

an by the way how can i see what value in my variable

i mean like c# Console.WriteLine(@vSQL) and it writes

INSERT INTO #rapor(S10) VALUES(' f ')

how can do with tsql

thanks again

Sampiyon FENERBAHCE

TALHAKOSEN wrote:
thanx for helping bob

No problem, always happy to help.

TALHAKOSEN wrote:
how can i see what value in my variable

If running in query analyser

print @vSQL

or simply

select @vSQL

Bob
Ashfield Consultants Ltd

declare @vSQL varchar(1000)
DECLARE @SNO INT;
DECLARE @SNO2 INT;
DECLARE @KNO INT;
DECLARE @SONUC VARCHAR(10);
SET @SNO = 10;
SET @SNO2 = 10;

WHILE @SNO < 83
BEGIN
DECLARE ankcev_cursor SCROLL CURSOR FOR
SELECT KULLANICINO FROM AnketCevap WHERE ANKETID='7'
OPEN ankcev_cursor

FETCH NEXT FROM ankcev_cursor INTO @KNO

WHILE @@FETCH_STATUS = 0
BEGIN
--SELECT CEVAPSIK FROM ANKETCEVAP WHERE ANKETID='7' AND KULLANICINO = @KNO AND SORUNO=@SNO
SET @SONUC=(SELECT CEVAPSIK FROM ANKETCEVAP WHERE ANKETID='7' AND KULLANICINO = @KNO AND SORUNO=@SNO)
SELECT @vSQL = 'UPDATE #rapor SET S'+ convert(varchar, @SNO)+'='''+ convert(varchar, @SONUC)+''' where ID='''+ convert(varchar, @KNO) + ''''
Execute (@vSQL)
FETCH NEXT FROM ankcev_cursor INTO @KNO
END

CLOSE ankcev_cursor
DEALLOCATE ankcev_cursor
SET @SNO = @SNO+1;
END

PRINT @vSQL
PRINT @SNO ------ALWAYS WRITE S10 why stay same value ????

Sampiyon FENERBAHCE

Don't know. I took your code and commented out all the bits that wouldn't run and it printed 83.

declare @vSQL varchar(1000)
DECLARE @SNO INT;
DECLARE @SNO2 INT;
DECLARE @KNO INT;
DECLARE @SONUC VARCHAR(10);
SET @SNO = 10;
SET @SNO2 = 10;


WHILE @SNO < 83
BEGIN
--	DECLARE ankcev_cursor SCROLL CURSOR FOR
--	SELECT KULLANICINO FROM AnketCevap WHERE ANKETID='7'
--	OPEN ankcev_cursor
--
--	FETCH NEXT FROM ankcev_cursor INTO @KNO
--
--	WHILE @@FETCH_STATUS = 0
--	BEGIN
--	--SELECT CEVAPSIK FROM ANKETCEVAP WHERE ANKETID='7' AND KULLANICINO = @KNO AND SORUNO=@SNO
--		SET @SONUC=(SELECT CEVAPSIK FROM ANKETCEVAP WHERE ANKETID='7' AND KULLANICINO = @KNO AND SORUNO=@SNO)
--		SELECT @vSQL = 'UPDATE #rapor SET S'+ convert(varchar, @SNO)+'='''+ convert(varchar, @SONUC)+''' where ID='''+ convert(varchar, @KNO) + ''''
--		Execute (@vSQL)
--		FETCH NEXT FROM ankcev_cursor INTO @KNO
--	END
--
--	CLOSE ankcev_cursor
--	DEALLOCATE ankcev_cursor
	SET @SNO = @SNO+1;
END

PRINT @vSQL 
PRINT @SNO ------ALWAYS WRITE S10 why stay same value ????

Bob
Ashfield Consultants Ltd

ok ok i see now my mistake

SELECT KULLANICINO FROM AnketCevap WHERE ANKETID='7' and <soruno> i forget to add this
so it takes to long times to return back ))

anyway thanks for your patience on me )) thank a lot...

Sampiyon FENERBAHCE

Thats OK

Bob
Ashfield Consultants Ltd

Hi
QUESTION:
Why is the code running so slow and what can I do to improve it?

THE CODE:

$currentTable = "SS_products";
$q1 = db_query("SELECT FLOOR(RAND() * COUNT(*)) AS rand_row FROM ".
$currentTable) or die (db_error());

$row1 = db_fetch_row($q1);
$q2 = db_query("SELECT categoryID, name, default_picture FROM ".
$currentTable." WHERE categoryID=7 Limit $row1[0], 1") or die (db_error());

Background Infomation on the Code:
I have a website where I use a shopping cart system called ShopScript Premium. This system works more then fine with my current webhost BlueHost. But a problem arises when I add customized the code.

I have added to the website home page that every time the browser is refreshed 10 new random products will be the customers. The ShopScript system only offers products which are to be changed by the administrator manually. When the code for the random product is executed the website runs considerably slower then without the random products, although sometimes and does run with no problems and fast speed for a minute or so. Even if the user is using the other pages the website is still slow. I suspect this has to do with the fact that the ShopScript system uses a smarty engine, although that does not fully explain why.

In my database the table called has 1373 rows. I use the code above to randomly select one of the rows to be viewed on the website. According to my log on mySQL slow queries, the above mentioned code, is the source of the problems. The log states that the code uses 2 to 4 seconds query time. My webhost does not allow any single process taking more than 30 CPU seconds to run or if the total processes take more than 40 CPU seconds in any 60 second window to avoid server lockups. Such an event triggers a CPU Quota/Suspension Error, where my website is accessable for 5 to 10 minutes. This is a big problem as I lose customers this way.

On before hand
Thank you for your help

Count(*) is always slow. Try to use a different seed for generating your random number. If it's SQL Server 2005, you can use sys.sysindexes to get the rowcount.

If you don't need a really random record why not just select a record based on something like

select datediff(ms,getdate(), dateadd(hour, datepart(ss,getdate()),getdate()))

This may not be random enough, but you get the idea .

Bob
Ashfield Consultants Ltd

i need to get report from a table which has questionId field, studentId, inquiryId like that and there are 80 questions and 300 students replied this inquiry. I need a result like below (question=q)

inqueryId studentId q1 q2 q3 q4 q5 ..... q79 q80
7 123 a b b c d e c
7 245 b c d e e c c

i create temporary table has 80 question field but i cant fill it from my original table

Sampiyon FENERBAHCE

U need to craete a dynamic query for inserting data in the table like

declare @Dynstr varchar(4000)

set @Dynstr ='update #TempDyamicWeek
SET col'+cast(@count1 as varchar(10)) +' =#TempDurByWeek.duration
from #TempDyamicWeek inner join #TempDurByWeek on
#TempDyamicWeek.userid= #TempDurByWeek.userid
and #TempDyamicWeek.type=#TempDurByWeek.type
and #TempDurByWeek.WeekEnding= '''+convert(varchar(30),@CurDateTo,121)+''''

exec (@Dynstr)

please coorect the colume name according to yours..

Thanks
Hem

thanks a lot

Sampiyon FENERBAHCE

Hi all,

I want to learn that, can i change name of variable, i mean i wanna have
@s1, @s2, @s3 ... @s20 but i dont wanna write it wanna use

WHILE X<20
BEGIN
DECLARE @SX
X=X+1;
END

CAN I DO THAT pls help

Sampiyon FENERBAHCE

Can't be done.

Bob
Ashfield Consultants Ltd

When using SQL as the way you described, no.

However, if you use dynamic SQL, meaning you create a string that contains the SQL statement and execute it, this can be done.

The need to optimize rises from a bad design

What is mysql and what is ado.net

Hi,

MYSQL is a open source database management system.

For more details please visit the following link:

What is MySQL[^]

ADO.NET stands for ActiveX Data Objects for .NET. It refers to the suite of data access technologies used to manipulate databases. ADO.NET is part of the .NET Framework.

For more details please visit the following link:

What is ADO.Net[^]

Hope this helps Smile | :)

.

Regards,
John Adams
ComponentOne LLC

Hello Friends,

I have a table named Table1 and a column named CreationTime.
CreationTime has the datatype as datetime.
It gives the output as mm/dd/yyyy hh:mm:ss
But I want the output as hh:mm:ss
I am aware that I can use CAST or CONVERT function, but I am not getting a proper syntax for the same.
I would appreciate if anyone of you could help me to get the current syntax for what I wish to achieve.

Thank you,
notes4we

notes4we wrote:
I am not getting a proper syntax for the same.

What does that mean?

SELECT CONVERT (varchar, CreationTime, 108) FROM Table1
ought to do it...

Thank you. I am able to get the desired output now.

[Message Deleted]

?? ADO.NET is not a database.

Anyone has experience getting it to work? When I tried to configure an ODBC database source, there is a dropdown list that is supposed to have all existing (oracle) services defined on your machine. For me, this dropdown list contains unreadable characters. If I ignore this dropdown and type in my service name, it won't work either.

Does anyone have the same problem?

My .NET Business Application Framework
My Home Page
My Younger Son & His "PET"

Hi fellow coders!

I'm in a desperate need for some help in the form of code to convert opc-data to ODBC-data, does anyone know how this has to be done.
My main problem is that I shall picksome specific parameters from the OPC stream and send that data to an ODBC source.

TIA Wink | ;)

Kind regards

Carsten