how to solve the problem

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Hi all,

My Query:

C#

strQry = "Select Sitecode,Type,SpeedLimit,Triggerspeed from TBL_TXN_XML_DATA where rtrim(Sitecode) = '" + cmbsitewise.Text.Trim() + " ' and rtrim(Type) = '" + cmbtypewise.Text.Trim() + "'and rtrim(SpeedLimit) = cast(speedlimit as numeric),0)-cast(triggerspeed as numeric),0) '" + txtspeedlimit.Text.Trim() + "' and rtrim(TriggerSpeed) = '" + cmbtriggerspeed.Text.Trim() + "'and  rtrim(FileTime) = '" + cmbfiletime.Text.Trim() + "'  group by Sitecode,Type,SpeedLimit,Triggerspeed

My database:
Speedlimit Triggerspeed
50 65 so different is 15

i Enter the speedlimit value in my text box is >10 that time i need this output

sitecode
Type
speedlimit-50
Triggerspeed-65

how to write query in this output.pls help

Posted 19-Feb-13 21:32pm

siva 2013

Updated 19-Feb-13 21:39pm

Mario Majčica

v2

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Singh Vijay Kumar 20-Feb-13 3:39am

Not Clear, Plus please paste your actual query (final value of strQry).

2 solutions

Solution 2

Thanks for your mail Mr.OriginalGriff.. Thank u so much

Posted 19-Feb-13 22:17pm

siva 2013

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OriginalGriff · Accepted Answer · 2013-02-19T21:56:00

Look at your query.
Let's just cut it down a bit and do some substitutions:

SQL

Select Sitecode,Type,SpeedLimit,Triggerspeed from TBL_TXN_XML_DATA where
   Sitecode = 'SITE' and 
   Type = 'TYPE' and 
   SpeedLimit = 50-65 '50' and 
   TriggerSpeed = '65' and  
   FileTime = 'TIME'  
group by Sitecode,Type,SpeedLimit,Triggerspeed

So, your speed limit is negative...

But stop right there!
Look at your speedlimit clause:

SQL

rtrim(SpeedLimit) = cast(speedlimit as numeric),0)-cast(triggerspeed as numeric),0) '" + txtspeedlimit.Text.Trim() + "'

So this only matches when the trigger speed is zero...

And for goodness sake:
1) Don't store numeric values as strings - store them as numbers. They are much, much easier to work with if you do that.
2) Do not concatenate strings to build a SQL command. It leaves you wide open to accidental or deliberate SQL Injection attack which can destroy your entire database. Use Parametrized queries instead.