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Old December 20th, 2005, 11:16 AM
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Default need help again

Hello all
if we want to check all the recordset and fine the biggest Row(Row is one of the columns in database)can we write such code?
<%Dim i,a
                 i="0"
                 rs.movefirst()
                 while not rs.eof
                if (rs("Row")>i) then
                 i=rs("Row")
                 end if
                 rs.movenext()
                 wend%>
when i run this it gives me always "1"
where is my mistake?


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Old December 20th, 2005, 12:05 PM
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Firstly, it looks like you're setting i to be a string value of "0" rather than a numeric value of 0, which means you may be getting strange results when running a comparison.

Secondly, if you're looking for the highest value in a column of a table in a database (assuming that table holds numeric values) isn't it better to run a SQL statement to do this in one operation rather than iterating through a recordset?

The SQL statement would be something like:

SELECT MAX(Row) from [table name]

Of course it would be a better idea to put this in a stored procedure and return the result from that, as it's always much lower risk running a stored procedure rather than hard coding SQL in your ASP.
EG

CREATE PROCEDURE maxRow AS
SELECT MAX(Row) FROM [table name]

This is assuming SQL server as the database, change code appropriately for other RDBMS of course.

Russell
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