HOW TO CHECK EMPTY TABLE

Question

HOW TO CHECK EMPTY TABLE

SivaKumar-277675

SSC Journeyman

Points: 93
More actions
November 16, 2005 at 7:14 am

#88497

i want to check whether there is data in a particular table
that query which is also coming from another table so i m fetching through cursor
i wrote one batch but its giving error near exec can anybody of u correct this
i dont know how many columns that table contains
declare @query nvarchar(200)
declare cs cursor for select query from order
open cs
while @@fetch_status=0
begin
if exists(exec(@query)
/*some business logic*/
fetch next from cs into @query
end
close cs
deallocate cs

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venkat-216866 SSC Veteran Points: 257 More actions · Answer 1

If we see the cursor that you have wrote then explicitly there are some errors,but first i would like to know what you would like to do.. i mean can you explain the logic with a simple example .. so that i can help you out...

Steve Jones - SSC Editor SSC Guru Points: 736078 More actions · Answer 2

if exists( select top 1 * from table)

will return true if there is data.

sushila SSC-Dedicated Points: 35293 More actions · Answer 3

I'm not sure I understand this at all but it seems to me that you want to know if your "exec(@query)" has returned any rows or not...if this is correct, then you would need to use @@rowcount...eg:

declare @query varchar(50)
set @query = 'select colName from myTable'
exec(@query )
if @@rowcount > 0
  begin
   process...
  end

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