Delete into SQL Server loop -

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in case of repetition periods, need delete second occurrence (15 15 minutes), query returns or nothing.

declare @datatetemp date declare @horatetemp time  declare cursor_i cursor select datate, horate @table  open cursor_i fetch next cursor_i @datatetemp, @horatetemp;  while @@fetch_status = 0     begin          if  (select count(*) @table horate = dateadd(minute, -15, @horatetemp)) > 0         --dateadd(minute, -15, @horatetemp) = @horatetemp         begin             delete @table current of cursor_i         end          fetch next cursor_i @datatetemp, @horatetemp     end  close cursor_i; deallocate cursor_i;

another:

declare @aux time = dateadd(minute, -15, @horatetemp) if  (select count(*) @table oito oito.horate = @aux) > 0

would never possible applying as:

select [...] cross apply dbo.function(dat, hor) [...]

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