Question

i have problem with my sql.The problem is a result data from the table is not same like i put in parameter.
can you check what’s wrong with my code?.

This is my code:-

select distinct  convert(varchar(10),a.entered,103) as
daterange  from customer
where
((a.entered BETWEEN convert(varchar(10),&daterangefrom,103) AND convert(varchar(10),&daterangeto,103)) or (convert(varchar(10),&daterangefrom,103) =' ' AND convert(varchar(10),&daterangeto,103) =' '))

Answer 1

You are comparing the dates as strings, but the dd/mm/yyyy format that you are using doesn’t work for such comparisons. For example, '2/4/1976' > '1/9/2012'.

Compare the dates as dates:

select distinct convert(varchar(10),a.entered,103) as daterange
from customer
where (
  (&daterangefrom = ' ' AND &daterangeto = ' ') or
  (a.entered BETWEEN &daterangefrom AND &daterangeto)
)

Alternatively, use the ISO 8601 based yyyy-mm-dd format, which does work as string comparisons:

select distinct convert(varchar(10),a.entered,103) as daterange
from customer
where (
  (a.entered BETWEEN convert(varchar(10),&daterangefrom,120) AND convert(varchar(10),&daterangeto,120)) or
  (&daterangefrom =' ' AND &daterangeto =' ')
)