I have a table with dates that all happened in the month November. I wrote this query
select id,numbers_from,created_date,amount_numbers,SMS_text from Tes
If You are comparing only with the date vale, then converting it to date (not datetime) will work
select id,numbers_from,created_date,amount_numbers,SMS_text from Test_Table where created_date <= convert(date,'2013-04-12',102)
This conversion is also applicable during using GetDate() function