getting all chars before space in SQL SERVER

Question

i am trying to get all chars before the space:

SUBSTRING(reporttime,1,CHARINDEX(reporttime,' ',1))

but it is not working. please help!

example data:

7/8/2010 11:47 AM
7/8/2010 10:55 AM

Answer 1

Select Substring( MyTextColumn, 1, CharIndex( ' ', MyTextColumn ) - 1)

Actually, if these are datetime values, then there is a better way:

Select Cast(DateDiff(d, 0, MyDateColumn) As datetime)