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Nicole Buckenwolf
8,718 PointsQuestion about data types and MIN/MAX
I was just playing around with the SQL playground for this video and noticed that selecting for MIN(START_TIME) from the PERIODS table returns 10:44. Is that because this column has a TEXT datatype? If it were DATETIME instead, would it return the first period of the day?
2 Answers
Rohald van Merode
Treehouse StaffThat is correct Nicole Buckenwolf 💯😃
Since the type of START_TIME is set to a TEXT type it will order the values in alphabetical order. Because of that the 10 comes before the 9:.
If START_TIME was of the DATETIME datatype instead the MIN() function would have operated in the context of time comparison rather than alphabetical
Nicole Buckenwolf
8,718 PointsAwesome, thank you for confirming!