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Start your free trialNicole Buckenwolf
8,721 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
8,721 PointsAwesome, thank you for confirming!