The conversion of a nvarchar data type to a datetime data type resulted in an out-of-range value.

Question

Below select statement results in "The conversion of a nvarchar data type to a datetime data type resulted in an out of range value"   error. By the way Terms
field's data type is nvarchar
 SELECT * from INVOICE
where convert(datetime,Terms) 
BETWEEN
'01/01/14'
and
'01/30/15' 

Answer 1

If you can't use TRY_CONVERT (It's only available in 2012+) You should be able to validate the data with something like this (based on your example date formats):
DECLARE @notDate TABLE (Terms NVARCHAR(10))
INSERT INTO @notDate (Terms) VALUES
('01/01/14'),('02/29/14'),('01/32/15'),('13/13/14'),('13/3/14'),('13-13/14'),('02/29/12'),('02/29/13')
SELECT *,
CASE WHEN (LEN(Terms) - 2) <> LEN(REPLACE(Terms,'/','')) OR LEN(Terms) <> 8 THEN 'Bad Form'
WHEN LEFT(Terms,2) > 12 THEN 'Bad Month'
WHEN LEFT(Terms,2) IN (9,4,6,11) AND LEFT(RIGHT(Terms,5),2) > '30' THEN 'Bad Day'
WHEN LEFT(Terms,2) = 2 AND LEFT(RIGHT(Terms,5),2) > (28 + CASE WHEN (2000+RIGHT(Terms,2)) % 400 = 0 THEN 1 WHEN (2000+RIGHT(Terms,2)) % 100 = 0 THEN 0 WHEN (2000+RIGHT(Terms,2)) % 4 = 0 THEN 1 ELSE 0 END) THEN 'Bad Day'
WHEN LEFT(Terms,2) NOT IN (2,9,4,6,11) AND LEFT(RIGHT(Terms,5),2) > '31' THEN 'Bad Day'
END
FROM @notDate
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