sql server - Incorrect conversion from Float to Decimal -


my query relatively simple know root cause

sql query convert float decimal gives incorrect results.

example:

select cast(convert(decimal(25,8), convert(float,338193293.16))as varchar(255))

expected result: 338193293.16000000

actual result: 338193293.16000003

where did 3come from?

the number of digits - no matter after decimal point 2. use shorter number e.g. 38193293.16 or use float(24). normal float there "precision = 7 digits".


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