Converting SQL FLOAT to SQL INT, lost data

Question

I\'m having some problems with converting some data stored in a FLOAT datatype to data stored in an INT datatype. The below example illustrates my problem:

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Answer 1

This is common behaviour for float data type due to specificity of float on computers. Use decimal (number) data type with fixed digits after decimal point. For example, decimal(10, 6).

Answer 2

This is the classic (int)((0.1+0.7)*10) problem. Because floats have arbitrary precision some data loss when casting to int is possible even for very simple cases.

Use ROUND(weight * 1000000.0, 0) instead.