SQL Server – Best Practices – Always use precise decimal data-types
'I recently came across a concrete example of something that has always been maintained as a best practice – when working on items that are sensitive to decimal precision, always use precise data-types like DECIMAL instead of FLOAT or REAL.
The following example clearly demonstrates that using a FLOAT in mathematical calculations may change the outcome of the computation. For financial calculations, this would mean incorrect reporting of revenues.'...
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