Data quality in SQL Server // TRY_CONVERT for float and real done safely
Data quality with floating-point columns is a discipline of its own — and TRY_CONVERT(float, …) has a few quirks that tend to slip past the import path: an empty string becomes 0 (not NULL), a comma as decimal separator yields NULL, and even after a clean conversion 2 + 3.4 – 3.4 – 2 does not return exactly 0 as a float. This article sorts out the … Read more