Tag: Implicit Conversion

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SQL

Repercussions of Implicit Conversion

Implicit conversion happens in SQL Server when the engine detects a mismatch in data types and automatically converts from one type to another. This can be helpful as it makes different types interchangeable and is generally transparent to the client, but it can come with issues. Usually the downside from implicit conversion is seen through […]

Categories
SQL

Resulting Data Types from Union Operations

The UNION and UNION ALL operators allow us to combine results, but there’s no guarantee that each set of results uses the same data types. So what data types are returned? For the longest time I thought the data types from the first set of results were used for the final results. That’s not the case. Understanding how this […]