What is the unusual behavior of a SQL Server and T-SQL when dealing with a multi-value INSERT INTO statement and a sql_variant type column?

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When dealing with a multi-value INSERT INTO statement and a sqlvariant type column, the SQL Server and T-SQL may exhibit the unusual behavior of automatically converting certain data types to other data types without warning or error messages. For example, if one of the values being inserted into a sqlvariant column is a float data type, the SQL Server may automatically convert it to a decimal data type. Similarly, if one of the values being inserted is a date data type, the SQL Server may convert it to a datetime data type. This behavior can lead to unexpected results and data inconsistencies. Therefore, it is important to be aware of this behavior when working with sql_variant columns and to explicitly cast data types as needed to ensure consistent results.