避免显式转换为浮动？

Question

能

SELECT CAST(2.083 AS float) AS c

以更紧凑的方式编写？

就像是

SELECT 2.083f AS c

?

Answer 1

为避免显式CAST为float ，请指定浮点常量表达式：

--these both return float with precision 53
EXEC sp_describe_first_result_set N'SELECT CAST(2.083 AS float) AS c;';
EXEC sp_describe_first_result_set N'SELECT 2.083E0 AS c;';

--without scientific notation, the constant is interpreted as numeric(4,3)
EXEC sp_describe_first_result_set N'SELECT 2.083 AS c;';