sqlserver函数学习记录

–SELECT cast(10.982233 AS INT) – 10
–SELECT cast(10.776654 AS Money) – 10.7767

–SELECT cast(‘123.4’ AS INT) --报错：[SQL Server]在将 varchar 值 ‘123.4’ 转换成数据类型 int 时失败
–原因：cast()和函数convert()都不能执行四舍五入或者截断操作。

–SELECT cast(‘123.4’ AS DECIMAL(9, 4)) --123.4000
–SELECT cast(‘123.4’ AS DECIMAL(9)) --18

–SELECT CONVERT(VARCHAR(50), cast(1234.56 AS Money), 1) --1,234.56

–SELECT CONVERT(VARCHAR(50), cast(1234.56 AS Money), 2) --1234.5600