保留十位有效数字

SQL四舍五入保留浮点数的十位有效数字 无 DECLARE @execsql NVARCHAR(1024)SET @execsql =N’SELECT CAST(‘+CAST(125.365412354 AS NVARCHAR(20)) +N’ AS NUMERIC (20,’+STR(10-CEILING(LOG10(125.365412354)))+N’))’EXEC SP_EXECUTESQL @execsql /*ROUND?(?nu

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DECLARE @execsql NVARCHAR(1024)SET @execsql =N'SELECT CAST('+CAST(125.365412354 AS NVARCHAR(20)) +N' AS NUMERIC (20,'+STR(10-CEILING(LOG10(125.365412354)))+N'))'EXEC SP_EXECUTESQL @execsql

/*ROUND?(?numeric_expression?,?length?[?,function?]?)function?必须为?tinyint、smallint??或?int。如果省略?function?或其值为?0（默认值），则将舍入?numeric_expression。如果指定了0以外的值，则将截断?numeric_expression。*/SELECT?ROUND(150.45648,?2);--保留小数点后两位，需要四舍五入SELECT?ROUND(150.45648,?2,?0);--保留小数点后两位，0为默认值，表示进行四舍五入SELECT?ROUND(150.45648,?2,?1);--保留小数点后两位，不需要四舍五入，这里除0以外都是有同样的效果SELECT?ROUND(150.45648,?2,?2);--保留小数点后两位，不需要四舍五入，这里除0以外都是有同样的效果--150.46000--150.45000--150.45000--150.45000

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