Question

运行此查询时出错：

SELECT '06/30/' + 
 CASE WHEN GETDATE() BETWEEN Cast('1/01/' + YEAR(GETDATE()) + ' 12:01:01' As DateTime) And Cast('6/30/' + YEAR(GETDATE()) + ' 12:01:01' as DateTime)
      THEN CAST(
           YEAR(DATEADD(YY, 2, GETDATE())) AS VARCHAR(4))
      WHEN GETDATE() BETWEEN Cast('7/01/' + YEAR(GETDATE()) + ' 12:01:01' As DateTime) And Cast('12/31/' + YEAR(GETDATE()) + ' 12:01:01' as DateTime)
      THEN CAST(
           YEAR(DATEADD(YY, 3, GETDATE())) AS VARCHAR(4))
      END
      AS DateEnding FOR XML RAW

Conversion failed when converting the varchar value '1/01/' to data type int.

Answer 1

在尝试将其与文本组合时，您需要将YEAR(GETDATE()) CAST或CONVERT到varchar（4），否则，它会尝试将文本转换为int。

SELECT '06/30/' + 
 CASE WHEN GETDATE() BETWEEN Cast('1/01/' + CAST(YEAR(GETDATE()) AS VARCHAR(4)) + ' 12:01:01' As DateTime) And Cast('6/30/' + CAST(YEAR(GETDATE()) AS VARCHAR(4)) + ' 12:01:01' as DateTime)
      THEN CAST(
           YEAR(DATEADD(YY, 2, GETDATE())) AS VARCHAR(4))
      WHEN GETDATE() BETWEEN Cast('7/01/' + CAST(YEAR(GETDATE()) AS VARCHAR(4)) + ' 12:01:01' As DateTime) And Cast('12/31/' + CAST(YEAR(GETDATE()) AS VARCHAR(4)) + ' 12:01:01' as DateTime)
      THEN CAST(
           YEAR(DATEADD(YY, 3, GETDATE())) AS VARCHAR(4))
      END
      AS DateEnding FOR XML RAW

Answer 2

JamieSee将其转换为VARCHAR（4）是正确的。更好的方法是使用非模糊日期进行格式化。 SQL将永远在2012年6月30日的2012年6月30日，但是在7月1日（美国格式）或1月7日（英国格式）的1/7/2012？

SELECT '06/30/' + 
 CASE WHEN GETDATE() BETWEEN Cast(CAST(YEAR(GETDATE()) AS VARCHAR(4)) + '-01-01 12:01:01' As DateTime) And Cast(CAST(YEAR(GETDATE()) AS VARCHAR(4)) + '-06-30 12:01:01' as DateTime)
      THEN CAST(
           YEAR(DATEADD(YY, 2, GETDATE())) AS VARCHAR(4))
      WHEN GETDATE() BETWEEN Cast(CAST(YEAR(GETDATE()) AS VARCHAR(4)) + '-07-01 12:01:01' As DateTime) And Cast(CAST(YEAR(GETDATE()) AS VARCHAR(4)) + '-12-31 12:01:01' as DateTime)
      THEN CAST(
           YEAR(DATEADD(YY, 3, GETDATE())) AS VARCHAR(4))
      END
      AS DateEnding FOR XML RAW

使用/ SQL检查日期之间的日期

2 个答案: