Question

我有以下sql：

;WITH DatesCTE AS 
(
   SELECT CAST('2016-01-01' AS DATE) AS [workingDays]

   UNION ALL

   SELECT DATEADD(DAY, 1, workingdays)
   FROM DatesCTE
   WHERE DATEADD(DAY, 1, workingdays) < '2017-01-01'
)
insert into dbo.tWorkingDays
     (date,
     CASE ((DATEPART(dw, workingDays) + @@DATEFIRST) % 7) NOT IN (0, 1) when TRUE THEN 1,
        ELSE 0
    END
    )
SELECT *
FROM DatesCTE
WHERE ((DATEPART(dw, workingDays) + @@DATEFIRST) % 7) NOT IN (0, 1)
OPTION (MAXRECURSION 366)

和下表：

CREATE TABLE [dbo].[tWorkingDays]
(
    [date] [date] NOT NULL,
    [is_business_day][bit] NOT NULL DEFAULT 1,

    CONSTRAINT [PK_tWorkingDays] 
       PRIMARY KEY CLUSTERED ([date] ASC)
) ON [PRIMARY]

当我尝试执行请求时，我会看到以下内容：

Msg 156，Level 15，State 1，Line 14
关键字＆＃39; CASE＆＃39;附近的语法不正确。

我做错了什么？

Answer 1

看起来你得到的字段列表（你要插入的字段）与选择列表（你要插入的值）混在一起。它应该是这样的：

;WITH DatesCTE
 AS (

   SELECT CAST('2016-01-01' AS DATE) AS [workingDays]
   UNION ALL

   SELECT DATEADD(DAY, 1, workingdays)
   FROM DatesCTE
   WHERE DATEADD(DAY, 1, workingdays) < '2017-01-01'

)
insert into dbo.tWorkingDays
     (date, is_business_day)
SELECT workingDays,
     CASE WHEN ((DATEPART(dw, workingDays) + @@DATEFIRST) % 7) NOT IN (0, 1) THEN 1 ELSE 0
    END
FROM DatesCTE
WHERE ((DATEPART(dw, workingDays) + @@DATEFIRST) % 7) NOT IN (0, 1)
OPTION (MAXRECURSION 366)

您可能不希望在同一查询中使用WHERE子句和CASE，但引用的代码至少应解决语法错误。

Answer 2

   ;WITH DatesCTE AS (
       SELECT CAST('20160101' AS DATE) AS [workingDays]
       UNION ALL

       SELECT DATEADD(DAY, 1, workingdays)
       FROM DatesCTE
       WHERE DATEADD(DAY, 1, workingdays) < '2017-01-01'
    )
    INSERT INTO dbo.tWorkingDays (date, is_business_day)
    SELECT *, CASE WHEN (DATEPART(dw, workingDays) + @@DATEFIRST) % 7 NOT IN (0, 1) THEN 1 ELSE 0 END
    FROM DatesCTE
    --WHERE (DATEPART(dw, workingDays) + @@DATEFIRST) % 7 NOT IN (0, 1)
    OPTION (MAXRECURSION 366)

SQL Server：插入

2 个答案: