Question

我之前已经看过这个问题，但是无法确定如何更改此查询以更新实际上在WHERE子句中使用的SELECT语句中返回的字段（clientid，program，startdate和enddate）。如何执行此操作的任何示例都将非常有帮助。谢谢。

UPDATE baycare_homecare
SET
  IsApproved = 1
 ,ProcessDate = GETDATE()
 ,clientid = c.ClientID
 ,program = cp1.Description
 ,startdate = cp.startdate
 ,enddate = cp.enddate
WHERE
  Processdate IS NULL
  AND baycare_homecare.patient_ssn IN
      (
        SELECT
          c.socialsecuritynumber
        FROM
          carescope_live.dbo.client AS c
         ,carescope_live.dbo.client_program AS cp
        LEFT JOIN
          carescope_live.dbo.Code_Program AS cp1
            ON
            cp1.ULink = cp.ProgramULink
        WHERE
          c.ulink = cp.clientulink
          AND baycare_homecare.service_date 
            BETWEEN 
              DATEADD(ss, 1, DATEADD(d, -1, cp.startdate)) 
              AND 
              DATEADD(ss, -1, DATEADD(d, +1, cp.enddate))
      );

Answer 1

我无法测试，但是我相信这就是你所追求的：

UPDATE bh
SET IsApproved=1
   ,ProcessDate = GETDATE()
   ,clientid = c.ClientID
   ,program = cp1.Description
   ,startdate = cp.startdate
   ,enddate = cp.enddate
FROM baycare_homecare bh
     JOIN carescope_live.dbo.client AS c ON bh.patient_ssn = c.socialsecuritynumber
     JOIN carescope_live.dbo.client_program AS cp ON c.ulink = cp.clientulink
                                                 AND bh.service_date BETWEEN DATEADD(ss, 1, DATEADD(d, -1, cp.startdate)) AND DATEADD(ss, -1, DATEADD(d, +1, cp.enddate)) --this isn't SARGable
     LEFT JOIN carescope_live.dbo.Code_Program AS cp1 ON cp1.ULink = cp.ProgramULink
WHERE Processdate IS NULL;

请注意，您要做的是一个带有您的FROM和别名的“正常” JOIN子句。然后，为您的UPDATE子句引用别名。然后，您可以引用其他对象中具有各自别名的列，就像在SELECT中一样。

Answer 2

您可以这样做

UPDATE b
SET IsApproved = 1
    , ProcessDate = GETDATE()
    , clientid = a.ClientID
    , program = a.Description
    , startdate = a.startdate
    , enddate = a.enddate
FROM baycare_homecare b
JOIN (
    SELECT c.socialsecuritynumber, c.ClientID, program = cp1.Description, startdate = cp.startdate, enddate = cp.enddate
    FROM carescope_live.dbo.client AS c
    JOIN carescope_live.dbo.client_program AS cp ON c.ulink = cp.clientulink
    LEFT JOIN carescope_live.dbo.Code_Program AS cp1 ON cp1.ULink = cp.ProgramULink
    WHERE baycare_homecare.service_date BETWEEN DATEADD(ss, 1, DATEADD(d, -1, cp.startdate)) AND DATEADD(ss, -1, DATEADD(d, +1, cp.enddate))
) a ON a.socialsecuritynumber = b.patient_ssn
WHERE b.ProcessDate IS NULL

更新的查询：

UPDATE b
SET IsApproved = 1
    , ProcessDate = GETDATE()
    , clientid = a.ClientID
    , program = a.Description
    , startdate = a.startdate
    , enddate = a.enddate
FROM baycare_homecare b
JOIN (
    SELECT c.socialsecuritynumber, c.ClientID, program = cp1.Description, startdate = cp.startdate, enddate = cp.enddate
    FROM carescope_live.dbo.client AS c
    JOIN carescope_live.dbo.client_program AS cp ON c.ulink = cp.clientulink
    LEFT JOIN carescope_live.dbo.Code_Program AS cp1 ON cp1.ULink = cp.ProgramULink
) a ON a.socialsecuritynumber = b.patient_ssn AND b.service_date BETWEEN DATEADD(ss, 1, DATEADD(d, -1, a.startdate)) AND DATEADD(ss, -1, DATEADD(d, +1, a.enddate))
WHERE b.ProcessDate IS NULL

从WHERE子句中SELECT中的数据更新查询字段

2 个答案: