Question

接下来的情况......我没有表之间的唯一标识符来进行匹配，所以我匹配的值可以在两个表中出现多次。我觉得我必须分配一些值，然后在下一条记录试图匹配时删除可用于匹配的记录。

表1包含以下数据：

MedicationName  ID    Pt   Price  SEQ
Drug1           123   AAA  100.00  1
Drug2           345   AAA  200.00  2

Table 2 
InjectionName   ID    PT   StarDate  EndDate
Drug1           123   AAA  20170101  20991231
Drug1           123   AAA  20160417  NULL
Drug2           345   AAA  20161101  20191231

结果应该是这样的：

Medication   MedID   Price  Injection  InjID StartDate  EndDate  PT   Seq
Drug1        123     100.00  Drug1     123   20170101  20991231  AAA   1
*NULL         NULL    NULL    Drug1     123   20160417  NULL      AAA   NULL*
Drug2        345     200.00  Drug2     345   20161101  20191231  AAA   2

但我的结果是：

Medication   MedID   Price  Injection  InjID StartDate  EndDate  PT   Seq
Drug1        123     100.00  Drug1     123   20170101  20991231  AAA   1
*Drug1        123     100.00  Drug1     123   20160417  NULL      AAA   1*
Drug2        345     200.00  Drug2     345   20161101  20191231  AAA   2

我需要表明第2个表中的第2个项目在表1中没有匹配值，因为项目1已经与之匹配。

Answer 1

你需要ROW_NUMBER来分隔行..试试这个：

With Table1 As
(
          Select 'Drug1' MedicationName , 123 ID ,'AAA' Pt ,100.00 Price,1 SEQ
    Union Select 'Drug2' MedicationName , 345 ID ,'AAA' Pt ,100.00 Price,1 SEQ
),
Table2 As
(
          Select 'Drug1' InjectionName, 123 ID, 'AAA' PT, 20170101 StarDate, 20991231 EndDate
    Union Select 'Drug1' InjectionName, 123, 'AAA', 20160417, NULL
    Union Select 'Drug2' InjectionName, 345, 'AAA', 20161101, 20191231
),
Table1_Id As
(
    Select 
        Cast (Row_Number() Over (Partition By MedicationName, ID Order BY MedicationName, Id) as Int) MedicationNumber,
        MedicationName, Id, PT, Price, Seq
    From Table1
),
Table2_Id As
(
    Select 
        Cast (Row_Number() Over (Partition By InjectionName, ID Order BY InjectionName, Id) as Int) InjectionNumber,
        InjectionName, Id, PT, StarDate, EndDate
    From Table2
)
Select *
From Table1_Id T1
Full Outer Join Table2_Id T2
    On T1.MedicationName = T2.InjectionName
    And T1.ID = T2.ID
    And T1.MedicationNumber = T2.InjectionNumber

比较每个表中具有多个相同记录的2个表之间的数据

1 个答案: