Question

我有一个CTE，可以根据给定的用户ID和特定的日期范围将每个用户ID的每条记录显示为水平（而不是通常的“列出”方式）。我正在努力寻找一种显示给定记录的方法，因为有时在那个时期用户没有注册，但是我仍然需要知道他是否注册。我可以手动检查，但有时我会获得200多个ID。

这就是我当前代码所得到的

id reg1 reg2 reg3
-----------------
x  a    b    c

这就是我的期望

id reg1 reg2 reg3
-----------------
x  a    b    c
y  NULL NULL NULL -- 'y' doesn't exists, ergo, it should display the id and nulls on the rest of columns.

我的代码

;WITH CTE AS(
   SELECT PER_PRO, ID_HR, NOM_INC, rut_dv, dias_durAC, INI, FIN,
       ROW_NUMBER()OVER(PARTITION BY ID_HR ORDER BY ULT_ACT) AS RN
   FROM dbo.inf_lic WHERE PER_PRO = --GIVEN DATE PERIOD
)
SELECT ID_HR,rut_dv,NOM_INC,
       max(case when rn = 1 then DIAS_DURAC end) as DIAS_DUR1,
       max(case when rn = 1 then INI end) as INI1,
       max(case when rn = 1 then FIN end) as FIN1,

       max(case when rn = 2 then DIAS_DURAC end) as DIAS_DUR2,
       max(case when rn = 2 then INI end) as INI2,
       max(case when rn = 2 then FIN end) as FIN2,

       max(case when rn = 3 then DIAS_DURAC end) as DIAS_DUR3,
       max(case when rn = 3 then INI end) as INI3,
       max(case when rn = 3 then FIN end) as FIN3,

       max(case when rn = 4 then DIAS_DURAC end) as DIAS_DUR4,
       max(case when rn = 4 then INI end) as INI4,
       max(case when rn = 4 then FIN end) as FIN4
FROM CTE
WHERE RUT_DV in (/*GIVEN VALUES*/) 
GROUP BY ID_HR,RUT_DV, NOM_INC;

Answer 1

我建议使用“定期”标志，该标志可以与RN组合使用：

WITH CTE AS(
      SELECT l.*,
             (CASE WHEN PER_PRO = ?
                   THEN ROW_NUMBER() OVER (PARTITION BY ID_HR ORDER BY ULT_ACT)
              END) as rn
      FROM dbo.inf_lic l
     )
SELECT ID_HR,rut_dv,NOM_INC,
       max(case when rn = 1 then DIAS_DURAC end) as DIAS_DUR1,
       max(case when rn = 1 then INI end) as INI1,
       max(case when rn = 1 then FIN end) as FIN1,

       max(case when rn = 2 then DIAS_DURAC end) as DIAS_DUR2,
       max(case when rn = 2 then INI end) as INI2,
       max(case when rn = 2 then FIN end) as FIN2,

       max(case when rn = 3 then DIAS_DURAC end) as DIAS_DUR3,
       max(case when rn = 3 then INI end) as INI3,
       max(case when rn = 3 then FIN end) as FIN3,

       max(case when rn = 4 then DIAS_DURAC end) as DIAS_DUR4,
       max(case when rn = 4 then INI end) as INI4,
       max(case when rn = 4 then FIN end) as FIN4
FROM CTE
WHERE RUT_DV in (/* GIVEN VALUES */) 
GROUP BY ID_HR, RUT_DV, NOM_INC;

使用IN运算符时显示所有给定的ID

1 个答案: