Question

我正在处理一个视图（最初不是由我自己创建的），我正在尝试做的是返回请求（表别名req），没有分配给他们的时间（表别名te），我有点难以获得任何类型的外连接在以下sql上返回：

SELECT 
te.tc_date_yyyy_ww, 
te.tc_date_yyyy_mm, 
te.tc_date_yyyy, 
te.dc_date,
te.nc_request_id_fk, 
te.nc_subrequest_id_fk, 
te.tc_clock,
te.nc_hours, 
te.nc_amount, 
te.nc_discipline_id_fk,
te.tc_discipline_desc, 
req.tc_request_name, 
req.mc_project_cost,
req.nt_fetr_project, 
req.nc_bus_unit_id_fk, 
req.nc_location_id_fk,
req.nc_cemt_status_id_fk,
coord.tc_user_fname || ' ' || coord.tc_user_lname AS projectcoodname,
assoc.tc_fname || ' ' || assoc.tc_lname AS empname,
assoc_disc.tc_long_desc AS user_discipline,
sr.tc_name AS child_project, 
sr.tc_cost_center_or_wbs,
sr.tc_cost_center_nbr, 
sr.tc_cost_center_desc,
sr.tc_profit_center_desc, 
sr.tc_profit_center_nbr, 
sr.tc_wbs_nbr,
sr.tc_wbs_desc, 
sr.nc_child_type_id_fk, 
sre.nc_estimate,
stat_li.tc_med_desc AS req_status,
NVL(PP.NC_PRIORITY,0) AS PRIORITY
 FROM te07fear.tbye10_time_entry te,
      te07fear.tbxg100_requests req,
      (SELECT *
         FROM te07fear.tbye05_form_users
        WHERE tc_role_id_fk = 'project_coordinator') coord,
      te07fear.tbye07_subrequest sr,
      te07fear.tbye08_subrequest_est sre,
      te07fear.tbye02_list_items stat_li,
      te07fear.tbye04_associates assoc,
      te07fear.tbxg95_dropdowns assoc_disc,
      TE07FEAR.TBYF43_PROJECT_PRIORITY PP
WHERE 
    te.tc_clock = assoc.tc_clock
  AND 
    te.nc_subrequest_id_fk = sr.nc_subrequest_id(+)
  AND 
    te.nc_subrequest_id_fk = sre.nc_subrequest_id_fk(+)
  AND 
    te.tc_clock = sre.tc_clock(+)
  AND 
    te.nc_request_id_fk = req.nc_request_id
  AND 
    te.nc_request_id_fk = coord.nc_form_id_fk
  AND 
    assoc.nc_discipline_id_fk = assoc_disc.nc_key_id
  AND 
    req.nc_cemt_status_id_fk = stat_li.nc_value_id
  AND
    TE.NC_REQUEST_ID_FK = PP.NC_REQUEST_ID_FK
  AND
    TE.NC_SUBREQUEST_ID_FK = PP.NC_SUB_REQUEST_ID_FK
  AND
    TE.TC_DATE_YYYY_WW = PP.TC_DATE_YYYY_WW
  AND
    TE.TC_CLOCK = PP.TC_CLOCK_NUMBER

任何帮助或想法都会非常感激。我假设左外连接应该让我能够做到这一点。

由于 JC

Answer 1

据我了解，你实际上需要NOT EXISTS子句，而不是外连接。这是一个简化的代码段，向您展示我的意思（跳过大部分查询，但您已经明白了这一点）：

SELECT req.tc_request_name, 
       req.mc_project_cost,
       req.nt_fetr_project, 
       req.nc_bus_unit_id_fk, 
       req.nc_location_id_fk,
       req.nc_cemt_status_id_fk
  FROM te07fear.tbxg100_requests req
 WHERE NOT EXISTS (select 1
                     from te07fear.tbye10_time_entry te
                    where te.nc_request_id_fk = req.nc_request_id)
;

如果情况确实如此，请告知我们是否符合此目的。

干杯

Oracle sql问题，返回在表连接上具有空值的行

1 个答案: