SQL查詢分組：

Question

粘貼當前正在使用的sql查詢以從unix shell腳本生成報告。我想在下面的sql查詢中添加一列COUNT（cdw.file_id）writeoffcnt，它顯示與mg_disp_status = 0和mig_disp_code = 3相匹配的記錄的 計數。 現有字段COUNT（cdw.file_id）cnt應具有匹配 mg_disp_status = 1和mig_disp_code <> 2的記錄計數。如何修改查詢？

SELECT fs.file_id, 
       fs.file_id_serv, 
       fs.file_process_dt, 
       fs.file_name, 
       fs.total_records, 
       RTRIM (d.description_text) source, 
       SUM(amount), 
       COUNT (cdw.file_id) cnt 
      FROM file_status fs, 
       dr_data_work cdw, 
       descriptions d, 
       contacts ec 
      WHERE file_process_dt >= TO_DATE ('${START_DATE}', 'DD-MON-YYYY') 
       AND file_process_dt < TO_DATE ('${END_DATE}', 'DD-MON-YYYY') 
       AND fs.ext_contact_id = ec.ext_contact_id 
       -- 
       AND ec.description_code = d.description_code 
       AND cdw.file_id = fs.file_id 
       AND mg_disp_status = 1 
       AND mig_disp_code <> 2 
     GROUP BY fs.file_id, 
       fs.file_id_serv, 
       fs.file_process_dt, 
       fs.file_name, 
       fs.total_records, 
       RTRIM (d.description_text); 

Answer 1

我不完全理解你的要求，所有排列，但像下面應該工作：

SELECT 
. 
. 
. 
SUM(CASE mg_disp_status=0 and mig_disp_code =3 THEN 1 ELSE 0 END) cnt1, 
SUM(CASE mg_disp_status=1 and mig_disp_code <> 2 THEN 1 ELSE 0 END) cnt2, 

Answer 2

與不同的別名加入兩次，做你的罪狀：

SELECT fs.file_id, 
      fs.file_id_serv, 
      fs.file_process_dt, 
      fs.file_name, 
      fs.total_records, 
      RTRIM (d.description_text) source, 
      SUM(amount), 
      COUNT (cdw.file_id) cnt1, COUNT (cdw2.file_id) cnt2 
     FROM file_status fs, 
      dr_data_work cdw, dr_data_work cdw2, 
      descriptions d, 
      contacts ec 
     WHERE file_process_dt >= TO_DATE ('${START_DATE}', 'DD-MON-YYYY') 
      AND file_process_dt < TO_DATE ('${END_DATE}', 'DD-MON-YYYY') 
      AND fs.ext_contact_id = ec.ext_contact_id 
      -- 
      AND ec.description_code = d.description_code 
      AND cdw.file_id = fs.file_id AND cdw2.file_id = fs.file_id 
      AND cdw.mg_disp_status = 1 AND cdw2.mg_disp_status = 0 
      AND cdw.mig_disp_code <> 2 AND cdw2.mg_disp_code = 3 



    GROUP BY fs.file_id, 
      fs.file_id_serv, 
      fs.file_process_dt, 
      fs.file_name, 
      fs.total_records, 
      RTRIM (d.description_text);