關於重新構建SQL查詢

我有以下查詢，這是一個漫長的，雖然它達到預期的效果，請告訴我有沒有其他的辦法，這樣我可以重組我的查詢..我想減少這種長查詢到更小的表格關於重新構建SQL查詢

SELECT final_lines.line_number line_number, 
     final_lines.line_desc line_desc, 
     Sum(final_lines.value) value 
FROM (SELECT main.line_code       line_number, 
       main.line_desc       line_desc, 
       (COALESCE(main.net_sales, 0) 
       + COALESCE(paid_out.paidout_amt, 0)) value 
     FROM (SELECT t.line_num  line_num, 
         t.line_code  line_code, 
         t.line_desc  line_desc, 
         Sum(t.net_sales) net_sales 
       FROM (SELECT pstl.prgp_id     AS line_num, 
           line.prgp_code     AS line_code, 
           line.prgp_desc     AS line_desc, 
           COALESCE(Sum(txn.txn_sales), 0) AS Net_Sales 
         FROM prodgp_str_link pstl 
           JOIN prodgp_structure pstr 
           ON pstl.pstr_id = pstr.pstr_id 
           JOIN product_group line 
           ON line.prgp_id = pstl.prgp_id 
           LEFT JOIN prod_pgrp_link ppgl 
             ON pstl.prgp_child_id = ppgl.prgp_id 
           LEFT JOIN product prd 
             ON prd.prod_id = ppgl.prod_id 
           LEFT JOIN (SELECT dtl.txde_sku_code sku_code, 
               CASE 
                WHEN dtl.txde_level5_id IN ( 
                 'D100-5', 'D100-4', 
                 'D100-7', 
                 'D100-6', 
                 'D11-11', 'D11-1', 
                 'D5-1', 
                 'D5-5', 
                 'D100-10', 'D100-11', 
                 'D100-69' 
                 , 'D100-9' 
                 , 
                 'D100-100', 'D5-69', 
                 'D100-8', 
                 'D11-69', 
                 'D100-1', 'D100-3', 
                 'D100-2') 
                   THEN 
                COALESCE (Sum( 
                CASE 
                WHEN dtl.txde_line_refund 
= 
                  0 THEN 
                dtl.txde_price_sold * 
                dtl.txde_quantity_sold 
                ELSE dtl.txde_price_sold * 
       dtl.txde_quantity_sold *- 1 
       END), 0) 
       ELSE COALESCE(Sum(CASE 
       WHEN dtl.txde_line_refund = 0 
       THEN 
       dtl.txde_value_line 
       ELSE dtl.txde_value_line *- 1 
       END), 0) 
       END    txn_sales 
       FROM txn_detail dtl 
       JOIN txn_header hdr 
       ON dtl.orgu_code_cmpy = hdr.orgu_code_cmpy 
       AND dtl.orgu_code = hdr.orgu_code 
       AND dtl.till_short_desc = hdr.till_short_desc 
       AND dtl.txhd_txn_nr = hdr.txhd_txn_nr 
       JOIN txn_header_wag txhw 
       ON hdr.orgu_code_cmpy = txhw.orgu_code_cmpy 
       AND hdr.orgu_code = txhw.orgu_code 
       AND hdr.till_short_desc = txhw.till_short_desc 
       AND hdr.txhd_txn_nr = txhw.txhd_txn_nr 
       WHERE hdr.txhd_txn_type IN (3, 8) 
       AND dtl.txde_detail_type IN ( 
       '1', '2', '3', '201', 
       '202', '203', '204', '205', 
       '206', '207', '208', '210', 
       '211') 
       AND txhw.txhw_processed_date = '20121112' 
       AND hdr.txhd_state = 0 
       AND hdr.txhd_training_mode = 0 
       AND hdr.txhd_voided = 0 
       AND dtl.txde_item_void = 0 
       GROUP BY dtl.txde_sku_code, 
       dtl.txde_level5_id) txn 
       ON prd.prod_sku = txn.sku_code 
       WHERE pstl.pstr_id = 3 
       AND pstr.pstr_is_live = 1 
       AND pstl.prgp_parent_id = 0 
       AND line.prgp_code IN ('30', '50', '60') 
       GROUP BY pstl.prgp_id, 
       line.prgp_code, 
       line.prgp_desc 
       UNION ALL 
       SELECT pstl.prgp_id      AS line_num, 
       line.prgp_code     AS line_code, 
       line.prgp_desc     AS line_desc, 
       COALESCE(Sum(txn5.txn_sales), 0) AS Net_Sales 
       FROM prodgp_str_link pstl 
       JOIN prodgp_structure pstr 
       ON pstl.pstr_id = pstr.pstr_id 
       JOIN product_group line 
       ON line.prgp_id = pstl.prgp_id 
       LEFT JOIN product_group child 
       ON pstl.prgp_child_id = child.prgp_id 
       LEFT JOIN (SELECT 
       dtl.txde_level5_id level5id, 
       CASE 
       WHEN dtl.txde_level5_id IN ( 
       'D100-5', 'D100-4', 'D100-7', 
       'D100-6', 
       'D11-11', 'D11-1', 'D5-1', 
       'D5-5', 
       'D100-10', 'D100-11', 'D100-69' 
       , 'D100-9' 
       , 
       'D100-100', 'D5-69', 'D100-8', 
       'D11-69', 
       'D100-1', 'D100-3', 'D100-2') 
        THEN 
       COALESCE (Sum(CASE 
       WHEN dtl.txde_line_refund = 0 THEN 
       dtl.txde_price_sold * 
       dtl.txde_quantity_sold 
       ELSE dtl.txde_price_sold * 
       dtl.txde_quantity_sold *- 1 
       END), 0) 
       ELSE COALESCE(Sum(CASE 
       WHEN dtl.txde_line_refund = 0 
       THEN 
       dtl.txde_value_line 
       ELSE dtl.txde_value_line *- 1 
       END), 0) 
       END    txn_sales 
       FROM txn_detail dtl 
       JOIN txn_header hdr 
       ON dtl.orgu_code_cmpy = hdr.orgu_code_cmpy 
       AND dtl.orgu_code = hdr.orgu_code 
       AND dtl.till_short_desc = hdr.till_short_desc 
       AND dtl.txhd_txn_nr = hdr.txhd_txn_nr 
       LEFT JOIN txn_taxes tax 
       ON dtl.orgu_code_cmpy = tax.orgu_code_cmpy 
       AND dtl.orgu_code = tax.orgu_code 
       AND dtl.till_short_desc = 
       tax.till_short_desc 
       AND dtl.txhd_txn_nr = tax.txhd_txn_nr 
       AND dtl.txde_detail_nr = tax.txtx_detail_nr 
       JOIN txn_header_wag txhw 
       ON hdr.orgu_code_cmpy = txhw.orgu_code_cmpy 
       AND hdr.orgu_code = txhw.orgu_code 
       AND hdr.till_short_desc = txhw.till_short_desc 
       AND hdr.txhd_txn_nr = txhw.txhd_txn_nr 
       WHERE hdr.txhd_txn_type IN (3, 8) 
       AND dtl.txde_level5_id IS NOT NULL 
       AND dtl.txde_sku_code IS NULL 
       AND dtl.txde_detail_type IN ( 
       '1', '2', '3', '201', 
       '202', '203', '204', '205', 
       '206', '207', '208', '210', 
       '211') 
       AND txhw.txhw_processed_date = '20111212' 
       AND hdr.txhd_state = 0 
       AND hdr.txhd_training_mode = 0 
       AND hdr.txhd_voided = 0 
       AND dtl.txde_item_void = 0 
       GROUP BY dtl.txde_level5_id) txn5 
       ON child.prgp_code = txn5.level5id 
       WHERE pstl.pstr_id = 3 
       AND pstr.pstr_is_live = 1 
       AND pstl.prgp_parent_id = 0 
       AND line.prgp_code IN ('30', '50', '60') 
       GROUP BY pstl.prgp_id, 
       line.prgp_code, 
       line.prgp_desc) t 
       GROUP BY t.line_num, 
          t.line_code, 
          t.line_desc 
       ORDER BY t.line_code) main 
       LEFT JOIN (SELECT t.line_code  line_code, 
           t.line_desc  line_desc, 
           Sum(t.net_sales) paidout_amt 
          FROM (SELECT pstl.prgp_id     AS 
             line_num, 
             line.prgp_code     AS 
             line_code, 
             line.prgp_desc     AS 
             line_desc, 
             COALESCE(Sum(txn.txn_sales), 0) AS 
             Net_Sales 
            FROM prodgp_str_link pstl 
             JOIN prodgp_structure pstr 
              ON pstl.pstr_id = pstr.pstr_id 
             JOIN product_group line 
              ON line.prgp_id = pstl.prgp_id 
             LEFT JOIN prod_pgrp_link ppgl 
               ON pstl.prgp_child_id = 
                ppgl.prgp_id 
             LEFT JOIN product prd 
               ON prd.prod_id = ppgl.prod_id 
             LEFT JOIN (SELECT dtl.txde_sku_code 
                  sku_code 
                  , 
                  COALESCE( 
                Sum(hdr.txhd_value_nett), 0) 
                  txn_sales 
                FROM txn_detail dtl 
                  JOIN txn_header hdr 
                  ON 
                dtl.orgu_code_cmpy = 
                hdr.orgu_code_cmpy 
                AND 
                dtl.orgu_code = 
hdr.orgu_code 
                   AND 
                dtl.till_short_desc 
                = 
                hdr.till_short_desc 
                   AND 
                dtl.txhd_txn_nr = 
                hdr.txhd_txn_nr 
                  JOIN txn_header_wag 
                   txhw 
                  ON 
                hdr.orgu_code_cmpy = 
                txhw.orgu_code_cmpy 
                AND 
                hdr.orgu_code = 
                txhw.orgu_code 
                   AND 
                hdr.till_short_desc 
                = 
     txhw.till_short_desc 
     AND hdr.txhd_txn_nr = 
     txhw.txhd_txn_nr 
     WHERE hdr.txhd_txn_type = 10 
     AND dtl.txde_detail_type IN ( 
     '1', '2', '3', '201', 
     '202', '203', '204', '205', 
     '206', '207', '208', '210', 
     '211') 
     AND txhw.txhw_processed_date = 
     '20111212' 
     AND hdr.txhd_state = 0 
     AND hdr.txhd_training_mode = 0 
     AND hdr.txhd_voided = 0 
     AND dtl.txde_item_void = 0 
     GROUP BY dtl.txde_sku_code) txn 
     ON prd.prod_sku = txn.sku_code 
     WHERE pstl.pstr_id = 3 
     AND pstr.pstr_is_live = 1 
     AND pstl.prgp_parent_id = 0 
     AND line.prgp_code IN ('30', '50', '60') 
     GROUP BY pstl.prgp_id, 
     line.prgp_code, 
     line.prgp_desc) t 
     GROUP BY t.line_num, 
     t.line_code, 
     t.line_desc 
     ORDER BY t.line_code) paid_out 
     ON main.line_code = paid_out.line_code) final_lines 
GROUP BY line_number, 
      line_desc

來源

2012-11-12 user1800852

，而不是試圖解析查詢瞭解什麼它確實（並因此告訴你是否有更簡單的方法），也許你可以向我們描述你的模式以及這個查詢的目的是什麼去完成？ – eggyal

這是一個可怕的巨大查詢。通常這是一個跡象，你有一個DBA不喜歡使用外部腳本來完成繁重的工作。 – tadman

@tadman外部腳本如何幫助，請指教。 – user1800852

您可以將其拆分爲您爲其創建視圖的邏輯組件。

例如：

LEFT JOIN 
    (SELECT dtl.txde_sku_code sku_code , COALESCE(SUM(hdr.txhd_value_nett), 0) txn_sales FROM txn_detail dtl 
    JOIN txn_header hdr ON dtl.orgu_code_cmpy  = hdr.orgu_code_cmpy AND dtl.orgu_code = hdr.orgu_code AND 
     dtl.till_short_desc       = hdr.till_short_desc AND dtl.txhd_txn_nr = hdr.txhd_txn_nr 
    JOIN txn_header_wag txhw ON hdr.orgu_code_cmpy = txhw.orgu_code_cmpy AND hdr.orgu_code = txhw.orgu_code AND 
     hdr.till_short_desc       = txhw.till_short_desc AND hdr.txhd_txn_nr = txhw.txhd_txn_nr 
    WHERE hdr.txhd_txn_type      = 10 
    AND dtl.txde_detail_type      IN ('1', '2', '3', '201', '202', '203', '204', '205', '206', 
     '207', '208', '210', '211') 
    AND txhw.txhw_processed_date = '20111212' 
    AND hdr.txhd_state   = 0 
    AND hdr.txhd_training_mode = 0 
    AND hdr.txhd_voided   = 0 
    AND dtl.txde_item_void  = 0 
    GROUP BY dtl.txde_sku_code 
    ) txn ON prd.prod_sku = txn.sku_code

可以被替代：

CREATE OR REPLACE VIEW sum_sales_by_date_sku_code 
AS 
SELECT txhw.txhw_processed_date processed_date,dtl.txde_sku_code sku_code , COALESCE(SUM(hdr.txhd_value_nett), 0) txn_sales FROM txn_detail dtl 
    JOIN txn_header hdr ON dtl.orgu_code_cmpy  = hdr.orgu_code_cmpy AND dtl.orgu_code = hdr.orgu_code AND 
     dtl.till_short_desc       = hdr.till_short_desc AND dtl.txhd_txn_nr = hdr.txhd_txn_nr 
    JOIN txn_header_wag txhw ON hdr.orgu_code_cmpy = txhw.orgu_code_cmpy AND hdr.orgu_code = txhw.orgu_code AND 
     hdr.till_short_desc       = txhw.till_short_desc AND hdr.txhd_txn_nr = txhw.txhd_txn_nr 
    WHERE hdr.txhd_txn_type      = 10 
    AND dtl.txde_detail_type      IN ('1', '2', '3', '201', '202', '203', '204', '205', '206', 
     '207', '208', '210', '211') 
AND hdr.txhd_state   = 0 
AND hdr.txhd_training_mode = 0 
AND hdr.txhd_voided   = 0 
AND dtl.txde_item_void  = 0 
GROUP BY dtl.txde_sku_code;

和查詢部分將變爲：

LEFT JOIN sum_sales_by_sku_code tnx ON prd.prod_sku = txn.sku_code 
WHERE tnx.processed_date = '20111212'

來源

2012-11-12 19:50:20

可以請你發佈更新的查詢，這將使理解更清晰。 – user1800852

關於重新構建SQL查詢

回答

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