Pervasive PSQL GROUP BY子句

Question

我在Pervasive V11數據庫上進行了以下SQL調用。 我正在尋找工作，以便每個項目ID只獲得一行。

SELECT 
    inventory_history.item_id AS 'ItemId', 
    RTrim(inventory_items.item_name) AS 'Description', 
    If(RTrim(trx_type) = 'P',SUM(change_quantity),'') AS 'QtyChangeP', 
    If(RTrim(trx_type) = 'P',SUM(history_cost_01+history_cost_02+history_cost_03+history_cost_04+history_cost_05+history_cost_06+history_cost_07+history_cost_08+history_cost_09+history_cost_10+history_cost_11+history_cost_12),'') AS 'CostChangeP', 
    If(RTrim(trx_type) = 'S',SUM(change_quantity),'') AS 'QtyChangeS', 
    If(RTrim(trx_type) = 'S',SUM(history_cost_01+history_cost_02+history_cost_03+history_cost_04+history_cost_05+history_cost_06+history_cost_07+history_cost_08+history_cost_09+history_cost_10+history_cost_11+history_cost_12),'') AS 'CostChangeS', 
    If(RTrim(trx_type) = 'A',SUM(change_quantity),'') AS 'QtyChangeA', 
    If(RTrim(trx_type) = 'A',SUM(history_cost_01+history_cost_02+history_cost_03+history_cost_04+history_cost_05+history_cost_06+history_cost_07+history_cost_08+history_cost_09+history_cost_10+history_cost_11+history_cost_12),'') AS 'CostChangeA', 
    If(RTrim(trx_type) = 'T',SUM(change_quantity),'') AS 'QtyChangeT', 
    If(RTrim(trx_type) = 'T',SUM(history_cost_01+history_cost_02+history_cost_03+history_cost_04+history_cost_05+history_cost_06+history_cost_07+history_cost_08+history_cost_09+history_cost_10+history_cost_11+history_cost_12),'') AS 'CostChangeT', 
    If(RTrim(inventory_categories.stocked_by_factor) = 'FT',inventory_items.unit_weight,'') AS 'WtPerFt' 
FROM 
    inventory_history 
INNER JOIN 
    inventory_items ON inventory_history.item_id = inventory_items.item_id 
INNER JOIN 
    inventory_categories ON inventory_items.category_id = inventory_categories.category_id 
WHERE 
    trx_date>'20170731' 
GROUP BY 
    inventory_history.item_id, inventory_items.item_name, trx_type, stocked_by_factor, unit_weight; 

因爲它是現在，我收到來自數據庫的錯誤，如果我沒有trx_type，stocked_by_factor，或unit_weight在集團上市By子句。

刪除這些字段會導致此錯誤：

Column invalid. Must be a group by column: trx_type in SELECT LIST.

下面是完整的SQL調用的抽查結果：

ItemId      Description                           QtyChangeP                 CostChangeP                  QtyChangeS                 CostChangeS                  QtyChangeA                 CostChangeA                  QtyChangeT                 CostChangeT   WtPerFt 
========================= ================================================== ============================================================================ ============================================================================ ============================================================================ ============================================================================ ============================================================================ ============================================================================ ============================================================================ ============================================================================ ============== 
1100SM19050T2C1    1100-H19 LAMI SHIM .050" TYPE 2, CLASS 1                     58.2400                   890.00                   0.0000                   0.00                   0.0000                   0.00                   0.0000                   0.00   0.000000 
1100SM19050T2C1    1100-H19 LAMI SHIM .050" TYPE 2, CLASS 1                     0.0000                   0.00                  58.2400                   890.00                   0.0000                   0.00                   0.0000                   0.00   0.000000 
1100SM19085T2C1    1100-H19 LAMI SHIM .085" TYPE 2, CLASS 1                     0.0000                   0.00                   0.0000                   0.00                   0.0000                   0.00                   0.0000                   0.00   0.000000 
1100SM19085T2C1    1100-H19 LAMI SHIM .085" TYPE 2, CLASS 1                     19.8080                   208.00                   0.0000                   0.00                   0.0000                   0.00                   0.0000                   0.00   0.000000 
1100SM19085T2C1    1100-H19 LAMI SHIM .085" TYPE 2, CLASS 1                     0.0000                   0.00                  19.8080                   208.00                   0.0000                   0.00                   0.0000                   0.00   0.000000 

任何幫助是極大的讚賞。謝謝！！

Answer 1

沒關係...的小時後貨架我的大腦，答案就在我面前。我只需要將If（）函數轉換爲SUM（）函數。

這裏的工作電話：

SELECT 
    inventory_history.item_id AS 'ItemId', 
    RTrim(inventory_items.item_name) AS 'Description', 
    SUM(If(RTrim(trx_type) = 'P',inventory_history.change_quantity,0)) AS 'QtyChangeP', 
    SUM(If(RTrim(trx_type) = 'P',(history_cost_01+history_cost_02+history_cost_03+history_cost_04+history_cost_05+history_cost_06+history_cost_07+history_cost_08+history_cost_09+history_cost_10+history_cost_11+history_cost_12),0)) AS 'CostChangeP', 
    SUM(If(RTrim(trx_type) = 'S',inventory_history.change_quantity,0)) AS 'QtyChangeS', 
    SUM(If(RTrim(trx_type) = 'S',(history_cost_01+history_cost_02+history_cost_03+history_cost_04+history_cost_05+history_cost_06+history_cost_07+history_cost_08+history_cost_09+history_cost_10+history_cost_11+history_cost_12),0)) AS 'CostChangeS', 
    SUM(If(RTrim(trx_type) = 'A',inventory_history.change_quantity,0)) AS 'QtyChangeA', 
    SUM(If(RTrim(trx_type) = 'A',(history_cost_01+history_cost_02+history_cost_03+history_cost_04+history_cost_05+history_cost_06+history_cost_07+history_cost_08+history_cost_09+history_cost_10+history_cost_11+history_cost_12),0)) AS 'CostChangeA', 
    SUM(If(RTrim(trx_type) = 'T',inventory_history.change_quantity,0)) AS 'QtyChangeT', 
    SUM(If(RTrim(trx_type) = 'T',(history_cost_01+history_cost_02+history_cost_03+history_cost_04+history_cost_05+history_cost_06+history_cost_07+history_cost_08+history_cost_09+history_cost_10+history_cost_11+history_cost_12),0)) AS 'CostChangeT', 
    If(RTrim(inventory_categories.stocked_by_factor) = 'FT',inventory_items.unit_weight,'') AS 'WtPerFt' 
FROM 
    inventory_history 
INNER JOIN 
    inventory_items ON inventory_history.item_id = inventory_items.item_id 
INNER JOIN 
    inventory_categories ON inventory_items.category_id = inventory_categories.category_id 
WHERE 
    trx_date>'20170731' 
GROUP BY 
    inventory_history.item_id, inventory_items.item_name, stocked_by_factor, unit_weight; 

Answer 2

條件應該是參數的sum()：

sum(If(RTrim(trx_type) = 'P', change_quantity), 0) AS QtyChangeP, 

通常情況下，這將使用case這樣寫：

sum(case when RTrim(trx_type) = 'P' then change_quantity else 0 end) AS QtyChangeP,