Pervasive PSQL GROUP BY子句

Question

我在Pervasive V11数据库上进行了以下SQL调用。 我正在寻找工作，以便每个项目ID只获得一行。

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; 

因为它是现在，我收到来自数据库的错误，如果我没有trx_type，stocked_by_factor，或unit_weight在集团上市By子句。

删除这些字段会导致此错误：

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

下面是完整的SQL调用的抽查结果：

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 

任何帮助是极大的赞赏。谢谢！！

Answer 1

没关系...的小时后货架我的大脑，答案就在我面前。我只需要将If（）函数转换为SUM（）函数。

这里的工作电话：

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

条件应该是参数的sum()：

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

通常情况下，这将使用case这样写：

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