多個OUTER JOIN

Question

我真的厭倦了訪問和它的奇怪的SQL語法，我瀏覽過谷歌和StackOverflow，我發現提示，但我無法設法讓我的大查詢工作......我只是有多個左外連接，我不能安排在括號內，讓它接受這個該死的訪問...

你能給我一個暗示我的連接有什麼問題嗎？爲什麼訪問抱怨：「JOIN SYNTAX錯誤」

真的很感謝您！

Miloud

SELECT ORDR.*, ITEM.*, ERAS.*, MAPP.New, KUMV.* 
FROM ((GEN_ORDERS AS ORDR) 
LEFT OUTER JOIN 
( 
(SELECT concat,ORDER_NUM, ConTY1 AS CT, ConValue1 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY2 AS CT, ConValue2 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY3 AS CT, ConValue3 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY4 AS CT, ConValue4 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY5 AS CT, ConValue5 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY6 AS CT, ConValue6 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY7 AS CT, ConValue7 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY8 AS CT, ConValue8 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY9 AS CT, ConValue9 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY10 AS CT, ConValue10 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY11 AS CT, ConValue11 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY12 AS CT, ConValue12 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY13 AS CT, ConValue13 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY14 AS CT, ConValue14 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY15 AS CT, ConValue15 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY16 AS CT, ConValue16 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY17 AS CT, ConValue17 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY18 AS CT, ConValue18 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY19 AS CT, ConValue19 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY20 AS CT, ConValue20 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY21 AS CT, ConValue21 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY22 AS CT, ConValue22 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY23 AS CT, ConValue23 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY24 AS CT, ConValue24 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY25 AS CT, ConValue25 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY26 AS CT, ConValue26 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY27 AS CT, ConValue27 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY28 AS CT, ConValue28 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY29 AS CT, ConValue29 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY30 AS CT, ConValue30 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY31 AS CT, ConValue31 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY32 AS CT, ConValue32 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY33 AS CT, ConValue33 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY34 AS CT, ConValue34 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY35 AS CT, ConValue35 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY36 AS CT, ConValue36 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY37 AS CT, ConValue37 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY38 AS CT, ConValue38 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY39 AS CT, ConValue39 AS CV FROM GEN_ITEMS UNION ALL 
SELECT concat,ORDER_NUM, ConTY409 AS CT, ConValue40 AS CV FROM GEN_ITEMS) AS ITEM) 
ON ORDR.ORDER_NUM = ITEM.ORDER_NUM 
) 
LEFT OUTER JOIN GEN_ERASALES AS ERAS ON ITEM.concat = ERAS.concat 
LEFT OUTER JOIN MAPPING AS MAPP ON ITEM.CT = MAPP.Old 
LEFT OUTER JOIN GEN_KUMV KUMV ON ERAS.DOCCOND = KUMV.KNUMV AND MAPP.New = KUMV.KSCHL 

Answer 1

Access沒有左外連接，剛出加入。你需要括號爲每個加入，你不能有AND：

SELECT ORDR.*, ITEM.*, ERAS.*, MAPP.New, KUMV.* 
FROM (((GEN_ORDERS AS ORDR 
LEFT JOIN 

(.... Union ....) As Item 
ON ORDR.ORDER_NUM = ITEM.ORDER_NUM) 


LEFT JOIN GEN_ERASALES AS ERAS ON ITEM.concat = ERAS.concat) 
LEFT JOIN MAPPING AS MAPP ON ITEM.CT = MAPP.Old) 
LEFT JOIN GEN_KUMV KUMV ON ERAS.DOCCOND = KUMV.KNUMV 

你可能想使用子查詢或WHERE爲AND MAPP.New = KUMV.KSCHL，根據您的要求。

編輯我應該補充說Access會接受AND，但在這種情況下會導致模糊的外連接，所以需要重新安排一些。