SQL Join - 给我多个值

问题描述

我正在尝试获取 LINE_NO 的唯一值。我试图了解代码中的问题。

SELECT SHIPMENT_TAB.PLANNED_SHIP_DATE,SHIPMENT_TAB.SHIP_VIA_CODE,SHIPMENT_TAB.RECEIVER_ADDR_ID,SHIPMENT_TAB.RECEIVER_ADDRESS_NAME,SHIPMENT_TAB.SHIPMENT_ID,SHIPMENT_TAB.RECEIVER_ID,SHIPMENT_TAB.RECEIVER_COUNTRY,SHIPMENT_TAB.RECEIVER_ADDRESS1,SHIPMENT_TAB.RECEIVER_ADDRESS2,SHIPMENT_TAB.RECEIVER_CITY,SHIPMENT_TAB.RECEIVER_STATE,SHIPMENT_TAB.RECEIVER_ZIP_CODE,SHIPMENT_LINE_TAB.SOURCE_REF1,SHIPMENT_LINE_TAB.SOURCE_PART_NO,SHIPMENT_LINE_TAB.CONNECTED_SOURCE_QTY,SHIPMENT_LINE_TAB.SOURCE_UNIT_MEAS,CUSTOMER_ORDER_TAB.CUSTOMER_PO_NO,CUSTOMER_ORDER_TAB.AUTHORIZE_CODE,CUSTOMER_ORDER_LINE_TAB.ORDER_NO,CUSTOMER_ORDER_LINE_TAB.LINE_NO,TI_PART_EXT_CLV.CF$_PATTERN_SHADE,TI_PART_EXT_CLV.CF$_PART_NO,TI_PART_EXT_CLV.CF$_STYLE_NO,TI_PART_EXT_CLV.CF$_FINISHED_WIDTH,part_catalog_tab.description
from SHIPMENT_TAB join SHIPMENT_LINE_TAB on SHIPMENT_TAB.SHIPMENT_ID = SHIPMENT_LINE_TAB.SHIPMENT_ID 
JOIN CUSTOMER_ORDER_TAB on SHIPMENT_LINE_TAB.SOURCE_REF1 = CUSTOMER_ORDER_TAB.ORDER_NO
JOIN CUSTOMER_ORDER_LINE_TAB on CUSTOMER_ORDER_LINE_TAB.ORDER_NO = CUSTOMER_ORDER_TAB.ORDER_NO
JOIN TI_PART_EXT_CLV on TI_PART_EXT_CLV.CF$_PART_NO = CUSTOMER_ORDER_LINE_TAB.PART_NO
JOIN PART_CATALOG_TAB on PART_CATALOG_TAB.PART_NO = TI_PART_EXT_CLV.CF$_PART_NO
WHERE SHIPMENT_TAB.SHIPMENT_ID = 42;

这段代码应该给我 3 个值的输出。基于 SHIPMENT_LINE TAB.SHIPMENT_LINE_NO，即 1、4、2。

但是我得到了 1,1,2,4,4。 得到 9 表明它没有给我确切的 3 行作为输出。

解决方法

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