编写双重联接以获取产品的子类别

时间：2019-01-03 20:54:19

标签： php mysql database jointable

进行双重联接以整理子类别

我正在编写一个联接以从另一个表中获取子类别。但是我的问题是子类别没有唯一的ID。子类别由xncatcode和catid组成。它们都在sub_cat表中。当您查看producten表时，会看到xngroupcode（类别）和xncatdesc（子类别）。

我现在面临的问题是我找回了正确的productgroup。但是错误的sub_cat。看到我分别加入了他们（我认为）

enter image description here 

SELECT DISTINCT
    * 
FROM 
    froets.producten
    left JOIN  froets.productcategorieën as PGROUP 
        on froets.PGROUP.productcategorienummer = froets.producten.xngroupcode 
    left JOIN  froets.sub_cat as PCAT
    on froets.producten.xncatncode = froets.PCAT.subcatid 
    left JOIN  froets.sub_cat as SCAT 
        on froets.SCAT.catid = froets.PGROUP.productcategorienummer 
WHERE 
    froets.producten.itemdesc LIKE '%flessen%'
    or froets.producten.brand like '%flessen%'

Extra data：）

在producten表中，所有产品都包含xncatcode和xngroupcode（它们都在sub_cat中）。所以有可能加入他们there。

# id, model, itemcode, itemdesc, extdesc, itemkeywords, size, sizegrid, gender, weightgr, lengthcm, heightcm, widthcm, diametercm, sizecombined, qtypercarton, decopackagingindiv, decopackagingindivtype, decopackaging, grossweightkg, nettweightkg, exportlcm, exportwcm, exporthcm, countryoforigin, hscode, impallmethods, impmethoddefault, impallpositions, imppositiondefault, imppositionsimpledefault, impwidthdefaultmm, impheightdefaultmm, impdiameterdefaultmm, impsizedefaultmm, maxcoloursdefault, brand, xngroupcode, xngroupdesc, xncatncode, xncatdesc, colordesc, simplecolor, pmscolorreference, basiccolor, peninkcolor, material, batterytype, features, bestseller, eancode, thematicitem, compliances, imagemain, imagedecoy1, imagedecoy2, imagedecoy3, imagepackage, imagefront, imageback, imageextra1, imageextra2, imageextra3, imagedetail1, imagedetail2, imagedetail3, imageprintlinesdefault, marksegment, maincat, eoycat, launchdate, language, hexcolor, imagegroup, imagemood1, imagemood2, imagemood3, imagemodel, videourl1, videourl2, newitem, id, productcategorienaam, productcategorienummer, productcategoriegroep, GroepAfbeelding, id, naam, subcatid, catid, id, naam, subcatid, catid
'44870', '104231', '10423100', 'zaklamp flessenopener', 'Omega zaklamp. Aluminium. ', 'Lamp, lampen, zaklamp, zaklampen, lantaarn, lantaarns, zaklantaarn, zaklantaarns, veiligheidslamp, veiligheidslampen,', '', '', 'None', '48', '', '10', '', '2,5', '10 x Ø 2,5 cm', '200', 'No', '', '10 / Joined bubble bag', '12', '11,4', '32', '34', '24', 'China (volksrepubliek)', '8513100000000000000000', 'Tampondruk, Lasergraveren', 'Tampondruk', 'romp', 'Lamp left, button top,On colored part', 'romp', '35', '10', '', '35 x 10 mm', '4', 'Bullet', '12', 'Tools & Torches', '1', 'Zaklampen', 'Gun metal', 'Midden grijs', '', 'Grijs', '', 'Aluminium.', '', '', '', '8713159202448', 'GUNMETAL', 'Batterijrichtlijn, WEEE, RoHS , Getest op cadmium ', '10423100.jpg', '10423100_PP_Y1.jpg', '', '', '', '10423100_F1.jpg', '', '', '10423100_E2.jpg', '', '', '', '', '10423100_1_1297_1927.jpg', 'Bullet', 'N', 'N', 'JAN16', 'NL', '6F6E71', '', '', '', '', '', '', '', 'false', '20', 'Tools & Torches', '12', NULL, '', '1', 'Sweat Shirts', '1', '21', '20', 'Auto accessoires', '3', '12'
'44870', '104231', '10423100', 'zaklamp flessenopener', 'Omega zaklamp Aluminium. ', 'Lamp, lampen, zaklamp, zaklampen, lantaarn, lantaarns, zaklantaarn, zaklantaarns, veiligheidslamp, veiligheidslampen,', '', '', 'None', '48', '', '10', '', '2,5', '10 x Ø 2,5 cm', '200', 'No', '', '10 / Joined bubble bag', '12', '11,4', '32', '34', '24', 'China (volksrepubliek)', '8513100000000000000000', 'Tampondruk, Lasergraveren', 'Tampondruk', 'romp', 'Lamp left, button top,On colored part', 'romp', '35', '10', '', '35 x 10 mm', '4', 'Bullet', '12', 'Tools & Torches', '1', 'Zaklampen', 'Gun metal', 'Midden grijs', '', 'Grijs', '', 'Aluminium.', '', '', '', '8713159202448', 'GUNMETAL', 'Batterijrichtlijn, WEEE, RoHS , Getest op cadmium ', '10423100.jpg', '10423100_PP_Y1.jpg', '', '', '', '10423100_F1.jpg', '', '', '10423100_E2.jpg', '', '', '', '', '10423100_1_1297_1927.jpg', 'Bullet', 'N', 'N', 'JAN16', 'NL', '6F6E71', '', '', '', '', '', '', '', 'false', '20', 'Tools & Torches', '12', NULL, '', '1', 'Sweat Shirts', '1', '21', '33', 'Gereedschapssetjes', '2', '12'
'44870', '104231', '10423100', 'zaklamp flessenopener', 'Omega zaklamp  Aluminium. ', 'Lamp, lampen, zaklamp, zaklampen, lantaarn, lantaarns, zaklantaarn, zaklantaarns, veiligheidslamp, veiligheidslampen,', '', '', 'None', '48', '', '10', '', '2,5', '10 x Ø 2,5 cm', '200', 'No', '', '10 / Joined bubble bag', '12', '11,4', '32', '34', '24', 'China (volksrepubliek)', '8513100000000000000000', 'Tampondruk, Lasergraveren', 'Tampondruk', 'romp', 'Lamp left, button top,On colored part', 'romp', '35', '10', '', '35 x 10 mm', '4', 'Bullet', '12', 'Tools & Torches', '1', 'Zaklampen', 'Gun metal', 'Midden grijs', '', 'Grijs', '', 'Aluminium.', '', '', '', '8713159202448', 'GUNMETAL', 'Batterijrichtlijn, WEEE, RoHS , Getest op cadmium ', '10423100.jpg', '10423100_PP_Y1.jpg', '', '', '', '10423100_F1.jpg', '', '', '10423100_E2.jpg', '', '', '', '', '10423100_1_1297_1927.jpg', 'Bullet', 'N', 'N', 'JAN16', 'NL', '6F6E71', '', '', '', '', '', '', '', 'false', '20', 'Tools & Torches', '12', NULL, '', '1', 'Sweat Shirts', '1', '21', '47', 'Zakmes', '4', '12'
'44870', '104231', '10423100', 'zaklamp flessenopener', 'Omega zaklamp Aluminium. ', 'Lamp, lampen, zaklamp, zaklampen, lantaarn, lantaarns, zaklantaarn, zaklantaarns, veiligheidslamp, veiligheidslampen,', '', '', 'None', '48', '', '10', '', '2,5', '10 x Ø 2,5 cm', '200', 'No', '', '10 / Joined bubble bag', '12', '11,4', '32', '34', '24', 'China (volksrepubliek)', '8513100000000000000000', 'Tampondruk, Lasergraveren', 'Tampondruk', 'romp', 'Lamp left, button top,On colored part', 'romp', '35', '10', '', '35 x 10 mm', '4', 'Bullet', '12', 'Tools & Torches', '1', 'Zaklampen', 'Gun metal', 'Midden grijs', '', 'Grijs', '', 'Aluminium.', '', '', '', '8713159202448', 'GUNMETAL', 'Batterijrichtlijn, WEEE, RoHS , Getest op cadmium ', '10423100.jpg', '10423100_PP_Y1.jpg', '', '', '', '10423100_F1.jpg', '', '', '10423100_E2.jpg', '', '', '', '', '10423100_1_1297_1927.jpg', 'Bullet', 'N', 'N', 'JAN16', 'NL', '6F6E71', '', '', '', '', '', '', '', 'false', '20', 'Tools & Torches', '12', NULL, '', '1', 'Sweat Shirts', '1', '21', '48', 'Zaklampen', '1', '12'
'44870', '104231', '10423100', 'zaklamp flessenopener', 'Omega zaklamp Aluminium. ', 'Lamp, lampen, zaklamp, zaklampen, lantaarn, lantaarns, zaklantaarn, zaklantaarns, veiligheidslamp, veiligheidslampen,', '', '', 'None', '48', '', '10', '', '2,5', '10 x Ø 2,5 cm', '200', 'No', '', '10 / Joined bubble bag', '12', '11,4', '32', '34', '24', 'China (volksrepubliek)', '8513100000000000000000', 'Tampondruk, Lasergraveren', 'Tampondruk', 'romp', 'Lamp left, button top,On colored part', 'romp', '35', '10', '', '35 x 10 mm', '4', 'Bullet', '12', 'Tools & Torches', '1', 'Zaklampen', 'Gun metal', 'Midden grijs', '', 'Grijs', '', 'Aluminium.', '', '', '', '8713159202448', 'GUNMETAL', 'Batterijrichtlijn, WEEE, RoHS , Getest op cadmium ', '10423100.jpg', '10423100_PP_Y1.jpg', '', '', '', '10423100_F1.jpg', '', '', '10423100_E2.jpg', '', '', '', '', '10423100_1_1297_1927.jpg', 'Bullet', 'N', 'N', 'JAN16', 'NL', '6F6E71', '', '', '', '', '', '', '', 'false', '20', 'Tools & Torches', '12', NULL, '', '1', 'Sweat Shirts', '1', '21', '49', 'Meetlinten', '8', '12'
'44870', '104231', '10423100', 'zaklamp flessenopener', 'Omega zaklamp  Aluminium. ', 'Lamp, lampen, zaklamp, zaklampen, lantaarn, lantaarns, zaklantaarn, zaklantaarns, veiligheidslamp, veiligheidslampen,', '', '', 'None', '48', '', '10', '', '2,5', '10 x Ø 2,5 cm', '200', 'No', '', '10 / Joined bubble bag', '12', '11,4', '32', '34', '24', 'China (volksrepubliek)', '8513100000000000000000', 'Tampondruk, Lasergraveren', 'Tampondruk', 'romp', 'Lamp left, button top,On colored part', 'romp', '35', '10', '', '35 x 10 mm', '4', 'Bullet', '12', 'Tools & Torches', '1', 'Zaklampen', 'Gun metal', 'Midden grijs', '', 'Grijs', '', 'Aluminium.', '', '', '', '8713159202448', 'GUNMETAL', 'Batterijrichtlijn, WEEE, RoHS , Getest op cadmium ', '10423100.jpg', '10423100_PP_Y1.jpg', '', '', '', '10423100_F1.jpg', '', '', '10423100_E2.jpg', '', '', '', '', '10423100_1_1297_1927.jpg', 'Bullet', 'N', 'N', 'JAN16', 'NL', '6F6E71', '', '', '', '', '', '', '', 'false', '20', 'Tools & Torches', '12', NULL, '', '3', 'Outdoor Fleece', '1', '23', '20', 'Auto accessoires', '3', '12'

如何获得正确的子类别：）？

1 个答案:

答案 0 :(得分：1)

如果我正确地跟随了您，则您似乎在子类别上缺少JOIN条件。

此：

LEFT JOIN  froets.sub_cat as PCAT 
    ON froets.producten.xncatncode = froets.PCAT.subcatid

应写为：

LEFT JOIN  froets.sub_cat as PCAT 
    ON froets.producten.xncatncode = froets.PCAT.subcatid 
    AND froets.producten.xngroupcode = froets.PCAT.catid
相关问题
最新问题