编写双连接以获取产品的子类别
Writing a double join to get the subcategory of the product
进行双连接以整理子类别
我正在编写连接以从另一个 table 中获取子类别。但我遇到的问题是子类别没有唯一 ID。子目录由 xncatcode 和 catid 一起组成。他们都在sub_cattable。当您查看 producten table 时，您会看到 xngroupcode (cat) 和 xncatdesc (subcat)。
我现在面临的问题是我找回了正确的productgroup。但是错了sub_cat。看到我分别加入他们（我认为）
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:)
producten table 中包含 xncatcode 和 xngroupcode 中的所有产品（它们都在 sub_cat 中）。那么有没有可能加入他们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'
如何找回正确的子类别:)？
如果我没听错，您似乎缺少子类别的 JOIN 条件。
这个：
LEFT JOIN froets.sub_cat as PCAT
ON froets.producten.xncatncode = froets.PCAT.subcatid
应该写成：
LEFT JOIN froets.sub_cat as PCAT
ON froets.producten.xncatncode = froets.PCAT.subcatid
AND froets.producten.xngroupcode = froets.PCAT.catid
进行双连接以整理子类别
我正在编写连接以从另一个 table 中获取子类别。但我遇到的问题是子类别没有唯一 ID。子目录由 xncatcode 和 catid 一起组成。他们都在sub_cattable。当您查看 producten table 时，您会看到 xngroupcode (cat) 和 xncatdesc (subcat)。
我现在面临的问题是我找回了正确的productgroup。但是错了sub_cat。看到我分别加入他们（我认为）
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:)
producten table 中包含 xncatcode 和 xngroupcode 中的所有产品（它们都在 sub_cat 中）。那么有没有可能加入他们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'
如何找回正确的子类别:)？
如果我没听错，您似乎缺少子类别的 JOIN 条件。
这个：
LEFT JOIN froets.sub_cat as PCAT
ON froets.producten.xncatncode = froets.PCAT.subcatid
应该写成：
LEFT JOIN froets.sub_cat as PCAT
ON froets.producten.xncatncode = froets.PCAT.subcatid
AND froets.producten.xngroupcode = froets.PCAT.catid