我有一个tableBusiness。有列 ID 和 BuildingID。
BuildingID 也指向 tableBusiness。建筑物就是企业。
现在我想创建每行包含的行
ID, BusinessTitle, BuildingTitle 定义为 ID 与 BuildingID 相同的企业的 BusinessTitle >
我该怎么做？
如果不是 self 引用，我知道我能做到
$query="Select *, Country FROM `tablebusiness` As TB, `tablecity` As TC
WHERE (".$IDWhereFinal.") AND TB.City=TC.City";
这里，Country实际上是表tablecity中的一列。
但现在我想要 BuildingTitle 它不是任何地方的列。应使用 ID 与 BuildingID 相同的业务中的字段 Title。
我怎样才能把它拉出来？
我用过
SELECT * , Country, (
SELECT Title
FROM `tablebusiness` AS TBuild
WHERE TBuild.ID = TB.Building
) AS Coba
FROM `tablebusiness` AS TB, `tablecity` AS TC
WHERE TB.City = TC.City
看起来工作正常，但有点奇怪
尝试另一个答案。
Select *, Country, TB.Title as BuildingTitle FROM `tablebusiness` As TB, `tablecity` As TC
WHERE TB.ID<30 AND TB.City=TC.City
工作正常，只是 BuildingTitle 列只是企业的名称。我希望这是该企业所在大楼的名称。
那我就做
SELECT * , Country, Building.Title AS BuildingTitle
FROM `tablebusiness` AS TB, `tablebusiness` AS Building, `tablecity` AS TC
WHERE TB.ID <30
AND TB.City = TC.City
AND TB.building = Building.id
LIMIT 0 , 30
我只找到位于建筑物内的企业
ID Email InBuildingAddress Price Street Title Website Zip Rating Star Rating Weight Latitude Longitude Building City OpeningHour TimeStamp ID Email InBuildingAddress Price Street Title Website Zip Rating Star Rating Weight Latitude Longitude Building City OpeningHour TimeStamp City Country Country BuildingTitle
6 NULL Unit No. 11 Lt. 6 Food Court NULL Jl. Arteri S. Parman Citra NULL NULL 0 0 -6.168758 106.787377 200004 Jakarta Everyday, 10:00 - 22:00 2011-11-06 22:30:37 200004 jakarta@swiss-belhotel.com Lt. P-1 Unit 1 & 52-53 NULL Jl. Letjen S. Parman No. 31 Mall Ciputra NULL 11470 4.33333333333333 3 -6.16852955233882 106.787015629421 0 Jakarta Barat NULL 2011-11-06 22:29:28 Jakarta Indonesia Indonesia Mall Ciputra
7 NULL Lt. 2 No 40 NULL Jl. K.H. Noer Ali Eaton Bakery and Restaurant NULL NULL 0 0 -6.248135 106.991926 200005 Jakarta Monday - Sunday 10:00 - 22:00 2011-11-06 22:30:37 200005 NULL NULL NULL Jl. K.H. Noer Ali Metropolitan Mall Bekasi NULL NULL 0 0 -6.248135 106.991926 0 Jakarta NULL 2011-11-06 22:29:28 Jakarta Indonesia Indonesia Metropolitan Mall Bekasi
8 NULL Lt. GF NULL Jl. Pluit Indah Raya Deli Manjoo NULL NULL 0 0 -6.116341 106.789556 200006 Jakarta Mon - Sun 10:00 - 22:00 2011-11-06 22:30:37 200006 NULL NULL NULL Jl. Pluit Indah Raya Pluit Village Mall NULL 14450 0 1 -6.11636729665532 106.78957198066 0 Jakarta Utara NULL 2011-11-06 22:29:28 Jakarta Indonesia Indonesia Pluit Village Mall
9 NULL #18 NULL Jl. Boulevard Palem Raya No. 38 Restaurant India NULL NULL 0 0 -6.22868 106.60923 200007 Jakarta Everyday, 10:00 - 00:00 2011-11-06 22:30:37 200007 NULL NULL NULL Jl. Boulevard Palem Raya No. 38 lippo Karawaci 120... Benton Junction NULL 15811 0 0 -6.22827750567979 106.608705787526 0 Tangerang NULL 2011-11-06 22:29:28 Jakarta Indonesia Indonesia Benton Junction
14 NULL Ground Floor NULL Jl. Raya Boulevard Kelapa Gading Blok M Mochi-Mochi NULL NULL 5 1 -6.157515125 106.9084265 200009 Jakarta Mon - Sun 10:00 - 22:00 2011-11-06 22:30:37 200009 communicationnetwork@sogo.co.id Unit 159 NULL Jl. Bulevar Kelapa Gading Blok M Kelapa Gading Per... Mall Kelapa Gading 2 NULL 14240 1.75 4 -6.15783092569102 106.907815359612 0 Jakarta Utara NULL 2011-11-06 22:29:28 Jakarta Indonesia Indonesia Mall Kelapa Gading 2
16 NULL NULL NULL Jl. HR. Rasuna Said Lt. Dasar Rumah Makan Aroma Sulawesi NULL NULL 0 0 -6.2210955 106.8329755 200010 Jakarta Everyday, 10:00 - 22:00 2011-11-06 22:30:37 200010 NULL NULL NULL Jl. HR. Rasuna Said Lt. Dasar Mall Pasar Festival NULL 12960 1.5 2 -6.22111994514218 106.83291640369 0 Jakarta Selatan NULL 2011-11-06 22:29:28 Jakarta Indonesia Indonesia Mall Pasar Festival
17 NULL Lt. 6 Food Court 119 A NULL Jl. Asia Afrika Pintu 9 Alberki Khas Sulawesi NULL NULL 0 0 -6.228376 106.798677 200011 Jakarta Everyday, 09:00 - 20:00 2011-11-06 22:30:37 200011 stc_inbox@co.id NULL NULL Jl. Asia Afrika Pintu 9 STC Senayan NULL 10270 0.5 2 -6.22839746826785 106.798676515068 0 Jakarta Pusat NULL 2011-11-06 22:29:28 Jakarta Indonesia Indonesia STC Senayan
20 NULL Blok Kt Unit 34 NULL Jl. Maleo Raya ( Bintaro Sektor 9 ) Nasi Kebuli Haji Ali NULL 12330 0 0 -6.27829125 106.72197075 200259 Jakarta Selatan Everyday, 16:00 - 00:00 2011-11-06 22:30:37 200259 NULL NULL NULL Jl. Maleo Raya ( Bintaro Sektor 9 ) Bintaro Trade Centre NULL NULL 0 0 -6.27829125 106.72197075 0 Tangerang Selatan NULL 2011-11-06 22:29:28 Jakarta Selatan Indonesia Indonesia Bintaro Trade Centre
21 NULL Food Court Floor 5, No 31 NULL Jl.Letjend Suprapto Khas Sulawesi NULL NULL 0 0 -6.169621625 106.867814 200013 Jakarta Everyday 11:00 - 18:00 2011-11-06 22:30:37 200013 NULL NULL NULL Jl. Let. Jend Suprapto Kav. 62 No. 1 Grand Cempaka Jakarta Hotel NULL 10640 0 0 -6.17011293789604 106.868159676677 0 Jakarta Pusat NULL 2011-11-06 22:29:28 Jakarta Indonesia Indonesia Grand Cempaka Jakarta Hotel
22 NULL Food Court Floor 5, No 86 NULL Jl.Letjend Suprapto Kwetiau Sapi 88 Pontianak NULL NULL 0 0 -6.169621625 106.867814 200013 Jakarta Everyday 10:00 - 20:00 2011-11-06 22:30:37 200013 NULL NULL NULL Jl. Let. Jend Suprapto Kav. 62 No. 1 Grand Cempaka Jakarta Hotel NULL 10640 0 0 -6.17011293789604 106.868159676677 0 Jakarta Pusat NULL 2011-11-06 22:29:28 Jakarta Indonesia Indonesia Grand Cempaka Jakarta Hotel
23 NULL Lt. 2 Blok A 2 #19 - 21 NULL Jl. Boulevard Artha Gading Selatan No. 1 Toreore Chicken & Joy NULL NULL 0 0 -6.14630575 106.89517725 200014 Jakarta Mon - Sun 10:00 - 22:00 2011-11-06 22:30:37 200014 NULL NULL NULL Jl. Boulevard Artha Gading Selatan No. 1 Rukan Artha Gading Niaga NULL 14250 2.33333333333333 3 -6.14615740918793 106.89470094061 0 Jakarta Utara NULL 2011-11-06 22:29:28 Jakarta Indonesia Indonesia Rukan Artha Gading Niaga
24 NULL Food Court Floor 5, No 57 NULL Jl.Letjend Suprapto Ou Kie NULL NULL 0 0 -6.169621625 106.867814 200013 Jakarta Everyday 11:00 - 20:00 2011-11-06 22:30:37 200013 NULL NULL NULL Jl. Let. Jend Suprapto Kav. 62 No. 1 Grand Cempaka Jakarta Hotel NULL 10640 0 0 -6.17011293789604 106.868159676677 0 Jakarta Pusat NULL 2011-11-06 22:29:28 Jakarta Indonesia Indonesia Grand Cempaka Jakarta Hotel
25 NULL Lt. Pasar Senggol Blok Exb Unit 03 NULL Jl. Letjen S. Parman No. 31 Bakmi Bangka NULL 11470 0 0 -6.168758 106.787377 200004 Jakarta Barat Everyday, 10:00 - 22:00 2011-11-06 22:30:37 200004 jakarta@swiss-belhotel.com Lt. P-1 Unit 1 & 52-53 NULL Jl. Letjen S. Parman No. 31 Mall Ciputra NULL 11470 4.33333333333333 3 -6.16852955233882 106.787015629421 0 Jakarta Barat NULL 2011-11-06 22:29:28 Jakarta Barat Indonesia Indonesia Mall Ciputra
27 NULL Food Court Floor 5, No 98 NULL Jl.Letjend Suprapto Seroja Baru NULL NULL 0 0 -6.169621625 106.867814 200013 Jakarta Everyday 10:00 - 19:30 2011-11-06 22:30:37 200013 NULL NULL NULL Jl. Let. Jend Suprapto Kav. 62 No. 1 Grand Cempaka Jakarta Hotel NULL 10640 0 0 -6.17011293789604 106.868159676677 0 Jakarta Pusat NULL 2011-11-06 22:29:28 Jakarta Indonesia Indonesia Grand Cempaka Jakarta Hotel
28 NULL 4th Fl Unit 57 NULL Jl. Jend. Sudirman Kav. 52 - 53 sudirman Central B... Secret Recipe NULL 12190 0 0 -6.226948 106.8133435 200015 Jakarta Selatan Mon - Sun 10:00 - 22:00 2011-11-06 22:30:37 200015 NULL Lt. Ground Unit 99 NULL Jl. Jend. Sudirman Kav. 52 - 53 sudirman Central B... Pacific Place Mall NULL 12190 4.33333333333333 3 -6.22628017797778 106.812480471955 0 Jakarta Selatan NULL 2011-11-06 22:29:28 Jakarta Selatan Indonesia Indonesia Pacific Place Mall
假设我想要所有业务，无论建筑物是否在建筑物内。如果建筑物是空的，我希望 BuildingTitle 包含 NULL。如果建筑物不为空，我希望 BuildingTitle 列包含建筑物的标题。我该怎么做？
如果企业位于建筑物内，则 BuildingTitle 列应包含建筑物的名称。如果建筑物是空的 BuildingTitle 应为 NULL
现在我该怎么办？
最佳答案
$query="Select *, Country, TB.Title as BuildingTitle FROM `tablebusiness` As TB, `tablecity` As TC
WHERE (".$IDWhereFinal.") AND TB.City=TC.City";
您应该使用 Join 连接表
关于mysql - 在自引用表中显示同一列两次，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8033703/