[英]SQL Table Join, Query Issue
我正在使用此查询的联接表,它的工作,但仅返回1值,我想要颜色明智的数据,而不是所有数据。 这是我的查询及其提琴
SELECT *,
(SELECT pname
FROM tbl_product
WHERE id = tbl_productcolor.pid
) as productname,
(SELECT image
FROM tbl_product
WHERE id = tbl_productcolor.pid
) as image
FROM tbl_productcolor
WHERE id = 1
ORDER BY id ASC;
这是我的两张桌子
tbl_product
id category pcode pname image
-----------------------------------------------------
1 cat1 567 product1 img1.jpg
2 cat2 544 product2 img2.jpg
3 cat3 5665 product3 img3.jpg
4 cat1 5665 t1 img4.jpg
5 cat1 567 t5 img5.jpg
6 cat3 75 t8 img6.jpg
7 cat4 12 name img7.jpg
tbl_productcolor
id pid color
-----------------------------
1 1 Black (79)
2 1 Grey (205)
3 1 Green (69)
4 1 Blue (89)
5 1 Purple (14)
6 1 Yellow (31)
7 1 Brown (124)
8 1 Beige (95)
9 1 Cream (164)
10 1 White (09)
11 2 Multi-coloured (113)
12 2 Black (79)
13 3 Pattern (84)
14 3 Metallic (48)
15 3 Black (79)
16 3 Orange (29)
17 3 Beige (95)
18 4 Green (69)
19 4 Red (33)
20 4 Yellow (31)
21 4 Brown (124)
22 4 Beige (95)
23 4 White (09)
24 5 Black (79)
25 5 Green (69)
26 5 Purple (14)
27 5 Red (33)
28 6 Metallic (48)
29 6 Black (79)
30 6 Grey (205)
31 6 Green (69)
32 6 Purple (14)
33 6 Pink (20)
34 6 Red (33)
35 7 Pattern (84)
36 7 Multi-coloured (113)
37 7 Metallic (48)
38 7 Black (79)
39 7 Grey (205)
40 7 Green (69)
41 7 Blue (89)
42 7 Purple (14)
43 7 Pink (20)
44 7 Red (33)
45 7 Orange (29)
46 7 Yellow (31)
47 7 Brown (124)
48 7 Beige (95)
49 7 Cream (164)
50 7 White (09)
如果我做对了,则需要标准化tbl_productcolor
表,以使您的生活更轻松一些。
您应该将表格一分为二:
tbl_productcolor
id pid color_id
-----------------------------
1 1 1
29 6 1
2 1 2
30 6 2
和
tbl_colors
id name
----------------------
1 Black (79)
2 Grey (205)
对于您当前的结构,我想您需要一个查询:
select
C1.ID,
C1.PID,
c1.color,
p.pname,
p.image
FROM tbl_productcolor C1
JOIN tbl_productcolor C2 ON C1.Color=C2.Color AND C2.ID=1
JOIN tbl_product p ON C1.PID=p.ID
order by p.id asc ;
您到底想要什么(输出)? 如果删除(其中id = 1),则得到所有结果;
SELECT prdc.id,
prdc.pid,
prdc.color,
pr.pname,
pr.image
FROM tbl_productcolor prdc
INNER JOIN tbl_productcolor prd
ON prdc.color = prd.color
AND prd.id = 2
INNER JOIN tbl_product pr
ON prdc.pid = pr.id;
您可以使用此查询,它应该可以工作。
select *
from tbl_product
where id in (select pid
from tbl_productcolor
where color="Black (79)")
您可以使用以下
SELECT P.Id,
PC.Id AS ColorId,
PC.color
FROM tbl_product P
INNER JOIN tbl_productcolor PC
ON P.Id=PC.PId
WHERE PC.Color='Black (79)'
您还可以使用子表ID或颜色代码名称。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.