SELECT id,businessName,GROUP_CONCAT(id) FROM tbl_business LIMIT 0,1
以上查询给出了以下结果
1 Camp San Fransisco 1,4
现在,如果我应用GROUP BY并限制相同的查询,GROUP_CONCAT列不会给我与以前相同的结果 .
SELECT id,businessName,GROUP_CONCAT(id) FROM tbl_business GROUP BY id LIMIT 0,1
查询结果
1 Camp San Fransisco 1
我正在使用GROUP BY id来获取具有某些where条件的唯一记录 .
是否有任何替代方法可以使用GROUP_BY和GROUP_CONCAT或MySQL的任何其他方法,这在这里很有用 .
我想保留第一个带有id的查询结果,所以我只需要根据第一个结果id调用第二个查询,如果可能的话 . 我无法删除GROUP BY id,因为多个表的LEFT JOIN和一些SUB QUERY取决于它
以上查询仅用于解释目的,原始查询更长 .
实际查询:
SELECT bs.id,bs.businessName,bs.businessDesc,bs.latitude,bs.longitude,bs.slug,bs.contactNo,bs.location,bs.isAddedBy,bs.createdDate,cat.categoryName as category,GROUP_CONCAT(DISTINCT(bcat.categoryName) SEPARATOR ', ') as subcategory,
(SELECT COUNT(id) FROM tbl_reviews WHERE referenceId = bs.id) as totalReview,
(SELECT CEIL(AVG(rating)) FROM tbl_reviews WHERE referenceId = bs.id) as avgRating,
(SELECT imageName FROM tbl_business_images as bimg WHERE bimg.businessId = bs.id LIMIT 1) as bImage,
(
(ACOS
(
SIN(37.09024 * PI() / 180) * SIN(bs.latitude * PI() / 180) + COS(37.09024 * PI() / 180) * COS(bs.latitude * PI() / 180) * COS(
(-95.712891 - bs.longitude) * PI() / 180)
)* 180 / PI()
) * 60 * 1.1515 * 1.609344
) as distance,
(SELECT
(DATEDIFF(bs.createdDate,NOW()) * 5) +
((SELECT COUNT(id) FROM tbl_business_images WHERE businessId = bs.id) * 2) +
((SELECT count(id) FROM tbl_business_views WHERE businessId = bs.id) * 2) +
((SELECT COUNT(id) FROM tbl_reviews WHERE referenceId = bs.id) * 10))
as totalPoint
FROM tbl_business as bs
LEFT JOIN tbl_category as cat
ON bs.businessCat = cat.id
LEFT JOIN tbl_business_subcategories as bsubs
ON bs.id = bsubs.businessId
LEFT JOIN tbl_category as bcat
ON bsubs.subcategoryId = bcat.id
WHERE bs.isActive = 'y'
GROUP BY bs.slug
当前查询输出:
id businessName businessDesc latitude longitude slug contactNo location isAddedBy createdDate category subcategory totalReview avgRating bImage distance totalPoint
1 test test 45.14 -122.82 test 1234567890 USA c 2018-09-29 11:38:58 Category Subcategory1,subcategory2 1 5 image.png 2382.763331498852 -4
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