使用数据透视表mySQL查询特定值 [英] Query a specific value with Pivot Table mySQL
问题描述
我已经在互联网上进行了搜索,但找不到找到我问题的答案的运气很差.我希望这还没有专门发布,但是如果您能指出我可以找到答案的地方,我将不胜感激.
I have searched all over the internet and I have had no luck in finding the answer to my question. I hope this has not specifically been posted yet, but if you can point to where i can find the answer I would appreciate it.
我能够获取以下表格数据:
I was able to take the following table data below:
id lead_id form_id field_number value
1 1 1 1 Hosker
2 1 1 7 b**********@yahoo.com
3 1 1 6 Hyundai Tournament of Champions
4 1 1 3 Adam Scott
5 1 1 4 Harris English
6 1 1 5 2014-01-02 23:59:47
7 1 1 8 5b409692-e9ed-486e-8d77-7d734f1e023d
并使用以下查询字符串获取以下结果:
And get the result below using this query string:
SELECT id, lead_id, form_id,
MAX(case when field_number = 1 then value end) username,
MAX(case when field_number = 7 then value end) email,
MAX(case when field_number = 6 then value end) tournament_name,
MAX(case when field_number = 3 then value end) primary_golfer,
MAX(case when field_number = 4 then value end) backup_golfer,
MAX(case when field_number = 5 then value end) date,
MAX(case when field_number = 8 then value end) tournament_id
FROM `wp_rg_lead_detail` GROUP BY lead_id
id lead_id form_id field_number value value value value value value value
1 1 1 1 Hosker b**********@yahoo.com Hyundai Tournament of Champions Adam Scott Harris English 2014-01-02 23:59:47 5b409692-e9ed-486e-8d77-7d734f1e023d
我只希望该查询字符串仅在race_id列的值等于特定值时提取相关数据.我该怎么办?
I just want that query string to only pull the related data when the value of the tournament_id column equals a specific value. How would I do that?
推荐答案
尝试此查询.我认为您可以使用HAVING
子句.
try this query. I think you can use the HAVING
clause.
SELECT id, lead_id, form_id,
MAX(case when field_number = 1 then value end) username,
MAX(case when field_number = 7 then value end) email,
MAX(case when field_number = 6 then value end) tournament_name,
MAX(case when field_number = 3 then value end) primary_golfer,
MAX(case when field_number = 4 then value end) backup_golfer,
MAX(case when field_number = 5 then value end) date,
MAX(case when field_number = 8 then value end) tournament_id
FROM `wp_rg_lead_detail` GROUP BY lead_id
HAVING tournament_id = '5b409692-e9ed-486e-8d77-7d734f1e023d'
sqlFiddle 在sqlFiddle中,我有2个不同的tour_id和将应用HAVING
子句,以便仅返回该race_id的值,您可以尝试删除HAVING并看到它返回2行.
sqlFiddle In the sqlFiddle I have sample data for 2 different tournament_id and the HAVING
clause is applied so that only values for that tournament_id would be returned, you can try removing the HAVING and see that it returns 2 rows.
您的分组依据不是标准的,因为您还同时选择了id和form_id.我建议您删除ID或使用MIN(id)或MAX(id)和GROUP BY lead_id,form_id
Your Group By is not standard since you're selecting id and form_id as well. I suggest you drop the the id or use MIN(id) or MAX(id) and GROUP BY lead_id,form_id
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