我在sql中有3个表,看起来像这样:(需要sql语法)
1
.xy8vx_users
-username
-email
-....
2
.xy8vx_rsform_submissions
-SubmissionId
-Username
-...
3
.xy8vx_rsform_submissions_values
-SubmissionId
-FieldName
-FieldValue
-...
我想得到:
xy8vx_users.username, and xy8vx_users.email
,满足条件
submission_values.FieldName = 'data2' AND submission_values.FieldValue = '10.03.2012'
我花了2个小时,没有人可以帮助我?
我试过这个:(但没有工作)
SELECT sub.Username
FROM `xy8vx_rsform_submission_values` AS value
JOIN `xy8vx_rsform_submissions` AS sub ON value.SubmissionId = sub.SubmissionId
JOIN xy8vx_users ` AS users ON sub.Username = users.email WHERE value.FieldName = 'data2' AND value.FieldValue = '10.03.2012'`
答案 0 :(得分:1)
select xy8vx_users.username, xy8vx_users,email
from
submission_values
inner join
submissions on
submission_values.SubmissionId = submissions.SubmissionId
inner join
xy8vx_users on
submissions.Username = xy8vx_users.username
where
submission_values.FieldName = 'data2'
and
submission_values.FieldValue = '10.03.2012'