Question

下面的查询为我提供了我想要的结果。

SELECT * 
FROM   PTAddedApp 
WHERE  PTAddedApp.date BETWEEN '2014-12-01' AND '2015-01-13'

但是，下面的查询给出了0结果或者如果我放下WHERE PTAddedApp.date = 0我得到所有结果with 0000-00-00作为日期值。我有一个按钮捣碎了相当多。任何帮助将不胜感激。日期列具有日期数据类型。

SELECT PTAddedApp.id, 
       PTAddedApp.family_id, 
       PTAddedApp.tid, 
       PTAddedApp.date, 
       PTAddedApp.rate, 
       PT_Tutors.first_name, 
       PT_Tutors.last_name, 
       PT_Family_Info2.billing_name 
FROM   PTAddedApp 
       INNER JOIN PT_Tutors 
               ON PTAddedApp.tid = CONCAT(PT_Tutors.first_name, ' ', 
                                   PT_Tutors.last_name) 
       INNER JOIN PT_Family_Info2 
               ON PTAddedApp.family_id = PT_Family_Info2.id 
WHERE  PTAddedApp.date BETWEEN '2014-12-01' AND '2015-01-13' 
ORDER  BY PT_Tutors.last_name

Answer 1

如果您希望包含与PTAddedApp中的where条件匹配的所有记录以及在联接表中找到的任何其他数据，则以下操作应该可行！

SELECT PTAddedApp.id, 
       PTAddedApp.family_id, 
       PTAddedApp.tid, 
       PTAddedApp.date, 
       PTAddedApp.rate, 
       PT_Tutors.first_name, 
       PT_Tutors.last_name, 
       PT_Family_Info2.billing_name 
FROM   PTAddedApp 
       LEFT JOIN PT_Tutors 
               ON PTAddedApp.tid = CONCAT(PT_Tutors.first_name, ' ', 
                                   PT_Tutors.last_name) 
       LEFT JOIN PT_Family_Info2 
               ON PTAddedApp.family_id = PT_Family_Info2.id 
WHERE  PTAddedApp.date BETWEEN '2014-12-01' AND '2015-01-13' 
ORDER  BY PT_Tutors.last_name

MySQL - SELECT * WHERE日期工作，SELECT特定＆amp; INNER JOIN在哪里日期不起作用

1 个答案: