Question

我对使用AND的SQL查询感到困惑。

查询如下：

SELECT  count(cdr.id) as callTotal,
    sum(cdr.callDurationSeconds) as timeTotal,
    users.firstname,
    users.surname, 
    MAX(cdr.callDuration) as maxCallDuration,
    AVG(cdr.answeredTime) as avgAnswerTime,
    AVG(cdr.callDurationSeconds) as avgTimeTotal,
    cdr.userId, 
    COUNT(IF(cdr.callDurationSeconds > '0', 1, NULL)) AS answeredCalls
                 FROM cdr 
                 LEFT JOIN users ON cdr.userId = users.id
                 WHERE cdr.company = 'C47B0BCCDCE92F'
                 AND cdr.dateCreated LIKE '2012-11-02%'  
                 AND  cdr.userId = 'U4BC3128209B01'  
   OR  cdr.userId = 'U4A9FCCD73C6BB'  
   GROUP BY userId  ORDER BY users.surname ASC  ;

我想查询第二行到最后一行的日期，但是我希望检索任何已发布的cdr.userIds的项目。但是在这种情况下似乎无视日期。我需要将日期设置为非可选项，并在所选日期使用选择ID检索任何数据。

Answer 1

如果您不想在SQL中使用OR / AND运算符优先级（这是一个相当糟糕的主意），只需添加括号。

AND  (cdr.userId = 'U4BC3128209B01'  OR  cdr.userId = 'U4A9FCCD73C6BB')

或如Martin Smith所指出，在您的情况下，请使用IN

AND cdr.userId IN  ('U4BC3128209B01','U4A9FCCD73C6BB')

Answer 2

您可以像其他提到的那样用括号括起OR或像这样使用IN

SELECT  count(cdr.id) as callTotal,
                         sum(cdr.callDurationSeconds) as timeTotal,
                         users.firstname,
                         users.surname, 
                         MAX(cdr.callDuration) as maxCallDuration,
                         AVG(cdr.answeredTime) as avgAnswerTime,
                         AVG(cdr.callDurationSeconds) as avgTimeTotal,
                         cdr.userId, 
                         COUNT(IF(cdr.callDurationSeconds > '0', 1, NULL)) AS answeredCalls
                 FROM cdr 
                 LEFT JOIN users ON cdr.userId = users.id
                 WHERE cdr.company = 'C47B0BCCDCE92F'
                 AND cdr.dateCreated LIKE '2012-11-02%'  
                 AND  cdr.userId IN ('U4BC3128209B01','U4A9FCCD73C6BB')  GROUP BY userId  ORDER BY users.surname ASC  ;

这样就没有OR，所以没有混淆

Answer 3

如果我理解正确，您想要选择具有该日期且具有特定ID的项目？

SELECT  count(cdr.id) as callTotal,
                         sum(cdr.callDurationSeconds) as timeTotal,
                         users.firstname,
                         users.surname, 
                         MAX(cdr.callDuration) as maxCallDuration,
                         AVG(cdr.answeredTime) as avgAnswerTime,
                         AVG(cdr.callDurationSeconds) as avgTimeTotal,
                         cdr.userId, 
                         COUNT(IF(cdr.callDurationSeconds > '0', 1, NULL)) AS answeredCalls
                 FROM cdr 
                 LEFT JOIN users ON cdr.userId = users.id
                 WHERE cdr.company = 'C47B0BCCDCE92F'
                 AND cdr.dateCreated LIKE '2012-11-02%'  
                     AND  cdr.userId IN('U4BC3128209B01','U4A9FCCD73C6BB')
                 GROUP BY userId  ORDER BY users.surname ASC  ;

Answer 4

在SQL中有一个更高的顺序然后OR，所以默认情况下你的地方解析为

             WHERE (cdr.company = 'C47B0BCCDCE92F'
             AND cdr.dateCreated LIKE '2012-11-02%'  
             AND  cdr.userId = 'U4BC3128209B01')  OR  cdr.userId = 'U4A9FCCD73C6BB'

你想要的地方

             WHERE cdr.company = 'C47B0BCCDCE92F'
             AND cdr.dateCreated LIKE '2012-11-02%'  
             AND  (cdr.userId = 'U4BC3128209B01'  OR  cdr.userId = 'U4A9FCCD73C6BB')

使用括号，它会清除。

与ANDs的SQL混淆

4 个答案: