MySQL选择查询返回无关输出

Question

SELECT updateDate, id,cSsn,cLname,cFname,cDOB,cDOD,cCity,cState,cHospital,cCurstatus,cMmrcashworker,cTelephone FROM med_patient WHERE cCurstatus!='completed' AND cMmrcashworker = '2' AND cHospital = '1234' OR cHospital1 = '1234' OR cHospital2 ='1234' AND updateDate between '1/30/2010' and '1/28/2010' order by id desc'

输出：

updateDate   cHospital   cHospital1     cHospital2

01/15/2010   1234

01/15/2010   1234

但据我所知，我的查询必须返回一个空行。

查询中的错误在哪里？

Answer 1

尝试在您的cHospital条件中添加一些括号，否则您将不会达到预期目标：

cCurstatus!='completed' AND cMmrcashworker = '2' AND
(cHospital = '1234' OR cHospital1 = '1234' OR cHospital2 ='1234') AND
updateDate between '1/30/2010' and '1/28/2010' order by id desc'

也：

... updateDate between '1/30/2010' and '1/28/2010' ...

^正在进行字符串比较而不是日期比较，请尝试更改为：

... updateDate between '2010-01-30' and '2010-01-28' ...

Answer 2

我的问题已解决。根据jspcal的指导，我将datetype更改为datetime。

现在我得到了预期的输出。