我在这里有这个问题:
SELECT formam.*, SMS_MONTIME1.IDTICKET, SMS_MONTIME1.MBYLLUR,SMS_MONTIME1.time_added
FROM formam
LEFT JOIN SMS_MONTIME1 ON formam.ID = SMS_MONTIME1.IDTICKET WHERE SMS_MONTIME1.IDTICKET =''
or SMS_MONTIME1.IDTICKET is null
AND dyqani_pergjegjes=$dyqanip
ORDER BY formam.data_fillim DESC
问题是,它工作正常,但当我添加条件AND dyqani_pergjegjes=$dyqanip
它不再有效时,我没有得到任何错误,但我只是没有得到所需的结果。
有人请帮忙
答案 0 :(得分:1)
这将解决问题:
SELECT formam.*, SMS_MONTIME1.IDTICKET, SMS_MONTIME1.MBYLLUR,SMS_MONTIME1.time_added
FROM formam
LEFT JOIN SMS_MONTIME1 ON formam.ID = SMS_MONTIME1.IDTICKET WHERE SMS_MONTIME1.IDTICKET =''
OR (SMS_MONTIME1.IDTICKET is null
AND dyqani_pergjegjes=$dyqanip)
ORDER BY formam.data_fillim DESC
我改变的是我把括号括在
SMS_MONTIME1.IDTICKET为空并且dyqani_pergjegjes = $ dyqanip
确保OR和AND的正确优先级。