mysql - 在 Telerik radrotator(legand) 中，日期绑定(bind)为 system.byte

Question

在 Telerik 中 radrotator(legand) 日期绑定(bind)为 system.byte:

Dim mssQL=" case when a.log_type='Schedule' then" & _
          " (select case when e.schedule_type='Call Log' then cast( concat(d.user_firstname,' ',d.user_lastname,' ','Scheduled a Call On',' ',(DATE_FORMAT(e.schedule_date,'%d-%m-%Y') ) ) as char )" & _
          " when e.schedule_type='Meeting' then cast(concat(d.user_firstname,' ',d.user_lastname,' ','Scheduled a Meeting  On', ' ',(DATE_FORMAT(e.schedule_date,'%d-%m-%Y') )) as char )" & _
          " when e.schedule_type='Mail Log' then cast (concat(d.user_firstname,' ',d.user_lastname,' ','Scheduled Mail On',' ',(DATE_FORMAT(e.schedule_date,'%d-%m-%Y'))) as char) end  from crm_trn_tschedulelog e where e.log_gid=a.log_gid group by a.log_gid)"

Answer 1

问题出在您的 CAST() 和 concat() 函数上。当函数的输入参数具有不同类型时，concat() 将为您提供 system.byte 的结果，这里您将字符串和 DATE 连接在一起。您还需要转换格式化日期并在 Concat() 之前删除转换。因此您的查询将如下所示:

 concat(d.user_firstname,' ',d.user_lastname,' ','Scheduled Mail On',' ',cast (DATE_FORMAT(e.schedule_date,'%d-%m-%Y') as char)))