默認排序,order by rank desc,但是rank有可能爲null,在rank爲null的情況下 需要用order by createTime
如下:
order by dc.rank desc, dc.createTimedesc
默認排序,order by rank desc,但是rank有可能爲null,在rank爲null的情況下 需要用order by createTime
如下:
order by dc.rank desc, dc.createTimedesc