SQL检测开始日期 结束日期 是否存在交叉

检测开始日期 结束日期 是否存在交叉

where 1=1 "+tj+" and ((starttime>="+starttime+" and starttime<="+endtime+") " +
" or (endtime>="+starttime+" and endtime<="+endtime+" ) or (starttime>="+starttime+" and endtime<="+endtime+" ) " +
" or (starttime<="+starttime+" and endtime>="+endtime+" ))";