INSERT INTO UnivAssignToClass ( classesId, assignmentId , areaid ) Values ( #{classesId}, #{assignmentId} , #{areaid} ) UPDATE UnivAssignToClass SET classesId = #{classesId}, assignmentId = #{assignmentId} , areaid = #{areaid} where classesId = #{classesId} and assignmentId = #{assignmentId} INSERT INTO UnivAssignToClass ( classesId, assignmentId , areaid ) Values ( #{item.classesId}, #{item.assignmentId} , #{item.areaid} ) SELECT count(*) FROM UnivAssignToClass a INNER JOIN UnivAssignment b on a.classesId = #{classesId} AND a.assignmentId = b.assignmentId AND b.status = 1 and a.areaid = #{areaid} select classesid , assignmentid , areaid from Univassigntoclass where assignmentid in ( select assignmentid from Univassignment where created between #{start} and #{end} ) SELECT a.classesId as "classesId",c.classname as "className" FROM univAssignToClass a inner join univclasses c on a.classesid=c.classesid and c.status=1 and a.assignmentId=#{assignmentId}