select id, name, filetype, type, fileurl, createuserid, create_time from by_files
insert into by_files
name,filetype,type,fileurl,createuserid,create_time,#{name},#{filetype},#{type},#{fileurl},#{createuserid},#{createTime},
update by_files
name = #{name},filetype = #{filetype},type = #{type},fileurl = #{fileurl},createuserid = #{createuserid},create_time = #{createTime},
where id = #{id}
delete from by_files where id = #{id}
delete from by_files where id in
#{id}