MySQL查询无法正常工作-无法找出原因

Question

I have this query that I'm pretty sure it set up correctly, but it keeps returning no results, when I know there is 1 row that should be returned.

SELECT
    `t1`.id,
    `t1`.length,
    `t2`.last,
    `t2`.first,
    `t4`.name,
    `t5`.text
FROM `res` AS `t1`
INNER JOIN `pt` AS `t2`
     ON `t1`.ptid=`t2`.pt
INNER JOIN `docs` AS `t3`
     ON `t1`.doc=`t3`.did
LEFT JOIN `user` AS `t4`
     ON `t3`.user=`t4`.id
INNER JOIN `desc` AS `t5`
     ON `t1`.desc=`t5`.id

ORDER BY
     `t1`.date ASC

Again, not getting an error - just getting no results.

Thanks

Answer 1

desc is a reserved word. You need to put backticks around it.

JOIN `desc` as `t5` ON `t1`.desc=`t5`.id

should be

JOIN `desc` as `t5` ON `t1`.`desc`=`t5`.id