select id,crawl_source_id,crawl_book_id,crawl_last_time,pic_url from book where last_index_update_time > #{startDate} and crawl_source_id is not null order by crawl_last_time limit ${limit} select sum(t2.word_count) from book t1 inner join book_index t2 on t1.id = t2.book_id and t1.id = #{bookId} update book set crawl_last_time = #{currentDate} where id in #{book.id}