insert into rd8_read8_volume set book_id=( select book_id from rd8_read8_book where book_title='天下无贼'),volume_name='作品相关',volume_chapterorderid=1
提示错误。
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Mysql错误疑问:insert查询不能关联子语句?
insert into rd8_read8_volume set book_id=( select book_id from rd8_read8_book where book_title='天下无贼'),volume_name='作品相关',volume_chapterorderid=1 提示错误。
insert into rd8_read8_volume set book_id=( select book_id from rd8_read8_book where book_title='天下无贼'),volume_name='作品相关',volume_chapterorderid=1
???
即便你的mysql支持子查询,这样写也是错误的!
因为 select book_id from rd8_read8_book where book_title='天下无贼'; 可能产生一条以上的记录
正确的写法是
insert into rd8_read8_volume (book_id,volume_name,volume_chapterorderid) select book_id,'作品相关',1 from rd8_read8_book where book_title='天下无贼'
分开写不就完了?
select @bid:=book_id from rd8_read8_book where book_title='天下无贼';
insert into rd8_read8_volume (book_id,volume_name,volume,chapter) values(@bid,'作品相关',1);