Question

求助：mysql单表查询了两个结果集，怎么合并成一个结果集？

SELECT * FROM fmo_question_info WHERE question_stutas=100 ORDER BY number LIMIT 3
SELECT * FROM fmo_question_info WHERE question_stutas=30 ORDER BY number LIMIT 7

就是上面两个结果集
SELECT * FROM (
(SELECT question_id ,quedtion,option_1,option_2,option_3,option_4,correct_answer,question_stutas,number FROM fmo_question_info WHERE question_stutas=100 ORDER BY number LIMIT 3 )
UNION
( SELECT question_id ,quedtion,option_1,option_2,option_3,option_4,correct_answer,question_stutas,number FROM fmo_question_info WHERE question_stutas=30 ORDER BY number LIMIT 7 )
) WHERE 1=1
上面这一段是自己的，执行不行。
好吧，我自己搞定了，删除一点就行，
(SELECT question_id ,quedtion,option_1,option_2,option_3,option_4,correct_answer,question_stutas,number FROM fmo_question_info WHERE question_stutas=100 ORDER BY number LIMIT 3 )
UNION
( SELECT question_id ,quedtion,option_1,option_2,option_3,option_4,correct_answer,question_stutas,number FROM fmo_question_info WHERE question_stutas=30 ORDER BY number LIMIT 7 )
汗。。。。。。

Answer 1

UNION的两个语句SELECT后面的字段数量要相同