我有 2 张 table :
pages 表包含字段 id
pages2categories 表包含字段 page 和 category
我想从页面表中选择记录
where (there is a record in the pages2categories table
WHERE pages2categories::page = pages::id AND pages2categories:: category = 'X')
AND (there is also a record in the pages2categories table WHERE pages2categories::page = pages::id AND pages2categories:: category = 'Y')
AND (there is also a record in the pages2categories table WHERE pages2categories::page = pages::id AND pages2categories:: category = 'Z')
换句话说，仅当所有三个匹配记录都存在于pages2categories 表中时，才从pages 表返回记录。
示例:
页面::id
1
2
3
pages2categories::页面、pages2categories::category
1, x
1, y
2, x
2, y
2, z
3, x
结果应该只返回页面表中的记录 2。
我希望这一点很清楚。谢谢!
最佳答案
您还可以使用这个:
SELECT * FROM TABLE1 A
WHERE EXISTS (SELECT * FROm TABLE2 B WHERE A.ID = B.ID AND B.category = 'X')
AND EXISTS (SELECT * FROm TABLE2 B WHERE A.ID = B.ID AND B.category = 'Y')
AND EXISTS (SELECT * FROm TABLE2 B WHERE A.ID = B.ID AND B.category = 'Z')
关于MySQL 选择相关表中有多个匹配记录的记录，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11586694/