需要SELECT语句的帮助吗

我将记录和可附加到记录的SearchTag之间的关系表示为：

TABLE RECORDS
id
name

TABLE SEARCHTAGS 
id
recordid
name

我希望能够选择记录的基础上，他们的搜索标签。例如，我希望能够选择具有SearchTag的所有记录：

(1 OR 2 OR 5) AND (6 OR 7) AND (10)

使用上述数据结构，我不确定如何构造SQL来实现这一点

有什么建议吗

---

谢谢

不知道如何在mysql中实现，但在t-sql中，您可以执行以下操作：

SELECT id, name FROM RECORDS where id in (SELECT recordid from SEARCHTAGS where id in (1,2,5,6,7,10))

我可能不完全理解你的问题。。。但我已经尽力了。

试试：

SELECT R.*
FROM RECORDS R, SEARCHTAGS S
WHERE R.id == S.recordid
AND S.name in (1,2,5,6,7,10);

---

不知道您是否需要S.name或S.id，但这是一个示例。

您可能需要尝试以下操作：

SELECT
  id, name
FROM
  records
WHERE
  EXISTS (
    SELECT 1 FROM searchtags WHERE recordid = records.id AND id IN (1, 2, 5)
  )
  AND EXISTS (
    SELECT 1 FROM searchtags WHERE recordid = records.id AND id IN (6, 7)
  )
  AND EXISTS (
    SELECT 1 FROM searchtags WHERE recordid = records.id AND id IN (10)
  )

SELECT    r.id, r.name
FROM      records r
WHERE     EXISTS (SELECT NULL FROM searchtags WHERE recordid = r.id AND id IN (1, 2, 5)) AND 
          EXISTS (SELECT NULL FROM searchtags WHERE recordid = r.id AND id IN (6, 7)) AND 
          EXISTS (SELECT NULL FROM searchtags WHERE recordid = r.id AND id IN (10));

测试用例：请注意，只有记录1和4将满足查询条件

CREATE TABLE records (id int, name varchar(10));
CREATE TABLE searchtags (id int, recordid int);

INSERT INTO records VALUES (1, 'a');
INSERT INTO records VALUES (2, 'b');
INSERT INTO records VALUES (3, 'c');
INSERT INTO records VALUES (4, 'd');

INSERT INTO searchtags VALUES (1,  1);
INSERT INTO searchtags VALUES (2,  1);
INSERT INTO searchtags VALUES (6,  1);
INSERT INTO searchtags VALUES (10, 1);
INSERT INTO searchtags VALUES (1,  2);
INSERT INTO searchtags VALUES (2,  2);
INSERT INTO searchtags VALUES (3,  2);
INSERT INTO searchtags VALUES (1,  3);
INSERT INTO searchtags VALUES (10, 3);
INSERT INTO searchtags VALUES (5,  4);
INSERT INTO searchtags VALUES (7,  4);
INSERT INTO searchtags VALUES (10, 4);

结果:

+------+------+
| id   | name |
+------+------+
|    1 | a    |
|    4 | d    |
+------+------+
2 rows in set (0.01 sec)

---

我第一次误读了这个问题，以为它是在问我

(1 AND 2 AND 5) OR (6 AND 7) OR (10)

而不是正确的

(1 OR 2 OR 5) AND (6 OR 7) AND (10)

到目前为止，所有的答案都集中在回答具体的例子，而不是解决更一般的问题“假设我下次想要一套不同的标准”

实际问题 对于实际问题（查询1），我没有比所选答案更好的答案了：

这可以写成SearchTags表的3个别名的连接

替代问题 有几种方法可以回答这个问题——我认为这是最简洁和可扩展的方法。显然，这一项（10）很简单（查询2）：

这两项（6或7）可以通过（查询3）完成：

这三项（1、2、5）可以通过（查询4）完成：

整个集合可以是三个术语的联合体

推广解决方案 此解决方案的缺点是，必须为每一组项手动创建SQL。 如果要自动化“SQL生成”，则需要控制数据（一组有趣的搜索标记）在表中：

CREATE TABLE InterestingTags(GroupID INTEGER, TagID INTEGER);
INSERT INTO InterestingTags(1, 1);
INSERT INTO InterestingTags(1, 2);
INSERT INTO InterestingTags(1, 5);
INSERT INTO InterestingTags(2, 6);
INSERT INTO InterestingTags(2, 7);
INSERT INTO InterestingTags(3, 10);

对于要求“（1或2或5）和（…）”（合取范式）的查询，您可以编写（query 5）：

这将检查给定记录的不同“有趣的标记组”的数量是否等于“有趣的标记组”的总数

对于请求“（1、2和5）或（…）”（析取范式）的查询，您可以编写一个带有兴趣标记的联接，并检查记录的条目数是否与标记组的条目数相同（query 6）：

测试数据 我从Daniel Vassalo的答案中获取了测试数据，并添加了一些额外的值：

CREATE TABLE records (id int, name varchar(10));
CREATE TABLE searchtags (id int, recordid int);

INSERT INTO records VALUES (1, 'a');
INSERT INTO records VALUES (2, 'b');
INSERT INTO records VALUES (3, 'c');
INSERT INTO records VALUES (4, 'd');

INSERT INTO records VALUES (11, 'A11');
INSERT INTO records VALUES (21, 'B12');
INSERT INTO records VALUES (31, 'C13');
INSERT INTO records VALUES (41, 'D14');
INSERT INTO records VALUES (51, 'E15');
INSERT INTO records VALUES (61, 'F16');

INSERT INTO searchtags VALUES (1,  1);
INSERT INTO searchtags VALUES (2,  1);
INSERT INTO searchtags VALUES (6,  1);
INSERT INTO searchtags VALUES (10, 1);
INSERT INTO searchtags VALUES (1,  2);
INSERT INTO searchtags VALUES (2,  2);
INSERT INTO searchtags VALUES (3,  2);
INSERT INTO searchtags VALUES (1,  3);
INSERT INTO searchtags VALUES (10, 3);
INSERT INTO searchtags VALUES (5,  4);
INSERT INTO searchtags VALUES (7,  4);
INSERT INTO searchtags VALUES (10, 4);

INSERT INTO searchtags VALUES (1,  11);
INSERT INTO searchtags VALUES (2,  11);
INSERT INTO searchtags VALUES (5,  11);
INSERT INTO searchtags VALUES (6,  21);
INSERT INTO searchtags VALUES (7,  21);
INSERT INTO searchtags VALUES (10, 31);
INSERT INTO searchtags VALUES (1,  41);
INSERT INTO searchtags VALUES (6,  41);
INSERT INTO searchtags VALUES (10, 41);
INSERT INTO searchtags VALUES (2,  51);
INSERT INTO searchtags VALUES (5,  51);
INSERT INTO searchtags VALUES (10, 51);
INSERT INTO searchtags VALUES (7,  61);
INSERT INTO searchtags VALUES (2,  61);
INSERT INTO searchtags VALUES (1,  61);

CREATE TABLE InterestingTags(GroupID INTEGER, TagID INTEGER);
INSERT INTO InterestingTags VALUES(1, 1);
INSERT INTO InterestingTags VALUES(1, 2);
INSERT INTO InterestingTags VALUES(1, 5);
INSERT INTO InterestingTags VALUES(2, 6);
INSERT INTO InterestingTags VALUES(2, 7);
INSERT INTO InterestingTags VALUES(3, 10);

测试结果 我得到的结果是：

查询1

1   a
4   d
41  D14

查询2

1   a
3   c
4   d
31  C13
41  D14
51  E15

查询3

21  B12

查询4

11  A11

查询5

1   a
41  D14
4   d

查询6

4   d
31  C13
3   c
1   a
41  D14
51  E15

---

显然，如果我想要以特定的顺序输出，我会在查询中添加orderby子句。

（1或2或5）和（6或7）以及（10）

！=

（1或2或5或6或7或10）

似乎很多人都犯了这个错误

CREATE TABLE records (id int, name varchar(10));
CREATE TABLE searchtags (id int, recordid int);

INSERT INTO records VALUES (1, 'a');
INSERT INTO records VALUES (2, 'b');
INSERT INTO records VALUES (3, 'c');
INSERT INTO records VALUES (4, 'd');

INSERT INTO records VALUES (11, 'A11');
INSERT INTO records VALUES (21, 'B12');
INSERT INTO records VALUES (31, 'C13');
INSERT INTO records VALUES (41, 'D14');
INSERT INTO records VALUES (51, 'E15');
INSERT INTO records VALUES (61, 'F16');

INSERT INTO searchtags VALUES (1,  1);
INSERT INTO searchtags VALUES (2,  1);
INSERT INTO searchtags VALUES (6,  1);
INSERT INTO searchtags VALUES (10, 1);
INSERT INTO searchtags VALUES (1,  2);
INSERT INTO searchtags VALUES (2,  2);
INSERT INTO searchtags VALUES (3,  2);
INSERT INTO searchtags VALUES (1,  3);
INSERT INTO searchtags VALUES (10, 3);
INSERT INTO searchtags VALUES (5,  4);
INSERT INTO searchtags VALUES (7,  4);
INSERT INTO searchtags VALUES (10, 4);

INSERT INTO searchtags VALUES (1,  11);
INSERT INTO searchtags VALUES (2,  11);
INSERT INTO searchtags VALUES (5,  11);
INSERT INTO searchtags VALUES (6,  21);
INSERT INTO searchtags VALUES (7,  21);
INSERT INTO searchtags VALUES (10, 31);
INSERT INTO searchtags VALUES (1,  41);
INSERT INTO searchtags VALUES (6,  41);
INSERT INTO searchtags VALUES (10, 41);
INSERT INTO searchtags VALUES (2,  51);
INSERT INTO searchtags VALUES (5,  51);
INSERT INTO searchtags VALUES (10, 51);
INSERT INTO searchtags VALUES (7,  61);
INSERT INTO searchtags VALUES (2,  61);
INSERT INTO searchtags VALUES (1,  61);

CREATE TABLE InterestingTags(GroupID INTEGER, TagID INTEGER);
INSERT INTO InterestingTags VALUES(1, 1);
INSERT INTO InterestingTags VALUES(1, 2);
INSERT INTO InterestingTags VALUES(1, 5);
INSERT INTO InterestingTags VALUES(2, 6);
INSERT INTO InterestingTags VALUES(2, 7);
INSERT INTO InterestingTags VALUES(3, 10);

1   a
4   d
41  D14

1   a
3   c
4   d
31  C13
41  D14
51  E15

21  B12

11  A11

1   a
41  D14
4   d

4   d
31  C13
3   c
1   a
41  D14
51  E15