我有下表按用户权限对用户进行分组
userIds permissions
4,5,7,8 100,1600,500,501,502,400,401,1500,1501
权限列中的数字是部分ID。
其中一些部分可能与我检索并存储在另一个表中的其他数据有关。
sectionId userId resourceId
100 4 NULL
1600 4 NULL
500 4 NULL
501 4 NULL
502 4 NULL
400 4 NULL
401 4 1
1500 4 NULL
1501 4 NULL
100 5 NULL
1600 5 NULL
500 5 NULL
501 5 NULL
502 5 NULL
400 5 NULL
401 5 1,2
1500 5 NULL
1501 5 NULL
100 7 NULL
1600 7 NULL
500 7 NULL
501 7 NULL
502 7 NULL
400 7 NULL
401 7 2
1500 7 NULL
1501 7 NULL
100 8 NULL
1600 8 NULL
500 8 NULL
501 8 NULL
502 8 NULL
400 8 NULL
401 8 1
1500 8 NULL
1501 8 NULL
我的目标是针对第一个表的userIds列（用逗号分隔）中的每个用户，比较第二个表的每一行，以检查每个用户对于该特定sectionId是否具有相同的resourceId值。 / p>
如果每个部分的一个或多个用户具有相同的resourceId值，我希望将他们分组在一起，否则他们需要位于不同的行上。
这是我期望从提供的示例数据中得到的输出：
userIds permissions
4,8 100,1600,500,501,502,400,401,1500,1501
5 100,1600,500,501,502,400,401,1500,1501
7 100,1600,500,501,502,400,401,1500,1501
更新 我设法通过以下方式获得期望的输出：
-- Numbers table creation
DROP temporary TABLE IF EXISTS tally;
CREATE temporary TABLE tally
(
n INT NOT NULL auto_increment PRIMARY KEY
);
INSERT INTO tally
(n)
SELECT NULL
FROM (SELECT 0 AS N
UNION ALL
SELECT 1
UNION ALL
SELECT 2
UNION ALL
SELECT 3
UNION ALL
SELECT 4
UNION ALL
SELECT 5
UNION ALL
SELECT 6
UNION ALL
SELECT 7
UNION ALL
SELECT 8
UNION ALL
SELECT 9) a,
(SELECT 0 AS N
UNION ALL
SELECT 1
UNION ALL
SELECT 2
UNION ALL
SELECT 3
UNION ALL
SELECT 4
UNION ALL
SELECT 5
UNION ALL
SELECT 6
UNION ALL
SELECT 7
UNION ALL
SELECT 8
UNION ALL
SELECT 9) b;
-- Split users by comma from first table
DROP temporary TABLE IF EXISTS tmppermissions2;
CREATE temporary TABLE tmppermissions2
(
userid VARCHAR(255) NOT NULL,
permissions TEXT NOT NULL
);
INSERT INTO tmppermissions2
SELECT userid,
permissions
FROM (SELECT Substring_index(Substring_index(t.userids, ',', tally.n), ',', -1
)
userId,
t.permissions
permissions
FROM tally
INNER JOIN tmppermissions t
ON Char_length(t.userids) - Char_length(
REPLACE(t.userids, ',',
'')) >=
tally.n - 1
ORDER BY n) AS split;
-- Gets the users with the same permissions
DROP temporary TABLE IF EXISTS sharedprofiles;
CREATE temporary TABLE sharedprofiles
(
userids VARCHAR(255) NOT NULL,
permissions TEXT NOT NULL,
profileid INT(11)
);
INSERT INTO sharedprofiles
SELECT Group_concat(userid),
permissions,
NULL
FROM tmppermissions2
WHERE userid NOT IN (SELECT split.userid
FROM (SELECT Substring_index(Substring_index(r.userids,
',',
t.n), ',', -1)
userId
FROM tally t
INNER JOIN tmppermissions r
ON Char_length(r.userids)
- Char_length(
REPLACE(r.userids, ',',
'')) >=
t.n - 1
WHERE Position(',' IN r.userids) > 0
ORDER BY n) AS split
WHERE split.userid IN (SELECT *
FROM (SELECT Group_concat(userid
ORDER
BY userid ASC)
AS
users
FROM
tmpcurrentresources2
GROUP BY resourceid,
sectionid
ORDER BY users) b
WHERE Position(',' IN b.users) =
0))
GROUP BY permissions
ORDER BY Group_concat(userid);
-- Gets the users with specific permissions
DROP temporary TABLE IF EXISTS singleprofiles;
CREATE temporary TABLE singleprofiles
(
userid VARCHAR(255) NOT NULL,
permissions TEXT NOT NULL,
profileid INT(11)
);
INSERT INTO singleprofiles
SELECT userid,
permissions,
NULL
FROM tmppermissions2
WHERE userid IN (SELECT split.userid
FROM (SELECT Substring_index(Substring_index(r.userids, ',',
t.n),
',', -1)
userId
FROM tally t
INNER JOIN tmppermissions r
ON Char_length(r.userids) -
Char_length(
REPLACE(r.userids, ',',
'')) >=
t.n - 1
WHERE Position(',' IN r.userids) > 0
ORDER BY n) AS split
WHERE split.userid IN (SELECT *
FROM (SELECT Group_concat(userid
ORDER BY
userid ASC)
AS
users
FROM tmpcurrentresources2
GROUP BY resourceid,
sectionid
ORDER BY users) b
WHERE Position(',' IN b.users) = 0))
ORDER BY userid;
-- Merge the results
SELECT *
FROM sharedprofiles
UNION
SELECT *
FROM singleprofiles;
我想知道是否有更简洁的方法来实现相同的结果。
答案 0 :(得分：0)
（我怀疑您已经知道）解决方案是标准化您的架构。
所以不是...
userIds permissions
4,5 100,1600,500
...您可能有
userIds permissions
4 100
4 1600
4 500
5 100
5 1600
5 500