[英]Need help regarding mysql query to search all columns as requested with different possible combinations
[英]Query 6 different columns with 6 numbers in all combinations sql
我有一个包含6列n1-n6的数据库。 每个都有一个数字,因此每一行有6个不同的数字。 查询时,我要检查数据库中每行要提交的6个数字。 我需要查询来更改组合,因此理论上可以完成36个查询。
因此,示例数据集可能是
N1 N2 N3 N4 N5 N6
1 12 54 36 17 23
我要查询的数字是
1 54 36 17 23 12
因此它们是相同的,但是因为它们的顺序不同,所以不会返回结果。 所有6个必须匹配才能返回正值。
查询示例:
$sql = "SELECT * FROM numbers WHERE n1 = :n1 AND n2 = :n2 AND n3 = :n3 AND n4 = :n4 AND n5 = :n5 AND n6 = :n6";
$stmt = $conn->prepare($sql);
$stmt->bindParam(":n1", $n1);
$stmt->bindParam(":n2", $n2);
$stmt->bindParam(":n3", $n3);
$stmt->bindParam(":n4", $n4);
$stmt->bindParam(":n5", $n5);
$stmt->bindParam(":n6", $n6);
$stmt->execute();
我可以使用36个不同的查询来执行此操作,但是能够一次完成查询将更加有用。
嗯。 。 。 连续存储六个数字听起来像是错误的数据格式。 如果这些是行而不是列,那么会更容易。
但是,假设没有重复,您可以执行以下操作:
SELECT *
FROM numbers
WHERE n1 IN (:n1, :n2, :n3, :n4, :n5, :n6) AND
n2 IN (:n1, :n2, :n3, :n4, :n5, :n6) AND
n3 IN (:n1, :n2, :n3, :n4, :n5, :n6) AND
n4 IN (:n1, :n2, :n3, :n4, :n5, :n6) AND
n5 IN (:n1, :n2, :n3, :n4, :n5, :n6) AND
n6 IN (:n1, :n2, :n3, :n4, :n5, :n6);
CREATE TABLE YourTable (n1 INT, n2 INT, n3 INT, n4 INT, n5 INT, n6 INT);
INSERT INTO YourTable (n1,n2,n3,n4,n5,n6)
VALUES (1,12,54,36,17,23);
CREATE TABLE ValuesTable (Id INT NOT NULL AUTO_INCREMENT,Value INT, primary key(id));
INSERT INTO ValuesTable (Value) VALUES (1),(12),(54),(36),(17),(23);
SELECT t.*
FROM
YourTable t
INNER JOIN (
SELECT
v1.Value as n1
,v2.Value as n2
,v3.Value as n3
,v4.Value as n4
,v5.Value as n5
,v6.Value as n6
FROm
ValuesTable v1
INNER JOIN ValuesTable v2
ON v1.Id <> v2.Id
INNER JOIN ValuesTable v3
ON v1.Id <> v3.Id
AND v2.Id <> v3.Id
INNER JOIN ValuesTable v4
ON v1.Id <> v4.Id
AND v2.Id <> v4.Id
AND v3.Id <> v4.Id
INNER JOIN ValuesTable v5
ON v1.Id <> v5.Id
AND v2.Id <> v5.Id
AND v3.Id <> v5.Id
AND v4.Id <> v5.Id
INNER JOIN ValuesTable v6
ON v1.Id <> v6.Id
AND v2.Id <> v6.Id
AND v3.Id <> v6.Id
AND v4.Id <> v6.Id
AND v5.Id <> v6.Id
) v
ON t.n1 = v.n1
AND t.n2 = v.n2
AND t.n3 = v.n3
AND t.n4 = v.n4
AND t.n5 = v.n5
AND t.n6 = v.n6
;
通过使用6个内部联接将6个数字添加到具有自动增量的表/临时表上,您可以生成所有排列(6个阶乘或720个组合),然后对表进行内部联接并获得所需的结果。 通过使用ID字段,它将允许您在列表中重复输入数字,例如1、12、12...。
另一个选择是通过将所有列合并到一个列中来对表进行自我重新排序,然后,您可以对具有6个值的临时表进行联接并计数以确保6个联接,或者可以对列和使用条件聚合使它们再次进入列,并测试与列表中相同的顺序。
假设您可能有重复项,并且有一个主键(下例中的id
):
select a.* from numbers a
inner join
(select id, group_concat(n order by n asc separator ' ') as n from (
select id, n1 as n from numbers
union all
select id, n2 as n from numbers
union all
select id, n3 as n from numbers
union all
select id, n4 as n from numbers
union all
select id, n5 as n from numbers
union all
select id, n6 as n from numbers
) b group by id) c on a.id = c.id
where c.n = '1 12 17 23 36 54';
唯一的要求是将要查询的数字连接到一个按升序排列的字符串中。
这是使用UNION ALL运算符进行计数检查的简单逻辑。
考虑下表包含数据
IF OBJECT_ID('dbo.Table1', 'U') IS NOT NULL
DROP TABLE dbo.Table1;
CREATE TABLE dbo.Table1 (n1 INT, n2 INT, n3 INT, n4 INT, n5 INT, n6 INT);
INSERT INTO Table1 (n1,n2,n3,n4,n5,n6)
VALUES (13,12,54,34,17,23);
INSERT INTO Table1 (n1,n2,n3,n4,n5,n6)
VALUES (1,12,54,36,17,23);
这是您的输入,我们将在表中检查数据。
IF OBJECT_ID('tempdb.dbo.#MyInput', 'U') IS NOT NULL
DROP TABLE #MyInput;
CREATE TABLE dbo.#MyInput (Id INT NOT NULL identity(1,1),Value INT, primary key(id));
INSERT INTO #MyInput (Value) VALUES (12),(13),(54),(36),(17),(23);
关键步骤到了。 您必须在基表的所有列上应用UNION ALL运算符,即。 表1带有行号。
IF OBJECT_ID('tempdb.dbo.#NumberedTable1','U') IS NOT NULL
DROP TABLE #NumberedTable1
GO
SELECT ROW_NUMBER()OVER(ORDER BY n1) Rno, n1 value
INTO #NumberedTable1
FROM Table1
UNION ALL
SELECT ROW_NUMBER()OVER(ORDER BY n1) Rno, n2
FROM Table1
UNION ALL
SELECT ROW_NUMBER()OVER(ORDER BY n1) Rno, n3
FROM Table1
UNION ALL
SELECT ROW_NUMBER()OVER(ORDER BY n1) Rno, n4
FROM Table1
UNION ALL
SELECT ROW_NUMBER()OVER(ORDER BY n1) Rno, n5
FROM Table1
UNION ALL
SELECT ROW_NUMBER()OVER(ORDER BY n1) Rno, n6
FROM Table1
以下循环将检查输入记录是否与表中存储的数字匹配。 如果与任何存储的数据匹配,则将获得打印结果。 您可以根据需要更改输出模式.. :)
DECLARE @MaxLoop int
SELECT @MaxLoop=MAX(Rno)
FROM #NumberedTable1
WHILE (@MaxLoop>=1)
BEGIN
IF (SELECT COUNT(1)
FROM #NumberedTable1 t
JOIN #MyInput b ON t.Rno=@MaxLoop and t.value=b.Value)=6 -- SPECIFY THE COLUMN COUNT
BEGIN
Print'Combination exists';
BREAK;
END
ELSE
BEGIN
SET @MaxLoop=@MaxLoop-1
IF @MaxLoop=-0
Print'Combination does not exists'
END
END
快乐编码.. :)
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