Question

我有这张表（A）：

ID  PROD PER
1   45  1
2   21  2
3   45  3
4   223 12
5 543 6

表B：

ID  CAS DATE
1   ttt 062017
2   ddd 062017
3   fff 062017
4   fre 062017
5 grs 062017

条件：

PER = 1 and DATE between 01%%%% and 12%%%%
PER = 2 and DATE=02%%%% OR DATE=04%%%% OR DATE=06%%%% OR DATE=08%%%% OR DATE=10%%%% OR DATE=12%%%%
PER = 3 and DATE=03%%%% OR DATE=06%%%% OR DATE=09%%%% OR DATE=12%%%%
PER = 4 and DATE=04%%%% OR DATE=08%%%% OR DATE=12%%%%
PER = 6 and DATE=06%%%% OR DATE=12%%%%
PER = 12 and DATE=12%%%%

我想加入A和B：

select * from A
join B
on A.ID=B.ID
CONDITIONS

预期结果：

ID  PROD CAS PER DATE
1   45  ttt 1 062017
2   21  ddd 2 062017
3   45  fff 3 062017
5 543 grs 6 062017

我希望我已经正确解释了。简而言之，我正在寻找的是具有暴露条件的表之间的连接。

Answer 1

SELECT  * 
FROM A
JOIN B ON 
     A.ID = B.ID
WHERE
(PER = 1 and (DATE between 01%%%% OR 12%%%%)) OR
(PER = 2 and (DATE=02%%%% OR DATE=04%%%% OR DATE=06%%%% OR DATE=08%%%% OR DATE=10%%%% OR DATE=12%%%%)) OR
(PER = 3 and (DATE=03%%%% OR DATE=06%%%% OR DATE=09%%%% OR DATE=12%%%%)) OR
(PER = 4 and (DATE=04%%%% OR DATE=08%%%% OR DATE=12%%%%)) OR
(PER = 12 and DATE=12%%%%)

有关详细信息，请访问：https://www.w3schools.com/sql/sql_where.asp

Answer 2

试试这个（对于mysql）：

select a.*, b.cas, b.`date`
from tablea a
join tableb b
on a.id = b.id
and mod(left(b.`date`, 2) + 0, a.per) = 0

rextester中的

Demo。

Answer 3

您可以使用以下查询

select A.ID,A.PROD,D.CAS,A.PER,B.DATE from A
join B
on A.ID=B.ID
WHERE 
(A.PER = 1 and B.DATE between 01%%%% and 12%%%%) AND
(A.PER = 2 and B.DATE=02%%%% OR B.DATE=04%%%% OR B.DATE=06%%%% OR B.DATE=08%%%% OR B.DATE=10%%%% OR B.DATE=12%%%%) AND
(A.PER = 3 and B.DATE=03%%%% OR B.DATE=06%%%% OR B.DATE=09%%%% OR B.DATE=12%%%%) AND
(A.PER = 4 and B.DATE=04%%%% OR B.DATE=08%%%% OR B.DATE=12%%%%) OR
(A.PER = 12 and B.DATE=12%%%%)

如有任何问题，请告诉我

Answer 4

您应该使用LIKE关键字进行比较。见下文：

SELECT          tab1.id, 
                tab1.PROD, 
                tab2.CAS, 
                tab2.Datum
FROM            Table1 tab1
INNER JOIN      Table2 tab2 ON tab1.ID = tab2.ID
WHERE           (tab1.PER = 1 AND tab2.DATUM BETWEEN '01%' AND '12%')
OR              (tab1.PER = 2 AND (tab2.DATUM LIKE '02%' OR tab2.DATUM LIKE '04%' OR tab2.DATUM LIKE '06%' OR tab2.DATUM LIKE '08%' OR tab2.DATUM LIKE '10%' OR tab2.DATUM LIKE '12%'))
OR              (tab1.PER = 3 AND (tab2.DATUM LIKE '03%' OR tab2.DATUM LIKE '06%' OR tab2.DATUM LIKE '09%' OR tab2.DATUM LIKE '12%'))
OR              (tab1.PER = 4 AND (tab2.DATUM LIKE '04%' OR tab2.DATUM LIKE '08%' OR tab2.DATUM LIKE '12%'))
OR              (tab1.PER = 12 AND tab2.DATUM = '12%')

这是一个简单的解决方案，应该适用于所有主要的DBMS。

你可以在这里看到这个 - ＆gt; http://rextester.com/MYBHC51508

希望这有帮助!!!

怎么办在sql中加入这些条件

4 个答案: