使用SQL 2008 R2
我无法完成表连接。我想我只是缺少一些简单的东西。我需要加入三个表（CMS，DB，备份）并获取所有重叠以及缺少项目的完整列表。不幸的是，其中两个表没有简单的条件来进行连接。
条件：
1：每个表都可以有一行不匹配其他表
2：备份连接Server_Name和Backups.Save_Set就像DB.Instance_Name或Backups.Save_Set就像'ALL'一样
3：CMS加入Server_Name，CMS.Name就像DB.Name
从下面我的查询结果中可以看出，我很接近，但并不完全存在。我似乎无法正确连接两个顶行或我的结果，因为它们与条件不匹配。
非常感谢任何帮助。我似乎无法找到我所缺少的东西。
在底部创建/填充脚本
表：DB
ID Server_Name Instance_Name Name Company_Code
----- ---------------- -------------------- ----------- --------------------
1 Server11 MSSQLSERVER PUB 14
2 Server11 MSSQLSERVER Test 10
3 Server11 MSSQLSERVER fasys 14
4 Server12 MSSQLSERVER PROD 14
5 Server21 MSSQLSERVER PROD 24
表：CMS
ID Name Server_Name Responsible
----------- ------------------------ -------------------- ---------------
1 Site1 SQL DB PUB Server11 PDM
2 Site1 SQL DB Test Server11 RH
3 Site1 SQL DB PROD Server12 PDM
4 Site2 SQL DB PROD Server21 SP
5 Site2 SQL DB Test Server21 PDM
表：备份
ID Server_Name Backup_Retention Save_Set
------ --------------- -------------------- ---------------------
1 Server11 3Month MSSQL$MSSQLSERVER
2 Server11 3Month MSSQL$ECS
3 Server12 3Month ALL
4 Server22 3Month ALL
我接近：
SELECT AllNames.Server_Name
,CMS.Name
,CMS.Responsible
,DB.Instance_Name
,DB.Name
,DB.Company_Code
,B.Backup_Retention
,B.Save_Set
FROM (SELECT Server_Name FROM CMS
UNION
SELECT Server_Name FROM DB
UNION
SELECT Server_Name FROM Backups) AllNames
LEFT JOIN DB ON AllNames.Server_Name = DB.Server_Name
FULL JOIN Backups B ON AllNames.Server_Name = B.Server_Name
AND ((B.Save_Set LIKE '%' + DB.Instance_Name OR DB.Instance_Name IS NULL) OR B.Save_Set LIKE 'ALL')
FULL JOIN CMS ON AllNames.Server_Name = CMS.Server_Name
AND CMS.Name LIKE '%' + DB.Name
ORDER BY AllNames.Server_Name ASC
返回：
Server_Name Name Responsible Instance_Name Name Company_Code Backup_Retention Save_Set
------------- ------------------- ------------- --------------- ------- -------------- ------------------ -------------------
NULL NULL NULL NULL NULL NULL 3Month MSSQL$ECS
NULL Site2 SQL DB Test PDM NULL NULL NULL NULL NULL
Server11 Site1 SQL DB PUB PDM MSSQLSERVER PUB 14 3Month MSSQL$MSSQLSERVER
Server11 Site1 SQL DB Test RH MSSQLSERVER Test 10 3Month MSSQL$MSSQLSERVER
Server11 NULL NULL MSSQLSERVER fasys 14 3Month MSSQL$MSSQLSERVER
Server12 Site1 SQL DB PROD PDM MSSQLSERVER PROD 14 3Month ALL
Server21 Site2 SQL DB PROD SP MSSQLSERVER PROD 24 NULL NULL
Server22 NULL NULL NULL NULL NULL 3Month ALL
我想看到的内容（不要担心列标题）：
Server_Name CMS.Name CMS.Responsible DB.Instance_Name DB.Name DB.Company_Code Backups.Backup_Retention Backups.Save_Set
------------ ------------------ ---------------- ----------------- -------- ---------------- ------------------------- -----------------
Server11 Site1 SQL DB PUB PDM MSSQLSERVER PUB 14 3Month MSSQL$MSSQLSERVER
Server11 Site1 SQL DB Test RH MSSQLSERVER Test 10 3Month MSSQL$MSSQLSERVER
Server11 NULL NULL MSSQLSERVER fasys 14 3Month MSSQL$MSSQLSERVER
Server11 NULL NULL NULL NULL NULL 3Month MSSQL$ECS
Server12 Site1 SQL DB PROD PDM MSSQLSERVER PROD 14 3Month ALL
Server21 Site2 SQL DB PROD SP MSSQLSERVER PROD 24 NULL NULL
Server21 Site2 SQL DB Test PDM NULL NULL NULL NULL NULL
Server22 NULL NULL NULL NULL NULL 3Month ALL
创建/填充：
CREATE TABLE CMS(
ID int NOT NULL IDENTITY(1, 1),
Name nvarchar(60) NOT NULL,
Server_Name nvarchar(20) NOT NULL,
Responsible nvarchar(20) NULL
CONSTRAINT CMS_DB_Audit_pk PRIMARY KEY (ID)
);
CREATE TABLE DB(
ID int NOT NULL IDENTITY(1, 1),
Server_Name nvarchar(20) NOT NULL,
Instance_Name nvarchar(20) NOT NULL,
Name nvarchar(60) NOT NULL,
Company_Code nvarchar(20) NULL
CONSTRAINT DB_pk PRIMARY KEY (ID)
);
CREATE TABLE Backups (
ID int NOT NULL IDENTITY(1, 1),
Server_Name nvarchar(30) NOT NULL,
Backup_Retention nvarchar(20) NOT NULL,
Save_Set nvarchar(max) NOT NULL,
CONSTRAINT Backups_pk PRIMARY KEY (ID)
);
INSERT INTO CMS
VALUES
('Site1 SQL DB PUB','Server11','PDM'),
('Site1 SQL DB Test','Server11','RH'),
('Site1 SQL DB PROD','Server12','PDM'),
('Site2 SQL DB PROD','Server21','SP'),
('Site2 SQL DB Test','Server21','PDM');
INSERT INTO DB
VALUES
('Server11','MSSQLSERVER','PUB',14),
('Server11','MSSQLSERVER','Test',10),
('Server11','MSSQLSERVER','fasys',14),
('Server12','MSSQLSERVER','PROD',14),
('Server21','MSSQLSERVER','PROD',24);
INSERT INTO Backups
VALUES
('Server11','3Month','MSSQL$MSSQLSERVER'),
('Server11','3Month','MSSQL$ECS'),
('Server12','3Month','ALL'),
('Server22','3Month','ALL');
答案 0 :(得分：0)
你非常接近：
试试这个：
WITH AllServers AS
(
SELECT DISTINCT Server_Name FROM DB
UNION SELECT Server_Name FROM CMS
UNION SELECT Server_Name FROM Backups
)
SELECT COALESCE(AllServers.Server_Name,DB.Server_Name,CMS.Server_Name,Backups.Server_Name) AS Server_Name
,CMS.Name AS CMS_Name
,CMS.Responsible AS CMS_Responsible
,DB.Instance_Name AS DB_InstanceName
,DB.Name AS [DB_Name]
,DB.Company_Code AS DB_CompanyCode
,Backups.Backup_Retention
,Backups.Save_Set
FROM AllServers
FULL OUTER JOIN DB ON AllServers.Server_Name=DB.Server_Name
FULL OUTER JOIN Backups ON AllServers.Server_Name=Backups.Server_Name AND (Backups.Save_Set LIKE '%' + DB.Instance_Name OR Backups.Save_Set='ALL')
FULL OUTER JOIN CMS ON AllServers.Server_Name=CMS.Server_Name AND CMS.Name LIKE '%' + DB.Name
ORDER BY COALESCE(AllServers.Server_Name,DB.Server_Name,CMS.Server_Name,Backups.Server_Name)
我认为，如果您只是在第一行使用我的COALESCE(AllNames.Server_Name,DB.Server_Name,CMS.Server_Name,B.Server_Name)并将其作为ORDER BY，那么您的解决方案就非常完美......
答案 1 :(得分：0)
这对你有用吗？
SELECT coalesce(DB.Server_Name, b.Server_Name, CMS.Server_Name) Server_Name
,CMS.Name
,CMS.Responsible
,DB.Instance_Name
,DB.Name
,DB.Company_Code
,B.Backup_Retention
,B.Save_Set
FROM #DB DB --ON AllNames.Server_Name = DB.Server_Name
FULL JOIN #Backups B ON DB.Server_Name = B.Server_Name
AND ((B.Save_Set LIKE '%' + DB.Instance_Name /*OR DB.Instance_Name IS NULL*/) OR B.Save_Set LIKE 'ALL')
FULL JOIN #CMS CMS ON DB.Server_Name = CMS.Server_Name
AND CMS.Name LIKE '%' + DB.Name
ORDER BY coalesce(DB.Server_Name, b.Server_Name, CMS.Server_Name) ASC
它将结果作为
Server_Name Name Responsible Instance_Name Name Company_Code Backup_Retention Save_Set
Server11 Site1 SQL DB PUB PDM MSSQLSERVER PUB 14 3Month MSSQL$MSSQLSERVER
Server11 Site1 SQL DB Test RH MSSQLSERVER Test 10 3Month MSSQL$MSSQLSERVER
Server11 NULL NULL MSSQLSERVER fasys 14 3Month MSSQL$MSSQLSERVER
Server11 NULL NULL NULL NULL NULL 3Month MSSQL$ECS
Server12 Site1 SQL DB PROD PDM MSSQLSERVER PROD 14 3Month ALL
Server21 Site2 SQL DB PROD SP MSSQLSERVER PROD 24 NULL NULL
Server21 Site2 SQL DB Test PDM NULL NULL NULL NULL NULL
Server22 NULL NULL NULL NULL NULL 3Month ALL