鏈接兩個表沒有任何共同之處

Question

我想加入這些語句：

select min(len(Password)) as min, 
     max(len(Password)) as max, 
     avg(len(Password)) as avg 
FROM Customer.dbo.Password 

UNION ALL 
select min(len(password2)) as min, 
     max(len(password2)) as max, 
     avg(len(password2)) as avg 
FROM website.dbo.password2 

對於這些：

SELECT c.name COLLATE SQL_Latin1_General_CP1_CI_AS colName, o.name COLLATE SQL_Latin1_General_CP1_CI_AS tableName, 'website' db FROM website.sys.all_columns as c INNER JOIN website.sys.all_objects o ON c.object_id = o.object_id WHERE c.name like '%password%' AND type = 'U' 

UNION 
SELECT c.name COLLATE SQL_Latin1_General_CP1_CI_AS colName, o.name COLLATE SQL_Latin1_General_CP1_CI_AS tableName, 'Customer' db FROM Customer.sys.all_columns as c INNER JOIN Customer.sys.all_objects o ON c.object_id = o.object_id WHERE c.name like '%password%' AND type = 'U' 

他們沒有共同的列。前兩個SELECT語句產生密碼長度的最小值，最大值和平均值的三列，其次兩個產生保存密碼的colName，tableName和db名稱。

我想在一個表中顯示兩個結果集純粹是出於視覺原因，以獲得相應的min，max，avg到適當的colName，tableName和db。

我試圖做這樣說：

DECLARE @numberTable TABLE (link nvarchar(500), max int, min int, avg int) 
INSERT INTO @numberTable 

select 'link', min(len(Password)) as min, 
     max(len(Password)) as max, 
     avg(len(Password)) as avg 
FROM Customer.dbo.Password UNION ALL 
select 'link', min(len(password2)) as min, 
     max(len(password2)) as max, 
     avg(len(password2)) as avg 
FROM website.dbo.password2 

SELECT * FROM @numberTable ORDER BY max 

DECLARE @myTable TABLE (link nvarchar(500), colName nvarchar(500), tableName nvarchar(500), db nvarchar(500)) 
INSERT INTO @myTable 

SELECT 'link', c.name COLLATE SQL_Latin1_General_CP1_CI_AS colName, o.name COLLATE SQL_Latin1_General_CP1_CI_AS tableName, 'website' db FROM website.sys.all_columns as c INNER JOIN website.sys.all_objects o ON c.object_id = o.object_id WHERE c.name like '%password%' AND type = 'U' UNION 

SELECT 'link', c.name COLLATE SQL_Latin1_General_CP1_CI_AS colName, o.name COLLATE SQL_Latin1_General_CP1_CI_AS tableName, 'Customer' db FROM Customer.sys.all_columns as c INNER JOIN Customer.sys.all_objects o ON c.object_id = o.object_id WHERE c.name like '%password%' AND type = 'U' 

SELECT * FROM @myTable ORDER BY db 

SELECT link 
FROM @myTable 
LEFT OUTER JOIN @numberTable 
ON @myTable.link = @numberTable.link 

不幸的是這沒有奏效。

我正在使用Microsoft SQL Server 2008.

希望我以後說的是有道理的。

Answer 1

您可以使用cross join連接兩個不相關的表：

SELECT c.name COLLATE SQL_Latin1_General_CP1_CI_AS colName 
,  o.name COLLATE SQL_Latin1_General_CP1_CI_AS tableName 
,  'website' db 
,  pwd.[min] 
,  pwd.[max] 
,  pwd.[avg] 
FROM website.sys.all_columns as c 
INNER JOIN 
     website.sys.all_objects o 
ON  c.object_id = o.object_id 
CROSS JOIN 
     (
     select min(len(Password)) as min, 
       max(len(Password)) as max, 
       avg(len(Password)) as avg 
     FROM website.dbo.Password   
     ) as pwd 
WHERE c.name like '%password%' 
     AND type = 'U' 

UNION 

SELECT c.name COLLATE SQL_Latin1_General_CP1_CI_AS colName 
,  o.name COLLATE SQL_Latin1_General_CP1_CI_AS tableName 
,  'Customer' db 
,  pwd.[min] 
,  pwd.[max] 
,  pwd.[avg] 
FROM Customer.sys.all_columns as c 
INNER JOIN 
     Customer.sys.all_objects o 
ON  c.object_id = o.object_id 
CROSS JOIN 
     (
     select min(len(Password)) as min, 
       max(len(Password)) as max, 
       avg(len(Password)) as avg 
     FROM Customer.dbo.Password   
     ) as pwd 
WHERE c.name like '%password%' 
     AND type = 'U' 

Answer 2

創建任意東西，他們的共同點和他們一起

Select * 
from 
(
select 
     1 as RowID, 
     min(len(Password)) as min, 
     max(len(Password)) as max, 
     avg(len(Password)) as avg 
FROM Customer.dbo.Password 

UNION ALL 
select 
     2, 
     min(len(password2)) as min, 
     max(len(password2)) as max, 
     avg(len(password2)) as avg 
FROM website.dbo.password2 
) t1 
inner join 
(


SELECT 1 as RowID, c.name COLLATE SQL_Latin1_General_CP1_CI_AS colName, o.name COLLATE SQL_Latin1_General_CP1_CI_AS tableName, 'website' db FROM website.sys.all_columns as c INNER JOIN website.sys.all_objects o ON c.object_id = o.object_id WHERE c.name like '%password%' AND type = 'U' 

UNION 
SELECT 2, c.name COLLATE SQL_Latin1_General_CP1_CI_AS colName, o.name COLLATE SQL_Latin1_General_CP1_CI_AS tableName, 'Customer' db FROM Customer.sys.all_columns as c INNER JOIN Customer.sys.all_objects o ON c.object_id = o.object_id WHERE c.name like '%password%' AND type = 'U' 
) t2 
    on t1.rowID = t2.rowID