舊式JOIN語法在T-SQL中意味着什麼？

Question

我需要編輯舊式的T-SQL代碼。

• =*是什麼意思？

• *=是什麼意思？

我想，他們是加入，但我不知道，什麼樣的加入類型是他們每個人。

Answer 1

我找到答案！

-- Example 1: Deprecated syntax for an inner join 
SELECT [T2].[c3], [T1].[c3] 
FROM [dbo].[Table2] T2, [dbo].[Table1] T1 
WHERE [T1].[ID] = [T2].[ID] 

-- Example 2: Current syntax for an inner join 
SELECT [T2].[c3], [T1].[c3] 
FROM [dbo].[Table2] AS T2 
INNER JOIN [dbo].[Table1] as T1 
ON [T2].[ID] = [T2].[ID] 

-- Example 3: Deprecated syntax for a left outer join 
SELECT [T2].[c3], [T1].[c3] 
FROM [dbo].[Table2] T2, [dbo].[Table1] T1 
WHERE [T1].[ID] *= [T2].[ID] 

-- Example 4: Fixed syntax for a left outer join 
SELECT [T2].[c3], [T1].[c3] 
FROM [dbo].[Table2] AS T2 
LEFT OUTER JOIN [dbo].[Table1] as T1 
ON [T2].[ID] = [T2].[ID] 

-- Example 5: Deprecated syntax for a right outer join 
SELECT [T2].[c3], [T1].[c3] 
FROM [dbo].[Table2] T2, [dbo].[Table1] T1 
WHERE [T1].[ID] =* [T2].[ID] 

-- Example 6: Fixed syntax for a right outer join 
SELECT [T2].[c3], [T1].[c3] 
FROM [dbo].[Table2] AS T2 
RIGHT OUTER JOIN [dbo].[Table1] as T1 
ON [T2].[ID] = [T2].[ID] 

https://msdn.microsoft.com/en-us/library/dd172122(v=vs.100).aspx