转换PLSQL游标FOR循环语法TSQL

Question

我有通过一定的逻辑循环一些PLSQL代码：

FOR I in cur1 
LOOP 

    SELECT value1, value2 
    FROM db1..table1 t1 

END LOOP; 

任何人都可以向我解释的语法在TSQL这样做呢？

Answer 1

这是标准TSQL光标中的通用循环。但尽可能避免使用游标。他们的表现非常糟糕。

DECLARE @somevariable VARIABLE_TYPE_HERE 
DECLARE @sampleCursor CURSOR 

SET @sampleCursor = CURSOR FOR 
SELECT somefield... from bla bla bla... 

OPEN @sampleCursor 
FETCH NEXT 
FROM @sampleCursor INTO @somevariable 
WHILE @@FETCH_STATUS = 0 
BEGIN 

PRINT @somevariable 

FETCH NEXT 
FROM @sampleCursor INTO @somevariable 

END 
CLOSE @sampleCursor 
DEALLOCATE @sampleCursor 

Answer 2

T-SQL中没有FOR。与WHILE一个例子：

DECLARE Employee_Cursor CURSOR FOR 
SELECT EmployeeID, Title 
FROM AdventureWorks2008R2.HumanResources.Employee 

OPEN Employee_Cursor; 

FETCH NEXT FROM Employee_Cursor; 

WHILE @@FETCH_STATUS = 0 
BEGIN 
    FETCH NEXT FROM Employee_Cursor; 
END; 

CLOSE Employee_Cursor; 

DEALLOCATE Employee_Cursor; 

欲了解更多信息：http://msdn.microsoft.com/en-us/library/ms178642.aspx