T-SQL:批GO使用实例（十四）

PRINT ‘第一批‘;GO
-- Invalid batch
PRINT ‘第二批‘;
SELECT custid FROM Sales.Customers;
SELECT orderid FOM Sales.Orders;
GO
-- Valid batch
PRINT ‘第三批‘;
SELECT empid FROM HR.Employees;

DECLARE @i AS INT = 10;
-- Succeeds
PRINT @i;
GO

-- Fails
PRINT @i;
GO

IF OBJECT_ID(‘Sales.MyView‘, ‘V‘) IS NOT NULL DROP VIEW Sales.MyView;

CREATE VIEW Sales.MyView
AS

SELECT YEAR(orderdate) AS orderyear, COUNT(*) AS numorders
FROM Sales.Orders
GROUP BY YEAR(orderdate);
GO

CREATE TABLE dbo.T1(col1 INT);
GO

-- Following fails
ALTER TABLE dbo.T1 ADD col2 INT;
SELECT col1, col2 FROM dbo.T1;
GO

print ‘1123‘
GO 5