SQL SELECT INTO 語句
通過 SQL，您可以從一個表復制信息到另一個表。
SELECT INTO 語句從一個表復制數據，然后把數據插入到另一個新表中。
SQL SELECT INTO 語句
SELECT INTO 語句從一個表復制數據，然后把數據插入到另一個新表中。
SQL SELECT INTO 語法
我們可以復制所有的列插入到新表中：
SELECT *
INTO newtable [IN externaldb]
FROM table1;
INTO newtable [IN externaldb]
FROM table1;
或者只復制希望的列插入到新表中：
SELECT column_name(s)
INTO newtable [IN externaldb]
FROM table1;
INTO newtable [IN externaldb]
FROM table1;
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提示：新表將會使用 SELECT 語句中定義的列名稱和類型進行創建。您可以使用 AS 子句來應用新名稱。 |
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SQL SELECT INTO 實例
創建 Customers 的備份復件：
SELECT *
INTO CustomersBackup2013
FROM Customers;
INTO CustomersBackup2013
FROM Customers;
請使用 IN 子句來復制表到另一個數據庫中：
SELECT *
INTO CustomersBackup2013 IN 'Backup.mdb'
FROM Customers;
INTO CustomersBackup2013 IN 'Backup.mdb'
FROM Customers;
只復制一些列插入到新表中：
SELECT CustomerName,
ContactName
INTO CustomersBackup2013
FROM Customers;
INTO CustomersBackup2013
FROM Customers;
只復制德國的客戶插入到新表中：
SELECT *
INTO CustomersBackup2013
FROM Customers
WHERE Country='Germany';
INTO CustomersBackup2013
FROM Customers
WHERE Country='Germany';
復制多個表中的數據插入到新表中：
SELECT Customers.CustomerName, Orders.OrderID
INTO CustomersOrderBackup2013
FROM Customers
LEFT JOIN Orders
ON Customers.CustomerID=Orders.CustomerID;
INTO CustomersOrderBackup2013
FROM Customers
LEFT JOIN Orders
ON Customers.CustomerID=Orders.CustomerID;
提示：SELECT INTO 語句可用于通過另一種模式創建一個新的空表。只需要添加促使查詢沒有數據返回的 WHERE 子句即可：
SELECT *
INTO newtable
FROM table1
WHERE 1=0;
INTO newtable
FROM table1
WHERE 1=0;
