SQL INSERT INTO SELECT 语句

INSERT INTO SELECT 语句从一个表中复制数据，并将其插入到另一个表中。

INSERT INTO SELECT 语句要求源表和目标表的数据类型匹配。

注意：目标表中的已有记录不会受到影响。

INSERT INTO SELECT 语法

将一个表的所有列复制到另一个表中：

INSERT INTO table2
SELECT * FROM table1
WHERE condition;

注意：如果省略列名，则源表和目标表中列的数量和顺序必须完全相同！

只将一个表的某些列复制到另一个表中：

INSERT INTO table2 (column1, column2, column3, ...)
SELECT column1, column2, column3, ...
FROM table1
WHERE condition;

演示数据库

以下是 Customers 表中的片段：

CustomerID	CustomerName	ContactName	Address	City	PostalCode	Country
1	Alfreds Futterkiste	Maria Anders	Obere Str. 57	Berlin	12209	Germany
2	Ana Trujillo Emparedados y helados	Ana Trujillo	Avda. de la Constitución 2222	México D.F.	05021	Mexico
3	Antonio Moreno Taquería	Antonio Moreno	Mataderos 2312	México D.F.	05023	Mexico

以及 Suppliers 表中的片段：

SupplierID	SupplierName	ContactName	Address	City	Postal Code	Country
1	Exotic Liquid	Charlotte Cooper	49 Gilbert St.	Londona	EC1 4SD	UK
2	New Orleans Cajun Delights	Shelley Burke	P.O. Box 78934	New Orleans	70117	USA
3	Grandma Kelly's Homestead	Regina Murphy	707 Oxford Rd.	Ann Arbor	48104	USA

SQL INSERT INTO SELECT 实例

实例

将 "Suppliers" 复制到 "Customers"（未填充数据的列将包含 NULL）：

INSERT INTO Customers (CustomerName, City, Country)
SELECT SupplierName, City, Country FROM Suppliers;

实例

将 "Suppliers" 复制到 "Customers"（填充所有列）：

INSERT INTO Customers (CustomerName, ContactName, Address, City, PostalCode, Country)
SELECT SupplierName, ContactName, Address, City, PostalCode, Country FROM Suppliers;

实例

仅将德国供应商复制到 "Customers"：

INSERT INTO Customers (CustomerName, City, Country)
SELECT SupplierName, City, Country FROM Suppliers
WHERE Country='Germany';