MySQL INSERT SELECT

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MySQL 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中的数据类型匹配。

注意:目标表中的现有记录不受影响。

INSERT INTO SELECT 语法

将一个表的所有列复制到另一个表:

INSERT INTO table2
SELECT * FROM table1
WHERE condition;

仅将一个表中的一些列复制到另一个表中:

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

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演示数据库

在本教程中，我们将使用著名的 Northwind 示例数据库。

以下是"Customers"表中的选择:

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

从"Suppliers"表中选择:

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

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MySQL INSERT INTO SELECT 示例

以下SQL语句将"Suppliers"复制到"Customers"（未填充数据的列，将包含NULL）:

实例

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

以下 SQL 语句将"Suppliers"复制到"Customers"（填充所有列）:

实例

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

以下 SQL 语句仅将德国供应商复制到"客户"中:

实例

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