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MySQL 教程

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MySQL INSERT INTO SELECT 语句


MySQL INSERT INTO SELECT 语句

The INSERT INTO SELECT 语句将数据从一个表复制到另一个表。

The INSERT INTO SELECT 语句要求源表和目标表的 数据类型 匹配。

注意: 目标表中现有的记录不受影响。

INSERT INTO SELECT 语法

将一个表中的所有列复制到另一个表中

INSERT INTO table2
SELECT * FROM table1
WHERE condition;

将一个表中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

在本教程中,我们将使用众所周知的 Northwind 示例数据库。

以下是 "Customers" 表中的一个选择

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

还有 "Suppliers" 表中的一个选择

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


MySQL INSERT INTO SELECT 示例

以下 SQL 语句将 "Suppliers" 复制到 "Customers" 中(没有填充数据的列将包含 NULL)

示例

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

以下 SQL 语句将 "Suppliers" 表的内容复制到 "Customers" 表中(填充所有列)

示例

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

以下 SQL 语句将仅将德国供应商的信息复制到 "Customers" 表中

示例

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

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