SQL 语句 INSERT INTO SELECT 从一个表复制数据并将其插入到另一表中。
INSERT INTO SELECT 语句要求源表和目标表中的数据类型匹配。
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
仅将某些列从一个表复制到另一个表:
INSERT INTO table2 (column1, column2, column3, ...)
SELECT column1, column2, column3, ...
FROM table1
WHERE condition
在本教程中,我们将使用著名的示例数据库“Northwind”。
以下是表“Customers”(“客户”)中的示例:
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. | 5021 | Mexico |
3 | Antonio Moreno Taquería | Antonio Moreno | Mataderos 2312 | México D.F. | 5023 | Mexico |
4 | Around the Horn | Thomas Hardy | 120 Hanover Sq. | London | WA1 1DP | UK |
5 | Berglunds snabbköp | Christina Berglund | Berguvsvägen 8 | Luleå | S-958 22 | Sweden |
以及表“Suppliers”(“供应商”)中的示例:
SupplierID | SupplierName | ContactName | Address | City | PostalCode | Country | Phone |
---|---|---|---|---|---|---|---|
1 | Exotic Liquid | Charlotte Cooper | 49 Gilbert St. | Londona | EC1 4SD | UK | (171) 555-2222 |
2 | New Orleans Cajun Delights | Shelley Burke | P.O. Box 78934 | New Orleans | 70117 | USA | (100) 555-4822 |
3 | Grandma Kelly's Homestead | Regina Murphy | 707 Oxford Rd. | Ann Arbor | 48104 | USA | (313) 555-5735 |
4 | Tokyo Traders | Yoshi Nagase | 9-8 Sekimai Musashino-shi | Tokyo | 100 | Japan | (03) 3555-5011 |
5 | Cooperativa de Quesos 'Las Cabras' | Antonio del Valle Saavedra | Calle del Rosal 4 | Oviedo | 33007 | Spain | (98) 598 76 54 |
以下 SQL 查询将“Suppliers”(“供应商”)复制到“Customers”(“客户”)(未填充数据的列将包含 NULL):
INSERT INTO Customers (CustomerName, City, Country)
SELECT SupplierName, City, Country
FROM Suppliers
SQL 查询的另一个版本将数据从“Suppliers”表复制到“Customers”(填充所有列):
INSERT INTO Customers (CustomerName, ContactName, Address, City, PostalCode, Country)
SELECT SupplierName, ContactName, Address, City, PostalCode, Country
FROM Suppliers
以下 SQL 语句仅将德国供应商复制到 Customers 表中:
INSERT INTO Customers (CustomerName, City, Country)
SELECT SupplierName, City, Country
FROM Suppliers
WHERE Country = 'Germany'