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26 December, 2020

The SQL INSERT INTO SELECT Statement

 Programing Coderfunda     December 26, 2020     SQL Tutorial     No comments   

The SQL INSERT INTO SELECT Statement

The INSERT INTO SELECT statement copies data from one table and inserts it into another table.

  • INSERT INTO SELECT requires that data types in source and target tables match
  • The existing records in the target table are unaffected

INSERT INTO SELECT Syntax

Copy all columns from one table to another table:

INSERT INTO table2
SELECT * FROM table1
WHERE condition;

Copy only some columns from one table into another table:

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

Demo Database

In this tutorial we will use the well-known Northwind sample database.

Below is a selection from the "Customers" table:

CustomerIDCustomerNameContactNameAddressCityPostalCodeCountry
1

Alfreds FutterkisteMaria AndersObere Str. 57Berlin12209Germany
2Ana Trujillo Emparedados y heladosAna TrujilloAvda. de la Constitución 2222México D.F.05021Mexico
3Antonio Moreno TaqueríaAntonio MorenoMataderos 2312México D.F.05023Mexico

And a selection from the "Suppliers" table:

SupplierIDSupplierNameContactNameAddressCityPostal CodeCountry
1Exotic LiquidCharlotte Cooper49 Gilbert St.LondonaEC1 4SDUK
2New Orleans Cajun DelightsShelley BurkeP.O. Box 78934New Orleans70117USA
3Grandma Kelly's HomesteadRegina Murphy707 Oxford Rd.Ann Arbor48104USA
1

SQL INSERT INTO SELECT Examples

The following SQL statement copies "Suppliers" into "Customers" (the columns that are not filled with data, will contain NULL):

Example

INSERT INTO Customers (CustomerName, City, Country)
SELECT SupplierName, City, Country FROM Suppliers;
Try it Yourself »

The following SQL statement copies "Suppliers" into "Customers" (fill all columns):

Example

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

The following SQL statement copies only the German suppliers into "Customers":

Example

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

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