--format
INSERT INTO Customers (CustomerName, City, Country)
SELECT SupplierName, City, Country FROM Suppliers;
--examples
INSERT INTO Customers (CustomerName, City, Country)
SELECT SupplierName, City, Country FROM Suppliers;
INSERT INTO my_table SELECT * FROM source_table;
INSERT INTO my_table (a, b, c) SELECT a, b, c FROM source_table;
INSERT INTO my_table (a, b, c) SELECT a, b, c FROM source_table s
WHERE s.my_col >= 10;