insert after comparison an entry in sql code example

Example 1: insert a select statement into a table

--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;

Example 2: sql server insert into select

INSERT INTO sales.addresses (street, city, state, zip_code) 
SELECT
    street,
    city,
    state,
    zip_code
FROM
    sales.customers
ORDER BY
    first_name,
    last_name;