Quick Reference
The TABLE keyword is used along with CREATE, ALTER, and DROP to manage a database table.
CREATE TABLE
The following creates a table called Customers that contains six columns: id_customer, first_name, last_name, address, city, state, country.
CREATE TABLE Customers (
id_customer int,
first_name varchar(255),
last_name varchar(255),
address varchar(255),
city varchar(255),
state varchar(255),
country varchar(255)
);
The following creates a new table called “Users” by copying two of the columns from the Customers table.
CREATE TABLE Users AS
SELECT first_name, last_name
FROM Customers;
ALTER TABLE
The following adds the last_name column to the Customers table.
ALTER TABLE Customers
ADD last_name varchar(255);
DROP TABLE
The following deletes the table Customers.
DROP TABLE Customers;
SQL Notes:
- Any work being done to modify the structure of a database or delete tables or the the database itself should only be done after making a recent backup
We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.