Friday, February 7, 2020

Deleting tables

Dropping Tables

DROP TABLE <tablename>; 
A specific example:
DROP TABLE cats; 
Be careful with this command!
at

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)

Right Joins

-- OUR FIRST RIGHT JOIN (seems the same as a left join?) SELECT * FROM customers RIGHT JOIN orders     ON customers.id = orders.custom...

  • Primary Keys
    CODE: Primary Keys Define a table with a PRIMARY KEY constraint: CREATE TABLE unique_cats ( cat_id INT NOT NULL , name ...
  • Setting Default Values
    CODE: Setting Default Values  Define a table with a DEFAULT name specified: CREATE TABLE cats3 ( name VARCHAR ( 20 ) DEFAUL...
  • Aggregate functions: MIN and MAX
    SELECT MIN ( released_year ) FROM books ;   SELECT MIN ( released_year ) FROM books ;   SELECT MIN ( pages ) FROM books ;   SELE...