Friday, February 7, 2020

Intro to SELECT

SELECT * FROM cats; 
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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...