-- Add column
ALTER TABLE <table_name> IF EXISTS
ADD <column_name> <data_type> [<constraints>];

-- Update column
ALTER TABLE <table_name> IF EXISTS
ALTER <column_name> TYPE <data_type> [<constraints>];

-- Delete column
ALTER TABLE <table_name> IF EXISTS
DROP <column_name>;

-- Update column to be an auto-incrementing primary key
ALTER TABLE <table_name>
ADD COLUMN <column_name> SERIAL PRIMARY KEY;

-- Insert into a table, with an auto-incrementing primary key
INSERT INTO <table_name>
VALUES (DEFAULT, <value1>);
--
INSERT INTO <table_name> (<column1_name>,<column2_name>)
VALUES ( <value1>,<value2> );