Table creation
Table creation
You are encouraged to solve this task according to the task description, using any language you may know.
You are encouraged to solve this task according to the task description, using any language you may know.
In this task, the goal is to create a table to exemplify most commonly used data types and options.
PostgreSQL
-- This is a comment CREATE SEQUENCE account_seq start 100; CREATE TABLE account ( account_id int4 PRIMARY KEY DEFAULT nextval('account_seq'), created date not null default now(), active bool not null default 't', username varchar(16) unique not null, balance float default 0, age int2, notes text ); CREATE TABLE account_note ( account_id int4 not null REFERENCES account, created timestamp not null default now(), note text not null, unique(account_id, note) );
bool: 't', 'f' or NULL int2: -32768 to +32767 int4: -2147483648 to +2147483647 float: decimal date: obvious timestamp: date time char(#): space padded text field with length of # varchar(#): variable length text field up to # text: not limited