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jpotts18/create_dates.sql

Last active August 29, 2023 19:49
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Date Dimension for Postgres
Raw
create_dates.sql
CREATE TABLE public.dates (
id int4 NOT NULL PRIMARY KEY,
date date NOT NULL,
datetime timestamp NOT NULL,
julian_day int4 NOT NULL,
day int4 NOT NULL,
day_name varchar NOT NULL,
day_abbrev varchar NOT NULL,
year int4 NOT NULL,
year_name varchar NOT NULL,
year_abbrev varchar NOT NULL,
year_begins_on date NOT NULL,
year_ends_on date NOT NULL,
is_end_of_year bool, -- These need to be NULL on CREATE and they are populated on UPDATE
is_leap_year bool,
days_in_year int2,
quarter int4 NOT NULL,
quarter_name varchar NOT NULL,
quarter_abbrev varchar NOT NULL,
quarter_begins_on date NOT NULL,
quarter_ends_on date NOT NULL,
is_end_of_quarter bool,
days_in_quarter int2,
month int2 NOT NULL,
month_name varchar NOT NULL,
month_abbrev varchar NOT NULL,
month_begins_on date NOT NULL,
month_ends_on date NOT NULL,
is_end_of_month bool,
days_in_month int2,
week_of_year int2 NOT NULL,
week_of_year_name varchar NOT NULL,
week_of_year_abbrev varchar NOT NULL,
week_of_year_begins_on date NOT NULL,
week_of_year_ends_on date NOT NULL,
is_end_of_week_of_year bool,
days_in_week_of_year int2,
week_of_month int2 NOT NULL,
week_of_month_name varchar NOT NULL,
week_of_month_abbrev varchar NOT NULL,
week_of_month_begins_on date NOT NULL,
week_of_month_ends_on date NOT NULL,
is_end_of_week_of_month bool,
days_in_week_of_month int2,
day_of_year int2 NOT NULL,
day_of_year_name varchar NOT NULL,
day_of_year_abbrev varchar NOT NULL,
day_of_month int2 NOT NULL,
day_of_month_name varchar NOT NULL,
day_of_month_abbrev varchar NOT NULL,
day_of_week int2 NOT NULL,
day_of_week_name varchar NOT NULL,
day_of_week_abbrev varchar NOT NULL,
weekday_weekend varchar NOT NULL
)
WITH (OIDS=FALSE);
Raw
generate_dates.sql
TRUNCATE TABLE dates;
INSERT INTO dates VALUES (
-1, -- id
'1/1/1800', -- date
'1/1/1800', -- datetime
0, -- julian_day
0, -- day
'Unknown', -- day_name
'Unk', -- day_abbrev
0, -- year
'Unknown', -- year_name
'Unk', -- year_abbrev
'1/1/1800', -- year_begins_on
'1/1/1800', -- year_ends_on
false, -- is_end_of_year
false, -- is_leap_year
0, -- days_in_year
0, -- quarter
'Unknown', -- quarter_name
'Unk', -- quarter_abbrev
'1/1/1800', -- quarter_begins_on
'1/1/1800', -- quarter_ends_on
false, -- is_end_of_quarter
0, -- days_in_quarter
0, -- month
'Unknown', -- month_name
'Unk', -- month_abbrev
'1/1/1800', -- month_begins_on
'1/1/1800', -- month_ends_on
false, -- is_end_of_month
0, -- days_in_month
0, -- week_of_year
'Unknown', -- week_of_year_name
'Unk', -- week_of_year_abbrev
'1/1/1800', -- week_of_year_ends_on
'1/1/1800', -- week_of_year_begins_on
false, -- is_end_of_week_of_year
0, -- days_in_week_of_year
0, -- week_of_month
'Unknown', -- week_of_month_name
'Unk', -- week_of_month_name_abbrev
'1/1/1800', -- week_of_month_begins_on
'1/1/1800', -- week_of_month_ends_on
false, -- is_end_of_week_of_monfth
0, -- days_in_week_of_month
0, -- day_of_year
'Unknown', -- day_of_year_name
'Unk', -- day_of_year_abbrev
0, -- day_of_month
'Unknown', --day_of_month_name
'Unk', -- day_of_month_abbrev
0, -- day_of_week
'Unknown', -- day_of_week_name
'Unk', -- day_of_week_abbrev
'Unknown' -- weekday_weekend
);
INSERT INTO dates
SELECT
to_char(day, 'YYYYMMDD')::integer AS id,
day::date AS date,
day::timestamp AS datetime,
to_char(day, 'J')::integer AS julian_day,
to_char(day, 'YYYYMMDD')::integer AS day,
to_char(day, 'DD TMMonth YYYY') AS day_name,
to_char(day, 'MM/DD/YY') AS day_abbrev,
extract(year FROM day)::integer AS year,
to_char(day, 'YYYY') AS year_name,
to_char(day, 'YY') AS year_abbrev,
date_trunc('year', day)::date AS year_begins_on,
(date_trunc('year', day)::date + '1 year - 1 day'::interval)::date AS year_ends_on,
null AS is_end_of_year,
null AS days_in_year,
null AS is_leap_year,
extract(quarter FROM day)::integer AS quarter,
to_char(day, 'Qth') || ' Quarter' AS quarter_name,
to_char(day, '"Q"Q') AS quarter_abbrev,
date_trunc('quarter', day)::date AS quarter_begins_on,
(date_trunc('quarter', day)::date + '3 months - 1 day'::interval)::date AS quarter_ends_on,
null AS is_end_of_quarter,
null AS days_in_quarter,
extract(month FROM day)::integer AS month,
to_char(day, 'TMMonth') AS month_name,
to_char(day, 'TMMon') AS month_abbrev,
date_trunc('month', day)::date AS month_begins_on,
(date_trunc('month', day)::date + '1 month - 1 day'::interval)::date AS month_ends_on,
null AS is_end_of_month,
null AS days_in_month,
to_char(day, 'WW')::integer AS week_of_year,
to_char(day, '"Week "WW') AS week_of_year_name,
to_char(day, '"W"WW') AS week_of_year_abbrev,
date_trunc('week', day)::date AS week_of_year_begins_on,
(date_trunc('week', day)::date + '1 week - 1 day'::interval)::date AS week_of_year_ends_on,
null AS is_end_of_week_of_year,
null AS days_in_week_of_year,
to_char(day, 'W')::integer AS week_of_month,
to_char(day, '"Week "W') AS week_of_month_name,
to_char(day, '"W"W') AS week_of_month_abbrev,
date_trunc('week', day)::date AS week_of_month_begins_on,
(date_trunc('week', day)::date + '1 week - 1 day'::interval)::date AS week_of_month_ends_on,
null AS is_end_of_week_of_month,
null AS days_in_week_of_month,
extract(doy FROM day)::integer AS day_of_year,
to_char(day, 'DD TMMonth YYYY') AS day_of_year_name,
to_char(day, 'MM/DD/YY') AS day_of_year_abbrev,
extract(day FROM day)::integer AS day_of_month,
to_char(day, 'TMDay') AS day_of_month_name,
to_char(day, 'TMDy') AS day_of_month_abbrev,
to_char(day, 'D')::integer AS day_of_week,
to_char(day, 'TMDay') AS day_of_week_name,
to_char(day, 'TMDy') AS day_of_week_abbrev,
CASE WHEN extract(isodow FROM day) IN (6, 7) THEN 'Weekend' ELSE 'Weekday' END AS weekday_weekend
FROM generate_series('2015-01-01'::date, '2017-01-01'::date, '1 day') day;
UPDATE dates
SET is_end_of_year = (date = year_ends_on),
days_in_year = (year_ends_on - year_begins_on) + 1,
is_leap_year = (year % 4 = 0) AND ((year % 100 != 0) OR (year % 400 = 0)),
is_end_of_quarter = (date = quarter_ends_on),
days_in_quarter = (quarter_ends_on - quarter_begins_on) + 1,
is_end_of_month = (date = month_ends_on),
days_in_month = (month_ends_on - month_begins_on) + 1,
is_end_of_week_of_year = (date = week_of_year_ends_on),
days_in_week_of_year = (week_of_year_ends_on - week_of_year_begins_on) + 1
WHERE id > 0;
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