{"id":458688,"date":"2025-05-06T03:00:29","date_gmt":"2025-05-06T03:00:29","guid":{"rendered":"http:\/\/savepearlharbor.com\/?p=458688"},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-29T21:00:00","slug":"","status":"publish","type":"post","link":"https:\/\/savepearlharbor.com\/?p=458688","title":{"rendered":"\u0417\u0430\u043f\u043b\u0430\u0442\u043a\u0438 \u0434\u043b\u044f LAG\/LEAD<\/span>"},"content":{"rendered":"
<\/div>\n
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\n
\n

\u041f\u0440\u0438\u0432\u0435\u0442, \u0425\u0430\u0431\u0440.<\/p>\n

\u0421\u0435\u0433\u043e\u0434\u043d\u044f \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0438\u043c, \u043a\u0430\u043a \u0440\u0430\u0437\u0440\u0435\u0436\u0435\u043d\u043d\u044b\u0439 \u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 \u0440\u044f\u0434 \u043b\u043e\u043c\u0430\u0435\u0442 \u043e\u043a\u043e\u043d\u043d\u044b\u0435 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 (LAG<\/code>, LEAD<\/code>, SUM OVER<\/code> \u0438 \u0434\u0440.), \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0438\u043c \u043a\u0430\u043a \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u044c \u0434\u044b\u0440\u044b \u0438 \u0437\u0430\u043f\u043e\u043b\u043d\u044f\u0442\u044c \u0438\u0445, \u0447\u0442\u043e\u0431\u044b \u043c\u0435\u0442\u0440\u0438\u043a\u0438 \u043d\u0435 \u0441\u044b\u043f\u0430\u043b\u0438\u0441\u044c \u0438 \u0441\u0442\u0440\u043e\u043a\u0438 \u043d\u0435 \u0434\u0443\u0431\u043b\u0438\u0440\u043e\u0432\u0430\u043b\u0438\u0441\u044c.<\/p>\n

\u041e\u043a\u043e\u043d\u043d\u044b\u0435 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 \u0438 \u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u043e\u043b\u043d\u043e\u0442\u044b \u0434\u0430\u043d\u043d\u044b\u0445<\/h3>\n

LAG<\/code>, LEAD<\/code>, SUM() OVER (\u2026)<\/code>, ROW_NUMBER()<\/code> \u0440\u0430\u0441\u0441\u0447\u0438\u0442\u044b\u0432\u0430\u044e\u0442\u0441\u044f \u043f\u043e\u0432\u0435\u0440\u0445 \u0443\u043f\u043e\u0440\u044f\u0434\u043e\u0447\u0435\u043d\u043d\u043e\u0439 \u0438 \u043d\u0435\u043f\u0440\u0435\u0440\u044b\u0432\u043d\u043e\u0439<\/strong> \u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0441\u0442\u0440\u043e\u043a. \u0415\u0441\u043b\u0438 \u043c\u0435\u0436\u0434\u0443 \u0434\u0430\u0442\u0430\u043c\u0438 \u0432\u043e\u0437\u043d\u0438\u043a\u0430\u0435\u0442 \u043f\u0440\u043e\u0431\u0435\u043b, \u043d\u0443\u0436\u043d\u043e\u0439 \u0441\u0442\u0440\u043e\u043a\u0438 \u043d\u0435\u0442 \u0432 \u0431\u0443\u0444\u0435\u0440\u0435, \u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u044f \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 NULL<\/code>. \u0421\u0442\u0430\u043d\u0434\u0430\u0440\u0442 SQL \u0434\u043e\u043f\u0443\u0441\u043a\u0430\u0435\u0442 \u0434\u0438\u0440\u0435\u043a\u0442\u0438\u0432\u0443 IGNORE NULLS<\/code>, \u043e\u0434\u043d\u0430\u043a\u043e \u0432 PostgreSQL \u043e\u043d\u0430 \u043f\u043e\u043a\u0430 \u043d\u0435 \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u0430 , \u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e, \u043b\u044e\u0431\u0430\u044f \u0434\u044b\u0440\u0430 \u0432 \u043a\u0430\u043b\u0435\u043d\u0434\u0430\u0440\u0435 \u043d\u0435\u043c\u0435\u0434\u043b\u0435\u043d\u043d\u043e \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0435.<\/p>\n

\u041f\u0440\u0438\u043c\u0435\u0440:<\/p>\n

WITH daily_balance AS (   SELECT * FROM (VALUES     ('2025-04-20'::date, 100),     ('2025-04-22',        150) -- \u043f\u0440\u043e\u043f\u0443\u0449\u0435\u043d\u043e 21-\u0435   ) AS t(trn_date, balance) ) SELECT   trn_date,   balance,   balance - LAG(balance) OVER (ORDER BY trn_date) AS diff FROM daily_balance;<\/code><\/pre>\n
\u041f\u043e\u043b\u0435 diff<\/code> \u0437\u0430 22 \u0430\u043f\u0440\u0435\u043b\u044f \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u0442 NULL<\/code>, \u0445\u043e\u0442\u044f \u043f\u0440\u0438 \u043d\u0435\u043f\u0440\u0435\u0440\u044b\u0432\u043d\u043e\u043c \u0440\u044f\u0434\u0435 \u043e\u0436\u0438\u0434\u0430\u043b\u043e\u0441\u044c +50.<\/p>\n
\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u043f\u0440\u043e\u043f\u0443\u0441\u043a\u043e\u0432<\/h3>\n
\n
\n\n\n\n\n\n\n
\n
\u0417\u0430\u0442\u0440\u043e\u043d\u0443\u0442\u0430\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u044f<\/p>\n<\/th>\n
\n
\u041d\u0430\u0431\u043b\u044e\u0434\u0430\u0435\u043c\u043e\u0435 \u043f\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u0435<\/p>\n<\/th>\n
\n
\u0420\u0438\u0441\u043a<\/p>\n<\/th>\n<\/tr>\n
\n
LAG<\/code>, LEAD<\/code><\/p>\n<\/td>\n
\n
NULL<\/code> \u0432\u043c\u0435\u0441\u0442\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f<\/p>\n<\/td>\n
\n
\u0426\u0435\u043f\u043e\u0447\u043a\u0438 NULL<\/code> \u0438\u0441\u043a\u0430\u0436\u0430\u044e\u0442 \u0441\u0440\u0430\u0432\u043d\u0435\u043d\u0438\u0435 \u043f\u0435\u0440\u0438\u043e\u0434\u043e\u0432<\/p>\n<\/td>\n<\/tr>\n
\n
SUM() OVER<\/code><\/p>\n<\/td>\n
\n
\u041f\u0440\u0435\u0440\u044b\u0432\u0438\u0441\u0442\u0430\u044f \u043a\u0443\u043c\u0443\u043b\u044f\u0442\u0438\u0432\u043d\u0430\u044f \u043b\u0438\u043d\u0438\u044f<\/p>\n<\/td>\n
\n
\u0422\u0440\u0435\u043d\u0434 \u0432\u0438\u0437\u0443\u0430\u043b\u044c\u043d\u043e \u043f\u0440\u043e\u0441\u0435\u0434\u0430\u0435\u0442<\/p>\n<\/td>\n<\/tr>\n
\n
ROW_NUMBER<\/code>, RANK<\/code><\/p>\n<\/td>\n
\n
\u041d\u0435\u043f\u0440\u0435\u0434\u0441\u043a\u0430\u0437\u0443\u0435\u043c\u044b\u0435 \u0440\u0430\u0437\u0440\u044b\u0432\u044b \u043d\u0443\u043c\u0435\u0440\u0430\u0446\u0438\u0438<\/p>\n<\/td>\n
\n
\u0421\u043b\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0438\u043d\u0442\u0435\u0440\u043f\u0440\u0435\u0442\u0430\u0446\u0438\u0438 \u043f\u043e\u0437\u0438\u0446\u0438\u0438 \u0432 \u0440\u044f\u0434\u0430\u0445<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\u0414\u0438\u0430\u0433\u043d\u043e\u0441\u0442\u0438\u043a\u0430 \u043d\u0435\u043f\u043e\u043b\u043d\u043e\u0433\u043e \u043a\u0430\u043b\u0435\u043d\u0434\u0430\u0440\u044f<\/h3>\n
\u0425\u043e\u0440\u043e\u0448\u0438\u0439 \u043c\u0435\u0442\u043e\u0434 \u2014 \u0441\u0433\u0435\u043d\u0435\u0440\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u044d\u0442\u0430\u043b\u043e\u043d\u043d\u044b\u0439 \u043a\u0430\u043b\u0435\u043d\u0434\u0430\u0440\u044c \u0447\u0435\u0440\u0435\u0437 generate_series<\/code> \u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u0430\u043d\u0442\u0438-\u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435<\/strong> (anti-join):<\/p>\n
WITH calendar AS (   SELECT gs::date AS d   FROM   generate_series('2025-04-01','2025-04-30','1 day') AS gs ), gaps AS (   SELECT c.d   FROM   calendar c   LEFT   JOIN daily_balance b ON b.trn_date = c.d   WHERE  b.trn_date IS NULL ) SELECT d FROM gaps ORDER BY d;<\/code><\/pre>\n
\u0420\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u2014 \u0441\u0442\u0440\u043e\u0433\u0438\u0439 \u0441\u043f\u0438\u0441\u043e\u043a \u043f\u043e\u0442\u0435\u0440\u044f\u043d\u043d\u044b\u0445 \u0434\u0430\u0442, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043c\u043e\u0436\u043d\u043e \u043e\u0442\u043f\u0440\u0430\u0432\u043b\u044f\u0442\u044c \u0432 \u043c\u043e\u043d\u0438\u0442\u043e\u0440\u0438\u043d\u0433.<\/p>\n
\u0421\u0442\u0440\u0430\u0442\u0435\u0433\u0438\u0438 \u0437\u0430\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u043c\u0435\u0436\u0443\u0442\u043a\u043e\u0432<\/h3>\n
generate_series + LEFT JOIN<\/h4>\n
\u0415\u0436\u0435\u0434\u043d\u0435\u0432\u043d\u0430\u044f \u0441\u0435\u0442\u043a\u0430<\/strong> \u2014 \u043f\u0440\u043e\u0441\u0442\u043e\u0435 \u0432\u044b\u0440\u0430\u0432\u043d\u0438\u0432\u0430\u043d\u0438\u0435 \u0431\u0430\u043b\u0430\u043d\u0441\u0430.<\/p>\n
WITH calendar AS (   SELECT gs::date AS d   FROM   generate_series('2025-04-01', '2025-04-30', '1 day') gs ) SELECT   c.d,   COALESCE(b.balance, 0) AS balance FROM calendar c LEFT JOIN daily_balance b USING (d) ORDER BY c.d;<\/code><\/pre>\n
\u0421\u0434\u0432\u0438\u0433\u043e\u043c \u043d\u0430 \u043c\u0435\u0441\u044f\u0446<\/strong> \u2014 \u043a\u0443\u043c\u0443\u043b\u044f\u0442\u0438\u0432 \u043f\u043e \u043c\u0435\u0441\u044f\u0446\u0430\u043c \u0431\u0435\u0437 \u0434\u044b\u0440:<\/p>\n
WITH months AS (   SELECT date_trunc('month', gs)::date AS month   FROM   generate_series('2024-01-01', '2024-12-01', '1 month') gs ), m_balance AS (   SELECT date_trunc('month', trn_date) AS month,          SUM(amount) AS gmv   FROM   payments   GROUP  BY 1 ) SELECT m.month,        COALESCE(gmv, 0)                                              AS gmv,        SUM(COALESCE(gmv,0)) OVER (ORDER BY m.month)                  AS gmv_cum FROM   months m LEFT   JOIN m_balance USING (month) ORDER  BY m.month;<\/code><\/pre>\n
\u0418\u043d\u0434\u0435\u043a\u0441\u0430\u0446\u0438\u044f: CREATE INDEX ON payments (date_trunc('month', trn_date));<\/code><\/p>\n
\u041f\u043e\u0441\u0442\u043e\u044f\u043d\u043d\u0430\u044f \u0442\u0430\u0431\u043b\u0438\u0446\u0430 dim_date<\/h4>\n
-- \u041e\u0434\u043d\u043e\u043a\u0440\u0430\u0442\u043d\u043e\u0435 \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u0435 CREATE TABLE dim_date AS SELECT gs::date                        AS day,        date_trunc('week',  gs)::date   AS week_start,        date_trunc('month', gs)::date   AS month_start FROM   generate_series('2010-01-01','2030-12-31','1 day') gs;  ALTER TABLE dim_date ADD PRIMARY KEY (day); CREATE INDEX ON dim_date (month_start); <\/code><\/pre>\n
\u041d\u043e\u0447\u043d\u043e\u0439 \u043a\u0440\u043e\u043d-\u0430\u043f\u0434\u0435\u0439\u0442 (\u043f\u0440\u0438\u043c\u0435\u0440 \u043d\u0430 psql + cron):<\/strong><\/p>\n
psql -c \" INSERT INTO dim_date SELECT gs::date, date_trunc('week', gs), date_trunc('month', gs) FROM generate_series(         (SELECT max(day)+1 FROM dim_date),         current_date,         '1 day') gs ON CONFLICT (day) DO NOTHING;\"<\/code><\/pre>\n
\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0432\u043e \u0432\u0441\u0435\u0445 \u043e\u0442\u0447\u0451\u0442\u0430\u0445:<\/p>\n
SELECT d.day, COALESCE(p.gmv,0) AS gmv FROM   dim_date d LEFT   JOIN payment_agg p ON p.trn_date = d.day WHERE  d.day BETWEEN '2025-01-01' AND '2025-01-31';<\/code><\/pre>\n
\u041f\u043b\u0430\u043d\u0438\u0440\u043e\u0432\u0449\u0438\u043a \u0431\u043e\u043b\u044c\u0448\u0435 \u043d\u0435 \u0441\u0447\u0438\u0442\u0430\u0435\u0442 generate_series<\/code>, \u0438\u043d\u0434\u0435\u043a\u0441\u044b \u0433\u043e\u0442\u043e\u0432\u044b \u0437\u0430\u0440\u0430\u043d\u0435\u0435.<\/p>\n
LATERAL-\u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 \u0434\u043b\u044f \u043c\u0435\u043b\u043a\u0438\u0445 \u0438\u043d\u0442\u0435\u0440\u0432\u0430\u043b\u043e\u0432<\/h4>\n
\u0417\u0430\u0434\u0430\u0447\u0430:<\/strong> \u043f\u0440\u043e\u0432\u0435\u0440\u0438\u0442\u044c, \u0431\u044b\u043b \u043b\u0438 \u0442\u0440\u0430\u0444\u0438\u043a \u0432 \u043a\u0430\u0436\u0434\u043e\u043c 10-\u043c\u0438\u043d\u0443\u0442\u043d\u043e\u043c \u043e\u043a\u043d\u0435.<\/p>\n
WITH slots AS (   SELECT gs AS slot_start,          gs + interval '10 minutes' AS slot_end   FROM generate_series(          '2025-04-10 00:00',          '2025-04-10 23:50',          '10 minutes'        ) gs ) SELECT   s.slot_start,   COALESCE(t.hits, 0) AS hits FROM   slots s LEFT   JOIN LATERAL (          SELECT COUNT(*) AS hits          FROM   web_log w          WHERE  w.event_ts >= s.slot_start            AND  w.event_ts <  s.slot_end        ) t ON TRUE ORDER  BY s.slot_start;<\/code><\/pre>\n
\u041e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e: CREATE INDEX ON web_log (event_ts);.<\/code> LATERAL \u0434\u0430\u0451\u0442 \u043e\u0434\u0438\u043d \u0438\u043d\u0434\u0435\u043a\u0441-lookup \u043d\u0430 \u043e\u043a\u043d\u043e \u0432\u043c\u0435\u0441\u0442\u043e \u0434\u0436\u043e\u0439\u043d\u0430 \u00ab\u043c\u043d\u043e\u0433\u0438\u0435-\u043a-\u043c\u043d\u043e\u0433\u0438\u043c\u00bb.<\/p>\n
\u0427\u0435\u043a-\u043b\u0438\u0441\u0442:<\/p>\n
\n
\n\n\n\n\n\n\n
\n
\u041f\u0440\u0438\u0451\u043c<\/p>\n<\/th>\n
\n
\u041a\u043e\u0433\u0434\u0430 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0442\u044c<\/p>\n<\/th>\n
\n
\u041a\u043b\u044e\u0447\u0435\u0432\u043e\u0439 \u0438\u043d\u0434\u0435\u043a\u0441<\/p>\n<\/th>\n<\/tr>\n
\n
generate_series<\/code> + LEFT JOIN<\/code><\/p>\n<\/td>\n
\n
\u0431\u044b\u0441\u0442\u0440\u044b\u0435 \u043e\u0434\u043d\u043e\u0440\u0430\u0437\u043e\u0432\u044b\u0435 \u0440\u0430\u0437\u0432\u0435\u0440\u0442\u043a\u0438<\/p>\n<\/td>\n
\n
\u043d\u0435 \u043d\u0443\u0436\u0435\u043d<\/p>\n<\/td>\n<\/tr>\n
\n
dim_date<\/code><\/p>\n<\/td>\n
\n
\u043f\u043e\u0432\u0441\u0435\u0434\u043d\u0435\u0432\u043d\u044b\u0435 \u043e\u0442\u0447\u0451\u0442\u044b, BI<\/p>\n<\/td>\n
\n
PK(day), (month_start)<\/p>\n<\/td>\n<\/tr>\n
\n
LATERAL<\/code> \u043d\u0430 generate_series<\/code><\/p>\n<\/td>\n
\n
\u0438\u043d\u0442\u0435\u0440\u0432\u0430\u043b\u044b < 1 \u0447, \u043d\u0435\u0440\u0430\u0432\u043d\u044b\u0435 \u0448\u0430\u0433\u0438<\/p>\n<\/td>\n
\n
(timestamp)<\/code><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0439\u0442\u0435 \u043d\u0443\u0436\u043d\u044b\u0439 \u0448\u0430\u0431\u043b\u043e\u043d \u2014 \u0438 \u043d\u0438 \u043e\u0434\u0438\u043d \u043f\u0440\u043e\u043f\u0443\u0441\u043a \u0431\u043e\u043b\u044c\u0448\u0435 \u043d\u0435 \u0438\u0441\u043f\u043e\u0440\u0442\u0438\u0442 \u0430\u0433\u0440\u0435\u0433\u0430\u0442\u044b.<\/p>\n
\u041f\u0440\u0435\u0434\u043e\u0442\u0432\u0440\u0430\u0449\u0435\u043d\u0438\u0435 \u043f\u043e\u0432\u0442\u043e\u0440\u043d\u043e\u0433\u043e \u0441\u0447\u0451\u0442\u0430<\/h3>\n
\u041a\u0430\u043b\u0435\u043d\u0434\u0430\u0440\u044c \u0443\u043c\u043d\u043e\u0436\u0435\u043d\u043d\u044b\u0439 \u043d\u0430 \u0444\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0434\u0430\u043d\u043d\u044b\u0435 = \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0435 \u0443\u043c\u043d\u043e\u0436\u0435\u043d\u0438\u0435 \u0441\u0442\u0440\u043e\u043a, \u0435\u0441\u043b\u0438 \u043d\u0430 \u0434\u0430\u0442\u0443 \u043f\u0440\u0438\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u0431\u043e\u043b\u0435\u0435 \u043e\u0434\u043d\u043e\u0439 \u0437\u0430\u043f\u0438\u0441\u0438. \u0418\u0437\u0431\u044b\u0442\u043e\u0447\u043d\u044b\u0435 \u0441\u0442\u0440\u043e\u043a\u0438 \u0438\u0441\u043a\u0430\u0436\u0430\u044e\u0442 \u0438\u0442\u043e\u0433\u043e\u0432\u044b\u0435 \u0430\u0433\u0440\u0435\u0433\u0430\u0442\u044b.<\/p>\n
\u0421\u043f\u043e\u0441\u043e\u0431\u044b \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f<\/h4>\n
    \n
  1. \n
    COUNT(DISTINCT \u2026)<\/strong><\/code> \u2014 \u043f\u0440\u043e\u0441\u0442\u043e, \u043d\u043e \u0440\u0435\u0441\u0443\u0440\u0441\u043e\u0451\u043c\u043a\u043e.<\/p>\n<\/li>\n
  2. \n
    \u041f\u0440\u0435\u0434\u0430\u0433\u0440\u0435\u0433\u0430\u0446\u0438\u044f<\/strong> \u0434\u043e \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f:<\/p>\n
    WITH payment_agg AS (   SELECT trn_date, SUM(amount) AS gmv   FROM payments   GROUP BY trn_date ) SELECT c.d, COALESCE(p.gmv, 0) AS gmv FROM calendar c LEFT JOIN payment_agg p ON p.trn_date = c.d;<\/code><\/pre>\n<\/li>\n
  3. \n
    \u041e\u043a\u043e\u043d\u043d\u0430\u044f \u0444\u0438\u043b\u044c\u0442\u0440\u0430\u0446\u0438\u044f<\/strong>: ROW_NUMBER() OVER (PARTITION BY d ORDER BY \u2026) = 1<\/code>, \u0435\u0441\u043b\u0438 \u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f \u043e\u0434\u043d\u0430 \u0441\u0442\u0440\u043e\u043a\u0430 \u043d\u0430 \u0434\u0430\u0442\u0443.<\/p>\n<\/li>\n<\/ol>\n
    \u0420\u0435\u0442\u0435\u043d\u0448\u0435\u043d \u0441 \u043d\u0435\u043f\u043e\u043b\u043d\u044b\u043c\u0438 \u043b\u043e\u0433\u0430\u043c\u0438<\/h3>\n
    WITH activity AS (   SELECT user_id,          date_trunc('month', signup_date)   AS cohort_month,          date_trunc('month', activity_date) AS activity_month   FROM   user_activity ) SELECT cohort_month,        EXTRACT(MONTH FROM activity_month) -        EXTRACT(MONTH FROM cohort_month) + 1 AS month_n,        COUNT(DISTINCT user_id) AS active_users FROM activity GROUP BY 1,2 ORDER BY 1,2;<\/code><\/pre>\n
    \u041f\u0440\u0438 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0438 \u043b\u043e\u0433\u043e\u0432 \u0437\u0430 \u043c\u0435\u0441\u044f\u0446 \u0444\u0435\u0432\u0440\u0430\u043b\u044c \u0441\u043c\u0435\u0449\u0430\u0435\u0442\u0441\u044f, \u043e\u0448\u0438\u0431\u043e\u0447\u043d\u043e \u043f\u043e\u043f\u0430\u0434\u0430\u044f \u0432 \u043a\u043e\u043b\u043e\u043d\u043a\u0443 month_n = 1<\/code>.<\/p>\n
    \u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0439 \u0432\u0430\u0440\u0438\u0430\u043d\u0442:<\/p>\n
    WITH months AS (   SELECT date_trunc('month', gs)::date AS month   FROM   generate_series('2024-01-01','2024-12-01','1 month') gs ), signups AS (   SELECT user_id,          date_trunc('month', signup_date) AS cohort_month   FROM   user_activity   WHERE  event = 'signup' ), cross AS (   SELECT s.user_id, s.cohort_month, m.month AS activity_month   FROM   signups s   JOIN   months  m ON m.month >= s.cohort_month ), hits AS (   SELECT DISTINCT user_id,          cohort_month,          date_trunc('month', activity_date) AS activity_month   FROM   user_activity   WHERE  event = 'activity' ) SELECT   c.cohort_month,   (EXTRACT(YEAR  FROM c.activity_month) - EXTRACT(YEAR  FROM c.cohort_month))*12 +   (EXTRACT(MONTH FROM c.activity_month) - EXTRACT(MONTH FROM c.cohort_month)) + 1     AS month_n,   COUNT(DISTINCT c.user_id) FILTER (WHERE h.user_id IS NOT NULL) AS active_users FROM cross c LEFT JOIN hits h        ON h.user_id = c.user_id       AND h.activity_month = c.activity_month GROUP BY 1,2 ORDER BY 1,2;<\/code><\/pre>\n
    \u041a\u0430\u043b\u0435\u043d\u0434\u0430\u0440\u043d\u043e\u0435 \u0440\u0430\u0437\u0432\u0435\u0440\u0442\u044b\u0432\u0430\u043d\u0438\u0435 \u0441\u043e\u0445\u0440\u0430\u043d\u044f\u0435\u0442 \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u044b\u0439 \u043d\u043e\u043c\u0435\u0440 \u043c\u0435\u0441\u044f\u0446\u0430, \u0434\u0430\u0436\u0435 \u0435\u0441\u043b\u0438 \u0434\u0430\u043d\u043d\u044b\u0435 \u0437\u0430 \u043f\u0435\u0440\u0438\u043e\u0434 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u044e\u0442.<\/p>\n
    \u041a\u0443\u043c\u0443\u043b\u044f\u0442\u0438\u0432\u043d\u0430\u044f \u0432\u044b\u0440\u0443\u0447\u043a\u0430:<\/p>\n
    WITH calendar AS (   SELECT gs::date AS d   FROM generate_series('2025-01-01','2025-01-31','1 day') gs ), payments_agg AS (   SELECT trn_date, SUM(amount) AS daily_gmv   FROM payments   GROUP BY trn_date ), aligned AS (   SELECT c.d,          COALESCE(p.daily_gmv, 0) AS daily_gmv   FROM calendar c   LEFT JOIN payments_agg p ON p.trn_date = c.d ) SELECT d,        SUM(daily_gmv) OVER (ORDER BY d) AS gmv_cumulative FROM aligned ORDER BY d;<\/code><\/pre>\n
    \u041d\u0435\u043f\u0440\u0435\u0440\u044b\u0432\u043d\u044b\u0439 \u043a\u0430\u043b\u0435\u043d\u0434\u0430\u0440\u044c \u0433\u0430\u0440\u0430\u043d\u0442\u0438\u0440\u0443\u0435\u0442, \u0447\u0442\u043e \u043a\u0443\u043c\u0443\u043b\u044f\u0442\u0438\u0432\u043d\u0430\u044f \u043c\u0435\u0442\u0440\u0438\u043a\u0430 \u043d\u0435 \u043f\u0440\u043e\u043f\u0443\u0441\u043a\u0430\u0435\u0442 \u0434\u043d\u0438 \u0438 \u043d\u0435 \u0437\u0430\u043b\u0438\u043f\u0430\u0435\u0442 \u043d\u0430 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0435\u043c \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0438.<\/p>\n\n
    \u0415\u0441\u043b\u0438 \u0432\u0430\u043c \u0432\u0430\u0436\u043d\u043e \u043f\u0440\u043e\u0435\u043a\u0442\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u044b \u0442\u0430\u043a \u0436\u0435 \u0430\u043a\u043a\u0443\u0440\u0430\u0442\u043d\u043e, \u043a\u0430\u043a \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445, \u043f\u0440\u0438\u0433\u043b\u0430\u0448\u0430\u0435\u043c \u043d\u0430 \u043f\u0440\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0437\u0430\u043d\u044f\u0442\u0438\u044f. \u0424\u043e\u043a\u0443\u0441 \u2014 \u043d\u0430 \u043f\u0440\u0438\u043a\u043b\u0430\u0434\u043d\u044b\u0445 \u0438\u043d\u0441\u0442\u0440\u0443\u043c\u0435\u043d\u0442\u0430\u0445 \u0434\u043b\u044f \u0430\u043d\u0430\u043b\u0438\u0437\u0430 \u0438 \u043a\u043e\u043d\u0441\u0442\u0440\u0443\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0431\u0438\u0437\u043d\u0435\u0441-\u0440\u0435\u0448\u0435\u043d\u0438\u0439.<\/p>\n