Telegram RegisterThe public register of Telegram
Telegram profile photo for LEFT JOIN

Channel

LEFT JOIN

@leftjoin

On this record: Topic · Growth · Engagement · What this channel posts · Reactions · Stars · Posts · Citations · Telegram's recommendations · Cite this entry

42,064subscribers

-464 since we began measuring on 6 August 2026

Risers and fallers across the register · movement among entries of 31,623–100,000.

Register entry

Telegram ID-1001407735984
TypeChannel
Username@leftjoin
DescriptionПонятно про анализ данных, технологии, нейросети и, конечно, SQL. Услуги — leftjoin.ru Курсы по аналитике — https://stepik.org/users/431992492 Автор — Николай Валиотти Реклама — @valiotti Перечень РКН: https://tapthe.link/PpkTHavwS
Created12 November 2018 — measured — cross-checked against a third-party dataset (ext.tg_channel)
First recorded6 August 2026
Last confirmed live18 September 2026
Measurements held33
Confirmed unchanged1 time, most recently 18 September 2026
On Telegramt.me/leftjoin

Topic

Technology — a classification, not a measurement. An on-box language model (Qwen3.6-35B-A3B-FP8, prompt version 1) read this channel’s own recent posts on 9 September 2026 and assigned it the closest of 31 fixed categories, at 83% confidence. This is a model’s judgement about what the channel is likely to be about, not a fact this register measured the way a subscriber count or a view count is measured — it can be revised on a later pass, and it carries no weight anywhere else on this page. How this classification works, and why it has no browse page of its own yet.

Growth

42,06442,52942,296.56 August 2026 — 42,528 subscribers7 August 2026 — 42,516 subscribers8 August 2026 — 42,495 subscribers9 August 2026 — 42,489 subscribers10 August 2026 — 42,477 subscribers11 August 2026 — 42,468 subscribers12 August 2026 — 42,458 subscribers12 August 2026 — 42,445 subscribers14 August 2026 — 42,435 subscribers16 August 2026 — 42,529 subscribers17 August 2026 — 42,415 subscribers18 August 2026 — 42,393 subscribers19 August 2026 — 42,383 subscribers20 August 2026 — 42,378 subscribers21 August 2026 — 42,371 subscribers23 August 2026 — 42,355 subscribers24 August 2026 — 42,335 subscribers26 August 2026 — 42,322 subscribers26 August 2026 — 42,314 subscribers27 August 2026 — 42,315 subscribers28 August 2026 — 42,304 subscribers29 August 2026 — 42,294 subscribers30 August 2026 — 42,285 subscribers31 August 2026 — 42,260 subscribers1 September 2026 — 42,251 subscribers3 September 2026 — 42,246 subscribers4 September 2026 — 42,212 subscribers7 September 2026 — 42,187 subscribers10 September 2026 — 42,152 subscribers12 September 2026 — 42,121 subscribers14 September 2026 — 42,105 subscribers16 September 2026 — 42,070 subscribers18 September 2026 — 42,064 subscribers6 August 202618 September 2026
33 measurements spanning 43 days, net -464. Dots are measurements; the straight line between them is drawn to join them, not to claim we know the path taken in between — snapshots are recorded only when a count changes, so gaps mean “no change observed”, never “interpolated”. The vertical axis spans 41,994–42,599 and does not start at zero.
Measurement log — every subscribers count we have recorded, most recent 20 of 33
Measured (UTC)SubscribersChange
18 Sept 2026, 11:3642,064-6
16 Sept 2026, 05:1842,070-35
14 Sept 2026, 08:5942,105-16
12 Sept 2026, 17:3942,121-31
10 Sept 2026, 17:5742,152-35
7 Sept 2026, 12:1742,187-25
4 Sept 2026, 15:5642,212-34
3 Sept 2026, 00:4542,246-5
1 Sept 2026, 20:3542,251-9
31 Aug 2026, 18:0842,260-25
30 Aug 2026, 20:4642,285-9
29 Aug 2026, 21:0342,294-10
28 Aug 2026, 20:2842,304-11
27 Aug 2026, 19:5742,315+1
26 Aug 2026, 23:2742,314-8
26 Aug 2026, 01:0442,322-13
24 Aug 2026, 23:2742,335-20
23 Aug 2026, 09:4442,355-16
21 Aug 2026, 20:0542,371-7
20 Aug 2026, 15:0442,378first reading

Engagement

38 posts held, back to 26 June 2026 — the reader has not yet reached the start of this channel’s public history, so older posts may sit further back, unread. Read across 98 pages of Telegram’s post history, 20 posts per page.

ERR · 30 days
5.82%
avg views ÷ 42,064 subscribers
Avg views / post
2,450
10 posts measured
Reaction rate
0.351%
reactions ÷ views · ER floor
Posts in window
10
of 38 held

ERR is average views per post over the last 30 days divided by subscribers, the definition TGStat uses, so this figure is comparable with the one you will see elsewhere. It falls structurally as a channel grows: a high ERR on a small channel and a low one on a large channel describe reach mathematics, not quality. We publish the figure and the sample it came from and pass no verdict on it.

ER is defined industry-wide as (forwards + reactions + comments) ÷ views — note the denominator is views, not subscribers. Telegram’s public web preview carries views and reactions but not forward or comment counts, so the reaction rate above is the reactions term only and is therefore a floor: the true ER for this channel is higher by an amount we have not measured and will not estimate.

What these figures were computed from
WindowRolling 30 days · latest post in window 25 September 2026
Posts held38 (26 June 2026 – 25 September 2026)
Views total24,469
Reactions total86
Forwards / commentsnot exposed by the public surface — not measured, not estimated
Readings taken27 Sept 2026, 04:34 UTC

Views are a single reading per post, taken at the time above. A post published in the last day or two is still accumulating views, which pulls the 30-day average down slightly. That is a property of the standard definition rather than a fault in it, so we keep the definition rather than “correcting” the number into something nobody can reproduce.

Precision. Telegram publishes view counts on its public widget in short form — 8.12K, 3.7M — so any reading at or above 1,000 reaches us rounded to three significant figures, and only counts below 1,000 are exact. Averages and rates derived from them are shown to the same precision rather than to the unit: a figure like 3,701,250 would assert digits nobody measured.

Reaction counts are published per emoji and rounded the same way, so a total below 1,000 is exact and a larger one is a sum that may carry a rounded component from each emoji above 1,000. Because it is a sum, it does not look rounded — read a large reaction total as three significant figures per contributing emoji rather than as the figure it prints.

What this channel posts

Photos
≈971
Videos
≈29
Links
≈1,300

Lifetime counters from Telegram’s own channel header, read 27 September 2026 — not the date at the top of this page, which is when the subscriber count was last read. A count marked ≈ was rounded by Telegram before we ever saw it — t.me prints these counters in full below 1,000 and to three significant figures above, so ≈142,000 means somewhere between 141,500 and 142,499.

Reaction mix

515 reactions across 37 posts, in 18 distinct kinds. The most used accounts for 28.7% of them.

Every reaction kind recorded on the sample, most used first
ReactionCountShareShare, drawn
❤14828.7%
👍10620.6%
🔥9217.9%
😱509.71%
😁244.66%
🙈173.30%
🤣152.91%
👾122.33%
💯122.33%
🤔101.94%
🌚81.55%
😍71.36%
⚡40.777%
❤‍🔥40.777%
👌20.388%
🤓20.388%
👨‍💻10.194%
🥰10.194%

No sentiment is inferred, and none should be read in. This table is ordered by count and by nothing else. Emoji do not carry stable meaning across languages or communities — 🙏 is thanks in one channel and mourning in another — so we publish which ones were pressed and how often, and pass no judgement on what an audience meant by them.

Precision. Telegram publishes reaction counts per emoji and short-forms each one — 4.34K, 1.2M — so any single kind at or above 1,000 reaches us at three significant figures, and only counts below 1,000 are exact. The shares above are ratios of those figures and carry the same error. This is also why the total here can differ slightly from a reaction total printed elsewhere on the page: both are sums of the same rounded parts, taken over samples with different edges.

Coverage. Reactions were read on 38 of the 38 sampled posts in this sample. Summed by Telegram’s own count on each post — not by adding up the per-emoji breakdown above — those same posts carry 522 reactions in total: the kind of figure the paragraph above means by “a reaction total printed elsewhere on the page”.

Measured over the 38 most recent posts we hold, published 26 June 2026 to 25 September 2026, using the newest reading held for each. Telegram Stars are excluded: they are a payment, not a reaction, and they have their own section.

Telegram Stars

Stars received
6
across the posts below
Posts paid on
5
of 38 we hold a reading for · 13%
Most on one post
2
single highest reading

A paid reaction is a reader spending Telegram Stars — bought with money — on a post by @leftjoin. Telegram publishes the count on the public post preview alongside ordinary reactions, and this register reads it there. It is the only figure on this site that measures money moving rather than attention.

Stars are not reactions, and the two are never added. They are rendered in the same strip on Telegram and counted in the same shape, but one is a tap and the other is a purchase. The reaction totals and the engagement rate elsewhere on this page exclude every figure in this section, and no rate here is computed against a reaction count.

This is not revenue, and we publish no currency figure. What a Star costs a reader and what it pays a channel are different numbers, Telegram takes a share we cannot observe, and the terms have changed. Converting a Star count into money would be an estimate dressed as a measurement, so the count is where we stop.

Counted over the 38 most recent posts we hold for this entry, published 26 June 2026 to 25 September 2026. Star counts above 1,000 reach us in Telegram’s short form and carry the same three-significant-figure rounding as everything else on this page.

Recent posts

25 Sept 2026, 09:45 UTC999 views2 reactionsread 27 September 2026

Новый ИИ-бенчмарк подвезли Тем, как ИИ пишет код, взламывает сайты или решает математические задачи тысячелетия уже никого не удивишь. Современные флагманские модели уже давно переросли эти мелочи и созрели для того, чтобы показать, на что они способны в реальном мире. Например, как они умеют водить машину. За руль Тойоты посадили Astra, Sol, Grok и Fable и выпустили их на пустую парковку, где им нужно было за три …

👍2

23 Sept 2026, 10:07 UTC≈1,380 views13 reactionsread 27 September 2026

Как грамотно делегировать задачи ИИ Внедрение искусственного интеллекта и агентов в работу — это все еще острый вопрос. Его обсудили в одном из недавних выпусков подкаста «Доверительный интервал» от сообщества аналитиков Яндекса. В чём суть: 🔵 Активнее всего агентов используют джуны, а сеньоры все еще настроены скептически, потому что даже с очень умным ИИ многие задачи им быстрее сделать руками. Приходится выбирать…

👍7❤3🔥3

18 Sept 2026, 10:45 UTC≈2,130 views15 reactionsread 27 September 2026
Photo

Что делать с тепловыми картами и хороплетами? Все виды графиков и чартов по-своему хороши и заслуживают любви, но, если честно, значительную часть из них большинство любят на расстоянии. Старых добрых линейных и столбчатых диаграмм хватает под большинство задач, их легко нарисовать в любом инструменте для визуализации и, самое главное, легко читать. Более хитрые варианты вроде тех же тепловых карт или хороплетов исп…

❤9🔥6

16 Sept 2026, 10:45 UTC≈2,440 views7 reactionsread 27 September 2026

3D-карты СУБД Отвлечемся от новостей про ИИ и скандалов вокруг OpenAI и посмотрим, что внутри Redis и PostgreSQL. 🔵Redis — это NoSQL СУБД типа ключ-значение, которая которая хранит данные в оперативной памяти. Для тех, кто хочет разобраться, как же она это делает, нарисовали целую интерактивную карту. Ее можно повертеть со всех сторон, понажимать на отдельные элементы и посмотреть, как байты данных перемещаются меж…

🔥4❤3

14 Sept 2026, 10:49 UTC≈2,550 views13 reactionsread 27 September 2026

Решение математических проблем это не просто бенчмарк На прошлой неделе разгорелся серьезный скандал вокруг одной из математических задач тысячелетия — а именно доказательство существования определенного способа решения уравнений Навье-Стокса. OpenAI объявила, что их внутренняя модель, более мощная, чем Astra, нашла решение проблемы — только вот ее опередили. Два математика сделали это раньше, причем с использованием…

👍8😁3❤2

11 Sept 2026, 10:22 UTC≈2,830 views5 reactions2 Starsread 27 September 2026
Photo

Astra смогла, а вы сможете? Мы с вами недавно обсуждали эссе, опубликованное на сайте OpenAI, где автор сказал следующее: Чтобы начать влиять на реальный мир — стать очень полезным или очень опасным — ИИ не надо стать лучше людей во всех сферах. Ему надо стать лучше в достаточном количестве из них. И кое в чем новая их модель уже стала лучше многих людей: она прошла все 48 уровней I Am Not A Robot, где надо решать …

👍5

8 Sept 2026, 10:45 UTC≈2,710 views9 reactionsread 27 September 2026

Чуждый разум ChatGPT OpenAI показала GPT‑6 Astra и вновь заговорила на любимую тему — риски приближающейся эпохи AGI (artificial general intelligence или общего искусственного интеллекта). Ведущий научный сотрудник компании Джейкоб Пачоки написал на эту тему эссе «Чуждый разум». Ключевые мысли: 🔵ИИ не столько создают, сколько выращивают с помощью постоянной оптимизации и сложных вычислений. В результате получается с…

❤5🔥3😱1

5 Sept 2026, 07:34 UTC≈3,060 views6 reactionsread 27 September 2026

Lead Data Engineer, найдись! Valiotti Data — AI-native команда дата-инженеров и аналитиков. Консультируем растущие компании: встраиваемся в бизнес, решаем задачу, строим систему и передаем знания команде клиента. Задачи: архитектура данных, менторинг дата-инженеров, общение с заказчиками. Пример проекта. Клиент из Канады продает лидов через LeadByte, платежи принимает через Stripe. Нужно свести две системы: сколько…

❤2🤔2👍1😱1

3 Sept 2026, 11:25 UTC≈3,070 views10 reactionsread 27 September 2026

Для важных переговоров Бывает у вас такое, что коллега отправил вам сообщение в ответ на ваш вопрос, вы читаете и понимаете — он сам тут ни слова не написал. Может быть даже не читал. Он просто отправил ваш вопрос Claude или ChatGPT и переслал вам их ответ. Наверное, кто-то к такому относиться с пониманием, но если вам такой подход не по душе — ловите полезную ссылку. Копируете и отправляете вашему собеседнику, мож…

😁6❤4

31 Aug 2026, 11:30 UTC≈3,300 views6 reactionsread 27 September 2026

Как боты пользуются интернетом Продолжаем тему ИИ и визуализации данных — на этот раз смотрим, как боты захватывают интернет. Вы наверняка видели новости про то, что объем трафика, сгенерированного ботами, превысил объемы человеческого. В The Agentic Web Index можно посмотреть, из чего он складывается и что за боты ходят по нашим сайтам. 🔵Значительная его часть приходится на поисковых ботов (они же краулеры), котор…

👍3❤2🔥1

28 Aug 2026, 11:15 UTC≈3,390 views27 reactionsread 27 September 2026

«ИИ станет либо величайшим уравнителем из когда-либо созданных, либо худшим источником несправедливости» Билл Гейтс опубликовал эссе о влиянии ИИ на общество: как оно меняется уже сейчас, что ждет его в будущем и что нужно сделать, чтобы эти перемены были менее болезненными для всех нас. Далеко не первый и не последний материал на эту тему, но интересный за счет попытки смотреть на вопрос непредвзято, без нагнетания …

👍16❤6⚡2👾2👨‍💻1

26 Aug 2026, 11:06 UTC≈2,810 views10 reactionsread 27 September 2026

Независимый рейтинг ИИ Artificial Analysis — проект на стыке наших с вами любимых тем: ИИ, аналитика и визуализация данных. Там сравнивают модели ИИ по всем возможным показателям: интеллект в целом и успешность прохождения разных бенчмарков по отдельности, скорость работы, стоимость, «открытость» и прозрачность для публики. 🔵В рейтинге участвуют не только ChatGPT с Claude — там сотни моделей, включая совсем маленьк…

❤5👍3🔥2

Showing the 12 most recent of 38 posts we hold for @leftjoin. View and reaction counts are the latest single reading for each post, not a live figure, and a recent post is still accumulating both. A view count marked ≈ was rounded by Telegram before we ever saw it — t.me prints views in full below 1,000 and to three significant figures above, so ≈1,200,000 means somewhere between 1,150,000 and 1,249,999. Unmarked counts are exact. Text is reproduced from the public post preview and truncated for length.

Stars beside a post are paid reactions — Telegram Stars, bought with money and spent on that post. They are a different unit from reactions and are never added to them, here or anywhere else on this page.

Forward network

Built only from forwarded posts we have actually read, on both sides. Coverage is early and deliberately incomplete: a missing link means we have not read the post that would prove it, never that the relationship does not exist. Counts are distinct forwarded posts observed, so they only ever go up as we read more.

Mentions

Named by 5 registered channels — every channel on the register whose own posts have named this one, by its current username or any other username it currently holds, merged from two separately captured readings of the same fact so a namer caught by only one of them is not missed and a namer both caught is not counted twice. A username this channel has since dropped is not matched — that handle may belong to someone else now, and crediting today’s namer to yesterday’s owner would misattribute it.

A mention is a weaker signal than a forward and is counted separately for that reason — naming a channel is not republishing it, and a handle in a post body is easy to place deliberately. The post counts beside each row below are distinct posts in which the handle appeared, from posts we have read on both sides — the “Named by N registered channels” figure above is a different count, of distinct NAMING CHANNELS rather than posts, and is not the sum of the rows under it.

Channels Telegram recommends alongside this one

Telegram’s own answer, not this register’s. When this register asks Telegram’s API what is similar to this channel, this is the list it returns, in the exact order Telegram returns it — never re-sorted by subscribers or by anything else this register measures. The relationship, and the order, are Telegram’s; we record them and date them, and make no claim of our own about which of these channels actually resemble this one.

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rzv Data Engineering
@rzv_de · 3,007
#72
Data-comics
@datavizcomics · 6,499
#73
Анализ данных (Data analysis)
@data_analysis_ml · 50,656
#74
Чартомойка
@chartomojka · 14,845
#75
novichkov.net
@novichkovnet · 3,383
#76
табличный дизайн
@thisisnotatable · 7,270
#77
Диаграммы и презентации
@kirsha_vis · 7,963
#78
Job for Analysts & Data Scientists
@foranalysts · 36,643
#79
Сделай это красиво
@perfectgraphs · 5,210
#80
Сиолошная
@seeallochnaya · 79,594
#81
Медуза — LIVE
@meduzalive · 1,122,482
#82
эйай ньюз
@ai_newz · 96,889
#83
addmeto
@addmeto · 71,835
#84
Дата-арт
@dataart11 · 2,324
#85
BOGDANISSSIMO
@bogdanisssimo · 6,992
#86
Connectable Jobs
@zarubezhom_jobs · 103,632
#87
Датавизнутая
@dataviz_addict · 1,170
#88
Канал Алексея Куличевского
@kulichevskiy · 3,440
#89
Dataviz jobs
@dataviz_jobs · 3,775
#90
Dev & ML Connectable Jobs
@dev_connectablejobs · 27,959
#91
RationalAnswer | Павел Комаровский
@RationalAnswer · 107,713
#92
Дудь
@yurydud · 862,341
#93
Media Малькевич 🇷🇺
@alexandr_malkevich · 56,256
#94
Data Memes
@surfalytics · 516
#95

Read from Telegram’s recommendation API, most recently 29 August 2026. Telegram holds a list like this for a small and growing share of the register — how this is measured, and why most channel pages show nothing here.

Appears in Telegram’s recommendations for other channels

The reverse of the list above, and a different kind of signal. This does not require this channel to have ever been asked about directly — each row below is a channel we DID ask Telegram about, whose Telegram-generated list happened to include this one. A channel can appear here with an empty list above it, because being named by someone else’s query is independent of having been queried itself.

Reveal the Data
@revealthedata · 27,806
Telegram ranks this channel #2 of 96 here — alongside 95 others — read 10 September 2026
Клуб анонимных аналитиков
@analyst_club · 33,554
Telegram ranks this channel #3 of 96 here — alongside 95 others — read 4 September 2026
Инжиниринг Данных
@rockyourdata · 23,732
Telegram ranks this channel #4 of 93 here — alongside 92 others — read 17 September 2026
настенька и графики
@nastengraph · 28,213
Telegram ranks this channel #5 of 94 here — alongside 93 others — read 9 September 2026
karpov.courses
@KarpovCourses · 27,446
Telegram ranks this channel #7 of 96 here — alongside 95 others — read 10 September 2026
Stepik – онлайн-курсы
@stepik_courses · 24,454
Telegram ranks this channel #13 of 93 here — alongside 92 others — read 16 September 2026
Noukash
@noukashblog · 21,622
Telegram ranks this channel #15 of 95 here — alongside 94 others — read 23 September 2026
Google Таблицы
@google_sheets · 60,389
Telegram ranks this channel #19 of 98 here — alongside 97 others — read 22 August 2026
Data Science. SQL hub
@sqlhub · 35,960
Telegram ranks this channel #20 of 87 here — alongside 86 others — read 2 September 2026
Рациональные числа
@rationalnumbers · 25,698
Telegram ranks this channel #29 of 93 here — alongside 92 others — read 13 September 2026
Job for Analysts & Data Scientists
@foranalysts · 36,643
Telegram ranks this channel #32 of 96 here — alongside 95 others — read 1 September 2026
РИТА ЭБЗЕЕВА
@mosmosru · 101,277
Telegram ranks this channel #34 of 90 here — alongside 89 others — read 15 August 2026
Яндекс Практикум
@yndx_practicum · 33,979
Telegram ranks this channel #39 of 97 here — alongside 96 others — read 3 September 2026
Яндекс про аналитику
@YAN_analytic · 20,959
Telegram ranks this channel #41 of 98 here — alongside 97 others — read 25 September 2026
Анализ данных (Data analysis)
@data_analysis_ml · 50,656
Telegram ranks this channel #45 of 93 here — alongside 92 others — read 25 August 2026
Базы данных | Access, SQL, Big Data
@databases_secrets · 30,002
Telegram ranks this channel #46 of 82 here — alongside 81 others — read 7 September 2026
Время Валеры
@cryptovalerii · 30,808
Telegram ranks this channel #50 of 94 here — alongside 93 others — read 6 September 2026
Excel Everyday
@excel_everyday · 52,367
Telegram ranks this channel #50 of 97 here — alongside 96 others — read 24 August 2026
Media Малькевич 🇷🇺
@alexandr_malkevich · 56,256
Telegram ranks this channel #51 of 87 here — alongside 86 others — read 23 August 2026
Поколение Python 🐍
@pygen_ru · 50,072
Telegram ranks this channel #57 of 93 here — alongside 92 others — read 25 August 2026
Python вопросы с собеседований
@python_job_interview · 24,881
Telegram ranks this channel #65 of 90 here — alongside 89 others — read 15 September 2026
Журнал «Код»
@thecodemedia · 49,232
Telegram ranks this channel #69 of 97 here — alongside 96 others — read 25 August 2026

This channel appears in 22 seed channels' Telegram-generated recommendation lists in total. Each is Telegram’s list for THAT channel, not this one — see how this is measured.

Cite this entry

A live page changes as we take new readings, so a citation should name the measurement it is based on, not just the URL. The line below cites the subscriber count as measured 18 September 2026 — this entry's latest reading, not the date you are reading this.

“LEFT JOIN” (@leftjoin), 42,064 subscribers as measured 18 September 2026. Telegram Register, tgregister.com/channel/leftjoin.

Full measurement history, CC BY 4.0. Every reading this register holds for this entry, not just the latest one, as a dated, downloadable record: CSV · JSON. Free to use with attribution to tgregister.com. Each file carries its own generation timestamp, which is the figure to cite for exactly when the data was retrieved.