arcodash blog https://www.arcodash.com/blog/ SQL that tells you when the number is wrong. en Thu, 29 Oct 2026 00:00:00 GMT SQL week over week alert: windows and thresholds https://www.arcodash.com/blog/sql-week-over-week-alert/ https://www.arcodash.com/blog/sql-week-over-week-alert/ Thu, 29 Oct 2026 00:00:00 GMT A SQL week over week alert that stays quiet on normal dips: which windows to compare, and how to set thresholds when counts are small. Dashboard shows wrong numbers? 5 SQL checks to schedule https://www.arcodash.com/blog/dashboard-green-number-wrong/ https://www.arcodash.com/blog/dashboard-green-number-wrong/ Tue, 20 Oct 2026 00:00:00 GMT Why a dashboard shows wrong numbers while every job says success, and the scheduled SQL checks that catch it, from grain to the unknown bucket. Dashboard taxidermy: your dashboard died, you stuffed it https://www.arcodash.com/blog/dashboard-taxidermy/ https://www.arcodash.com/blog/dashboard-taxidermy/ Wed, 14 Oct 2026 00:00:00 GMT Dead dashboards still refresh, still look official, and still get quoted. The four stages of dashboard taxidermy and how to make one talk or let it go. Number laundering: how a wrong metric becomes the truth https://www.arcodash.com/blog/number-laundering/ https://www.arcodash.com/blog/number-laundering/ Wed, 14 Oct 2026 00:00:00 GMT A number nobody checked becomes a number nobody questions in four hops: query, screenshot, slide, decision. How to stop it at the first one. The dashboard was green. The data was three days old. https://www.arcodash.com/blog/green-dashboard-stale-data/ https://www.arcodash.com/blog/green-dashboard-stale-data/ Wed, 14 Oct 2026 00:00:00 GMT Why the tool that shows the number should also check it: freshness, duplicates, null rate and row counts, with SQL you can copy. What AI should actually do in a BI tool https://www.arcodash.com/blog/ai-boring-work-in-bi/ https://www.arcodash.com/blog/ai-boring-work-in-bi/ Wed, 14 Oct 2026 00:00:00 GMT Plain-English questions with a read-only preview, one-click query repair, chart summaries and alerts that explain themselves. Per-seat BI pricing: what a bill that moves does to a team https://www.arcodash.com/blog/per-seat-bi-pricing/ https://www.arcodash.com/blog/per-seat-bi-pricing/ Mon, 12 Oct 2026 00:00:00 GMT Why bills that follow headcount, viewers or usage change how a team rolls out dashboards, what a fixed bill changes, and how to choose on fit. Postgres data freshness check: queries you can copy https://www.arcodash.com/blog/postgres-data-freshness-check/ https://www.arcodash.com/blog/postgres-data-freshness-check/ Mon, 12 Oct 2026 00:00:00 GMT Copyable Postgres queries that flag a table that stopped updating, for one table or many, plus the window and timezone traps that cause false alarms. Row count anomaly detection in SQL, no fixed floors https://www.arcodash.com/blog/row-count-anomaly-sql/ https://www.arcodash.com/blog/row-count-anomaly-sql/ Mon, 12 Oct 2026 00:00:00 GMT Compare each day's row count to the same weekday over the last 4 weeks with one window function. Returns rows only when something is wrong. Slack alert from a SQL query: DIY, then done right https://www.arcodash.com/blog/sql-alert-to-slack/ https://www.arcodash.com/blog/sql-alert-to-slack/ Mon, 12 Oct 2026 00:00:00 GMT A working cron + psql + Slack webhook script, where it breaks, and five rules for any SQL-to-Slack alert so it stays quiet until it matters. Why did this metric drop? A SQL root-cause routine https://www.arcodash.com/blog/why-did-this-metric-drop/ https://www.arcodash.com/blog/why-did-this-metric-drop/ Mon, 12 Oct 2026 00:00:00 GMT An alert says revenue is down 30%. Three SQL checks to run, in order, to find out why: freshness, contribution to change, and volume vs rate.