Accountancy-trained FP&A and data analytics professional working across Excel, SQL, Python, Power BI and Claude agents. Tips, what I am working on, and the apps I build.https://nazmulhosen.nethttps://nazmulhosen.net/tips/pq-seven-lessonshttps://nazmulhosen.net/tips/pq-seven-lessonsJournal uploads, a P&L crosstab and a folder of team workbooks all came down to the same few habits. Here they are, with the case behind each one.Fri, 30 Oct 2026 20:00:00 GMThttps://nazmulhosen.net/tips/pq-allocation-to-journalhttps://nazmulhosen.net/tips/pq-allocation-to-journalShared costs split by percentage have to become one journal line per cost centre. Unpivot does the reshaping, and an account-level reconciliation explains every gap.Fri, 30 Oct 2026 19:00:00 GMThttps://nazmulhosen.net/tips/keytips-windows-muscle-memoryhttps://nazmulhosen.net/tips/keytips-windows-muscle-memoryI wanted Alt, H, V, V on my Mac, one key at a time. So I built KeyTips with Claude, and it now covers more than 1,100 sequences.Fri, 30 Oct 2026 18:00:00 GMThttps://nazmulhosen.net/tips/pq-journal-without-tableshttps://nazmulhosen.net/tips/pq-journal-without-tablesWhen source sheets can't become Excel tables, dynamic named ranges can feed Power Query instead. A debit-only plug then balances the cents without touching credits.Fri, 30 Oct 2026 17:30:00 GMThttps://nazmulhosen.net/tips/keytips-tap-not-chordhttps://nazmulhosen.net/tips/keytips-tap-not-chordTapping Option is easy to describe and surprisingly hard to detect. Here's the small design that makes sequential shortcuts safe.Fri, 30 Oct 2026 17:00:00 GMThttps://nazmulhosen.net/tips/pq-rules-table-journalhttps://nazmulhosen.net/tips/pq-rules-table-journalEvery mapping change used to mean editing code. Moving the logic into an editable rules sheet produced one query that finance users can maintain themselves.Fri, 30 Oct 2026 16:30:00 GMThttps://nazmulhosen.net/tips/keytips-missing-shortcutshttps://nazmulhosen.net/tips/keytips-missing-shortcutsPaste Values and Paste as Picture had no keys. The causes were guessed names and menus read too early, and the fix was a safety net.Fri, 30 Oct 2026 16:00:00 GMThttps://nazmulhosen.net/tips/pq-pnl-crosstabhttps://nazmulhosen.net/tips/pq-pnl-crosstabA 16-column monthly P&L over about 300,000 ledger rows. Step order makes the refresh workable, and one Table.Pivot argument keeps the layout from breaking.Fri, 30 Oct 2026 15:30:00 GMThttps://nazmulhosen.net/tips/keytips-speed-fixhttps://nazmulhosen.net/tips/keytips-speed-fixA shortcut that lags feels broken. One fix made KeyTips about 20 times faster in PowerPoint, and Excel users will recognise the cause.Fri, 30 Oct 2026 15:00:00 GMThttps://nazmulhosen.net/tips/pq-consolidate-team-workbookshttps://nazmulhosen.net/tips/pq-consolidate-team-workbooksSeveral teams, one workbook each, all in a cloud-synced folder. A per-file function stacks their journal sheets and handles the clutter that breaks a naive combine.Fri, 30 Oct 2026 14:30:00 GMThttps://nazmulhosen.net/tips/keytips-shipping-mac-apphttps://nazmulhosen.net/tips/keytips-shipping-mac-appGetting KeyTips working was the quick part. Letting other people install it means signing, notarization, permissions and updates.Fri, 30 Oct 2026 14:00:00 GMThttps://nazmulhosen.net/tips/keytips-liquid-glass-iconhttps://nazmulhosen.net/tips/keytips-liquid-glass-iconMy app needed an icon that fit modern macOS. What worked was starting from one idea, then letting Apple's tools draw the glass.Fri, 30 Oct 2026 13:00:00 GMThttps://nazmulhosen.net/tips/excel-mac-autosumhttps://nazmulhosen.net/tips/excel-mac-autosumExcel for Mac has its own AutoSum shortcut, Command-Shift-T. Here's how it behaves, and how I mapped it to Option-=.Fri, 30 Oct 2026 12:00:00 GMThttps://nazmulhosen.net/tips/power-query-unpivot-other-columnshttps://nazmulhosen.net/tips/power-query-unpivot-other-columnsBudget files with a column per month need unpivoting. One menu option and one automatic step decide whether the query survives a new month.Fri, 30 Oct 2026 11:00:00 GMThttps://nazmulhosen.net/tips/power-query-folder-combinehttps://nazmulhosen.net/tips/power-query-folder-combineFrom Folder is the classic month-end time saver. Three small additions keep it from failing on lock files or hiding where a number came from.Fri, 30 Oct 2026 10:00:00 GMThttps://nazmulhosen.net/tips/power-query-anti-join-reconciliationhttps://nazmulhosen.net/tips/power-query-anti-join-reconciliationSkip the VLOOKUP-and-filter-for-errors routine. A Left Anti merge returns exactly the rows that have no match, and it refreshes.Fri, 30 Oct 2026 09:00:00 GMThttps://nazmulhosen.net/tips/power-query-foldinghttps://nazmulhosen.net/tips/power-query-foldingWhen a query reads from a database, the order of your steps can decide whether the server does the work or your laptop does.Fri, 30 Oct 2026 08:00:00 GMThttps://nazmulhosen.net/tips/variance-percent-negative-budgethttps://nazmulhosen.net/tips/variance-percent-negative-budgetDividing by the budget breaks when the budget is a loss. One ABS() and a LET() fix it for good.Fri, 30 Oct 2026 00:00:00 GMThttps://nazmulhosen.net/tips/lag-missing-monthshttps://nazmulhosen.net/tips/lag-missing-monthsMonth-over-month SQL quietly compares the wrong periods when a month has no rows. Build a month spine first.Thu, 29 Oct 2026 00:00:00 GMThttps://nazmulhosen.net/tips/pandas-reconciliationhttps://nazmulhosen.net/tips/pandas-reconciliationAn outer merge with indicator and validate finds every break, and tells you when the keys themselves are the problem.Wed, 28 Oct 2026 00:00:00 GMThttps://nazmulhosen.net/tips/agent-tie-outhttps://nazmulhosen.net/tips/agent-tie-outAI agents work well on finance data when "done" means the numbers reconcile, and the check runs outside the agent's own judgment.Tue, 27 Oct 2026 00:00:00 GMT