Search: "query tuning"

#excel #power query #decision

Decide when to use Power Query vs formulas vs a real database

I keep solving the same data problem three different ways across my team's sprea...

👁 10 views

Write a SQL query that returns the right answer when the data has duplicates

I'm writing a SQL query against tables [paste schemas, especially the join keys]...

#sql #joins #duplicates

👁 10 views

#excel #power-query #data-cleanup

Excel: Clean a Messy Address Column Without Losing Edge Cases

I have a column of free-text addresses scraped from a form: [PASTE 20 SAMPLES]. ...

Write a Cohort Retention Query That Doesn't Secretly Double-Count Users

I need a SQL cohort retention query that groups users by their signup week and s...

#data #sql #cohort

#data #warehouse #cost-optimization

Reduce data pipeline cost without losing freshness or completeness

You are a data platform engineer. Our [WAREHOUSE] bill is up 60% YoY while data ...

#excel #auditing #debugging

excel intermediate

Trace a broken cell reference across a workbook before fixing it blindly

Act as an Excel auditor. A formula on the summary tab is returning #REF! after a...

#data-quality #dashboard #sanity-check

Sanity Check a Dashboard Number That Looks Too Good to Be True

A number on my dashboard looks too good to be true. Metric: [METRIC NAME]. Repor...

#creative #logline #pitch

creative Intermediate

Write a Logline That Sells the Story Without Spoiling It

I need a logline for [project name] that I'll use on [where — a pitch deck, my a...

coding Advanced

Database Query Optimization with EXPLAIN Analysis

Analyze the following slow SQL query and its EXPLAIN output. Identify the bottle...

#coding #sql #database

#excel #automation #power-query

excel Advanced

Schedule an Excel file refresh without setting up a server

I have an Excel workbook that pulls data from a CSV in OneDrive via Power Query....

Write a query that survives the source table being renamed in six months

I need to write a SQL query that pulls weekly metrics for a dashboard. The sourc...

#sql #data #query

#analytics #debugging #metrics

Diagnose Why a Dashboard Metric Suddenly Changed

You are a senior data analyst. Walk me through a structured investigation for: [...

#excel #power-query #reconciliation

excel Advanced

Reconcile two messy spreadsheets when the join keys don't match

I have two Excel files I need to reconcile, but the join columns aren't clean ma...

#excel #dates #data cleaning

Turn a messy date column into clean, consistent dates in Excel

I have an Excel column of dates entered in mixed formats (some text, some real d...

Write a SQL Query from a Plain-English Question

You are a SQL expert and data analyst. I will describe a question in plain Engli...

#data #sql #query

#sql #analytics #business-questions

Translate a Business Question into a Defensible SQL Query

You are an analytics engineer. I will paste a fuzzy business question (e.g., 'ho...

#excel #power-query #office-scripts

excel Advanced

Automate a weekly Excel report that pulls from three CSVs and emails itself

You are an automation engineer. I get three CSVs every Monday — [CSV_1], [CSV_2]...

Write and Explain a SQL Query

You are an expert SQL expert. Help me write a correct SQL query and understand e...

#data #sql #query

coding Advanced

Optimize a SQL Query for Speed

You are a database performance engineer. I will paste a slow SQL query and the t...

#coding #sql #database

#excel #data cleaning #power query

Data: Write a SQL Query for a Cohort Retention Table

I want a SQL query that returns a cohort retention table — rows = signup month, ...

#data #sql #retention

👁 6 views

excel intermediate

Clean Messy Excel Data Step by Step

Act as a data cleaning specialist. My Excel sheet has these issues: [list proble...

👁 6 views

#duplicates #dedupe #power-query

Excel: Detect Duplicate Rows Across Multiple Key Columns

I have an Excel sheet where 'duplicates' aren't exact matches — they share a cus...

👁 5 views