Michael Nocito

Data analyst, eight years of enterprise data migration. I write step by step guides for analyst work and build browser practice kits for SQL, Excel, Python, Power BI and Tableau.

Glassboro, New Jersey Joined on Jul 24, 2026 https://michaelnocito.github.io/analyst-prep-kit/

Work

Data analyst

Pinned

Michael Nocito

Aug 12

SQL Foundations, Start to Finish

#sql #database #tutorial #beginners

15 min read

Michael Nocito

Aug 11

How to Verify an AI Agent Actually Did the Work

#dataanalysis #career #tutorial #beginners

13 min read

Michael Nocito

Aug 24

INDEX MATCH vs VLOOKUP: The Lookup That Survives a New Column

#excel #dataanalysis #tutorial #beginners

17 min read

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Michael Nocito

Aug 24

Nested IF vs IFS in Excel: The Order That Silently Relabels Your Data

#excel #dataanalysis #tutorial #beginners

14 min read

Michael Nocito

Aug 24

How to Use IFERROR in Excel, and What It Quietly Hides

#excel #dataanalysis #tutorial #beginners

15 min read

Michael Nocito

Aug 23

Excel Dynamic Arrays: FILTER, UNIQUE and SORT in One Formula

#excel #dataanalysis #tutorial #beginners

14 min read

Michael Nocito

Aug 23

Excel Dates: Serial Numbers, Text That Looks Like a Date, and How to Fix It

#excel #dataanalysis #tutorial #beginners

15 min read

Michael Nocito

Aug 23

Excel Drop Down Lists and Data Validation, and the Paste That Removes Them

#excel #dataanalysis #tutorial #beginners

14 min read

Michael Nocito

Aug 23

Conditional Formatting Based on Another Cell

#excel #dataanalysis #tutorial #beginners

14 min read

Michael Nocito

Aug 22

How to Clean Messy Data in Excel: TRIM, CLEAN and the Space You Cannot See

#excel #dataanalysis #tutorial #beginners

14 min read

Michael Nocito

Aug 22

How to Connect Tableau to Your Data (And What Happens the Moment You Do)

#tableau #datavisualization #dataanalysis #tutorial

11 min read

Michael Nocito

Aug 22

How to Connect Python to a SQL Database (Straight Into a DataFrame)

#python #pandas #dataanalysis #tutorial

10 min read

Michael Nocito

Aug 22

How to Connect Excel to a SQL Database (And Stop Pasting)

#excel #dataanalysis #tutorial #beginners

12 min read

Michael Nocito

Aug 22

How to Review AI-Generated SQL Before You Trust the Number

#dataanalysis #career #tutorial #beginners

9 min read

Michael Nocito

Aug 22

How to Practice SQL Online With Nothing Installed (And Where Your Data Goes)

#sql #database #tutorial #beginners

11 min read

Michael Nocito

Aug 22

Where to Get a Sample Database to Practice SQL (And How to Check It Loaded)

#sql #database #tutorial #beginners

13 min read

Michael Nocito

Aug 22

Customer Segmentation in SQL With CASE WHEN

#sql #database #tutorial #beginners

14 min read

Michael Nocito

Aug 21

Which SQL Database Should You Install?

#sql #database #tutorial #beginners

6 min read

Michael Nocito

Aug 21

VLOOKUP vs XLOOKUP: Which One to Use, and How to Switch

#excel #dataanalysis #tutorial #beginners

13 min read

Michael Nocito

Aug 21

NULL in SQL: Why = NULL Finds Nothing and What to Write Instead

#sql #database #tutorial #beginners

14 min read

Michael Nocito

Aug 21

Month-over-Month Growth in SQL: LAG, the Growth Formula, and the Traps

#sql #database #tutorial #beginners

15 min read

Michael Nocito

Aug 21

How to Find Duplicate Rows in SQL (and Decide What Counts as One)

#sql #database #tutorial #beginners

15 min read

Michael Nocito

Aug 21

Calculated Column vs Measure in Power BI: The Rule That Decides

#powerbi #dataanalysis #tutorial #beginners

14 min read

Michael Nocito

Aug 21

pandas GroupBy: How to Summarize a DataFrame Without Losing Track of Your Rows

#python #pandas #dataanalysis #tutorial

16 min read

Michael Nocito

Aug 21

SUMIFS and COUNTIFS: Add Up Only the Rows That Match

#excel #dataanalysis #tutorial #beginners

12 min read

Michael Nocito

Aug 21

Excel Just Summed Your ID Numbers and Said Nothing

#excel #dataanalysis #tutorial #beginners

6 min read

Michael Nocito

Aug 21

Sort Your Bar Chart or It Means Nothing

#excel #dataanalysis #tutorial #beginners

5 min read

Michael Nocito

Aug 21

Make One Control Drive Every Chart on the Page

#excel #dataanalysis #tutorial #beginners

6 min read

Michael Nocito

Aug 21

SQL Comment Syntax by Database: MySQL, PostgreSQL, SQL Server, SQLite, Oracle

#sql #database #tutorial #beginners

5 min read

Michael Nocito

Aug 21

COMMENT ON TABLE: How to Store a Table Description in the Database Itself

#sql #database #tutorial #beginners

6 min read

Michael Nocito

Aug 21

How to Comment in SQL: -- and /* */, and the Two Traps That Break a Query

#sql #database #tutorial #beginners

9 min read

Michael Nocito

Aug 21

A Pivot Table Is a Question, Not a Report

#excel #dataanalysis #tutorial #beginners

6 min read

Michael Nocito

Aug 21

Percentages Are the Whole Story and Excel Hides Them

#excel #dataanalysis #tutorial #beginners

5 min read

Michael Nocito

Aug 21

Pick the Chart Your Number Already Decided

#excel #dataanalysis #tutorial #beginners

6 min read

Michael Nocito

Aug 21

Name Your Data So Your Formulas Stop Breaking

#excel #dataanalysis #tutorial #beginners

7 min read

Michael Nocito

Aug 21

Label Your Rows Before You Chart Them

#excel #dataanalysis #tutorial #beginners

8 min read

Michael Nocito

Aug 20

Four Numbers Across the Top Do More Than Four Charts

#excel #dataanalysis #tutorial #beginners

6 min read

Michael Nocito

Aug 20

One Row at a Time, or All Rows at Once

#excel #dataanalysis #tutorial #beginners

6 min read

Michael Nocito

Aug 20

Write the Sentence Your Dashboard Is Arguing

#excel #dataanalysis #tutorial #beginners

6 min read

Michael Nocito

Aug 20

Show the Unit Without Breaking the Number

#excel #dataanalysis #tutorial #beginners

6 min read

Michael Nocito

Aug 20

The Finding That Was Just Your Own Definition

#excel #dataanalysis #tutorial #beginners

6 min read

Michael Nocito

Aug 19

The Dialog That Quietly Deletes Your Zip Codes

#excel #dataanalysis #tutorial #beginners

6 min read

Michael Nocito

Aug 19

Check Your Work Before Anyone Else Does

#excel #dataanalysis #tutorial #beginners

8 min read

Michael Nocito

Aug 19

Chart Design Basics: Take Things Away, Then Point

#excel #dataanalysis #tutorial #beginners

6 min read

Michael Nocito

Aug 19

The Names Came In as Gibberish and Excel Said Nothing

#excel #dataanalysis #tutorial #beginners

6 min read

Michael Nocito

Aug 18

Correlation vs Causation: The Three Explanations for Any Pattern

#dataanalysis #career #tutorial #beginners

14 min read

Michael Nocito

Aug 17

How to Choose the Right Chart: One Question About Your Data

#datavisualization #dataanalysis #tutorial #beginners

14 min read

Michael Nocito

Aug 17

Budget vs Actual Variance Analysis: The Sign Trap and the Percent Trap

#dataanalysis #career #tutorial #beginners

14 min read

Michael Nocito

Aug 17

Operations Analytics, Start to Finish

#dataanalysis #career #tutorial #beginners

18 min read

Michael Nocito

Aug 17

Build a Dashboard in This Order: Correct, Then Clear, Then Compelling

#excel #dataanalysis #tutorial #beginners

10 min read

Michael Nocito

Aug 17

Build a Risk Index That Colors Itself

#dataanalysis #career #tutorial #beginners

7 min read

Michael Nocito

Aug 16

One Migration, Start to Finish

#dataengineering #database #career #tutorial

15 min read

Michael Nocito

Aug 16

What Data Migration Actually Is

#dataengineering #database #career #tutorial

6 min read

Michael Nocito

Aug 16

Stage 6: User Acceptance Testing

#dataengineering #database #career #tutorial

4 min read

Michael Nocito

Aug 16

Scope Creep and the Project Plan

#dataengineering #database #career #tutorial

4 min read

Michael Nocito

Aug 16

When the Client Goes Quiet

#dataengineering #database #career #tutorial

5 min read

Michael Nocito

Aug 15

Ask the Right Questions First

#dataengineering #database #career #tutorial

4 min read

Michael Nocito

Aug 15

Stage 2: Profile the Source

#dataengineering #database #career #tutorial

4 min read

Michael Nocito

Aug 15

What Goes Wrong, and What It Costs

#dataengineering #database #career #tutorial

4 min read

Michael Nocito

Aug 15

Stage 1: Kickoff and Scope

#dataengineering #database #career #tutorial

4 min read

Michael Nocito

Aug 15

Stage 8: Hypercare and Close

#dataengineering #database #career #tutorial

4 min read

Michael Nocito

Aug 14

Keeping Your Own Files Straight

#dataengineering #database #career #tutorial

4 min read

Writing Debut

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