PJ

1.2K posts

PJ

PJ

@Praisee__

Data analyst๐Ÿ“Š | Learning data analytics in public | Sharing what clicks and what challenges me

Lagos, Nigeria Katฤฑlฤฑm ลžubat 2026
123 Takip Edilen140 Takipรงiler
PJ retweetledi
LOLU
LOLU@Lolu_rayoยท
Day 50/120โœ… Long time no postsโ€ฆ..but better late than never right? Laptop got spoil which put my learning on hold for sometime. Hereโ€™s what Iโ€™ve done so far: I started a guided project with @Rita_tyna in Power BI.
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LOLU@Lolu_rayo

Day 45/120 with @Rita_tyna The past week has been slow. Not by choice, just one of those situations where things donโ€™t go as planned. I had started building momentum, getting into the flow the flow thenโ€ฆโ€ฆno power for days๐Ÿคง๐Ÿคง.

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Adeojo Omolola
Adeojo Omolola@LolaAdeojoยท
Day 72/120: Overview page of the Supplier Performance Dashboard. Worked through DAX, time intelligence, parameters, charts, and dashboard design. Challenging, but one of the most practical projects so far. #DataAnalyticsLockedIn
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_Hafsoh_
_Hafsoh_@ajoke_ofeยท
My Twitter interactions circle but I call you all family. One cold malt for each of you ๐Ÿบ Say hi if you can see yourself here
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Dare
Dare@Dare_0xยท
Prepping for my internship involves me practicing mid tier SQL questions Ngl they felt more high tier than mid tier to me ๐Ÿ˜น๐Ÿ’€
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Tonymike1942
Tonymike1942@TonyMike1942ยท
Charts in excel is all about story telling, visualizing your data for better understanding
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PJ
PJ@Praisee__ยท
I also learned how the VAR function helps store calculations and makes DAX measures cleaner and easier to read. Then I added everything into KPI cards so the changes in performance could be seen instantly on the dashboard.
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PJ
PJ@Praisee__ยท
Day 50/120 โ€“ Guided project I continued building my retail dashboard in Power BI and started connecting more meaning to the numbers I've been working with.
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J.A Olaoye
J.A Olaoye@JA_Olaoyeยท
Good morning folks. Itโ€™s going to be a great week.
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J.A Olaoye
J.A Olaoye@JA_Olaoyeยท
I find the first 3 chapters relevant for Beginners in Data. It expands your view of how you should see data at first glance.
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J.A Olaoye
J.A Olaoye@JA_Olaoyeยท
Learning Power Bi without Structure? I got you covered PowerBI-Learning-Roadmap/ โ”‚ โ”œโ”€โ”€ 01_Foundation_of_BI/ โ”‚ โ”œโ”€โ”€ What_is_Business_Intelligence โ”‚ โ”œโ”€โ”€ Data_vs_Information_vs_Insights โ”‚ โ”œโ”€โ”€ KPI_and_Metrics โ”‚ โ”œโ”€โ”€ Reporting_vs_Analytics โ”‚ โ”œโ”€โ”€ OLTP_vs_OLAP โ”‚ โ””โ”€โ”€ Data_Driven_Decision_Making โ”‚ โ”œโ”€โ”€ 02_PowerBI_Introduction/ โ”‚ โ”œโ”€โ”€ PowerBI_Desktop โ”‚ โ”œโ”€โ”€ PowerBI_Service โ”‚ โ”œโ”€โ”€ PowerBI_Mobile โ”‚ โ”œโ”€โ”€ PowerBI_Gateway โ”‚ โ”œโ”€โ”€ Licensing_Concepts โ”‚ โ””โ”€โ”€ PowerBI_Ecosystem โ”‚ โ”œโ”€โ”€ 03_Data_Sources_and_Connections/ โ”‚ โ”œโ”€โ”€ Excel โ”‚ โ”œโ”€โ”€ CSV_and_Text โ”‚ โ”œโ”€โ”€ SQL_Server โ”‚ โ”œโ”€โ”€ APIs โ”‚ โ”œโ”€โ”€ SharePoint โ”‚ โ”œโ”€โ”€ Azure_Sources โ”‚ โ”œโ”€โ”€ Folder_Connections โ”‚ โ””โ”€โ”€ Web_Data โ”‚ โ”œโ”€โ”€ 04_Power_Query_ETL/ โ”‚ โ”œโ”€โ”€ Query_Editor โ”‚ โ”œโ”€โ”€ Data_Cleaning โ”‚ โ”œโ”€โ”€ Remove_Duplicates โ”‚ โ”œโ”€โ”€ Merge_Queries โ”‚ โ”œโ”€โ”€ Append_Queries โ”‚ โ”œโ”€โ”€ Pivot_and_Unpivot โ”‚ โ”œโ”€โ”€ Conditional_Columns โ”‚ โ”œโ”€โ”€ Custom_Columns โ”‚ โ”œโ”€โ”€ Parameters โ”‚ โ”œโ”€โ”€ Data_Types โ”‚ โ”œโ”€โ”€ Error_Handling โ”‚ โ””โ”€โ”€ M_Language_Basics โ”‚ โ”œโ”€โ”€ 05_Data_Modeling/ โ”‚ โ”œโ”€โ”€ Tables_and_Relationships โ”‚ โ”œโ”€โ”€ Primary_and_Foreign_Keys โ”‚ โ”œโ”€โ”€ Cardinality โ”‚ โ”œโ”€โ”€ Filter_Direction โ”‚ โ”œโ”€โ”€ Star_Schema โ”‚ โ”œโ”€โ”€ Snowflake_Schema โ”‚ โ”œโ”€โ”€ Fact_and_Dimension_Tables โ”‚ โ”œโ”€โ”€ Data_Granularity โ”‚ โ”œโ”€โ”€ Bridge_Tables โ”‚ โ”œโ”€โ”€ Calendar_Table โ”‚ โ””โ”€โ”€ Model_Optimization โ”‚ โ”œโ”€โ”€ 06_DAX_Fundamentals/ โ”‚ โ”œโ”€โ”€ Calculated_Columns โ”‚ โ”œโ”€โ”€ Measures โ”‚ โ”œโ”€โ”€ Aggregation_Functions โ”‚ โ”œโ”€โ”€ IF_and_SWITCH โ”‚ โ”œโ”€โ”€ Variables โ”‚ โ”œโ”€โ”€ Filter_Context โ”‚ โ”œโ”€โ”€ Row_Context โ”‚ โ”œโ”€โ”€ CALCULATE_Function โ”‚ โ”œโ”€โ”€ RELATED_and_LOOKUPVALUE โ”‚ โ””โ”€โ”€ Time_Intelligence_Basics โ”‚ โ”œโ”€โ”€ 07_Intermediate_DAX/ โ”‚ โ”œโ”€โ”€ Advanced_CALCULATE โ”‚ โ”œโ”€โ”€ ALL_and_ALLEXCEPT โ”‚ โ”œโ”€โ”€ FILTER_Function โ”‚ โ”œโ”€โ”€ Iterators_SUMX_AVERAGEX โ”‚ โ”œโ”€โ”€ Ranking_Functions โ”‚ โ”œโ”€โ”€ Dynamic_Measures โ”‚ โ”œโ”€โ”€ Running_Totals โ”‚ โ”œโ”€โ”€ Year_to_Date โ”‚ โ”œโ”€โ”€ Month_to_Date โ”‚ โ”œโ”€โ”€ Previous_Period_Analysis โ”‚ โ””โ”€โ”€ KPI_Calculations โ”‚ โ”œโ”€โ”€ 08_Data_Visualization/ โ”‚ โ”œโ”€โ”€ Charts_and_Graphs โ”‚ โ”œโ”€โ”€ Tables_and_Matrix โ”‚ โ”œโ”€โ”€ Cards_and_KPIs โ”‚ โ”œโ”€โ”€ Maps โ”‚ โ”œโ”€โ”€ Slicers โ”‚ โ”œโ”€โ”€ Drillthrough โ”‚ โ”œโ”€โ”€ Tooltips โ”‚ โ”œโ”€โ”€ Conditional_Formatting โ”‚ โ”œโ”€โ”€ Bookmarks โ”‚ โ”œโ”€โ”€ Buttons_and_Navigation โ”‚ โ””โ”€โ”€ Dashboard_Design_Principles โ”‚ โ”œโ”€โ”€ 09_Report_Design_and_UX/ โ”‚ โ”œโ”€โ”€ Storytelling_with_Data โ”‚ โ”œโ”€โ”€ Color_Theory โ”‚ โ”œโ”€โ”€ Layout_Design โ”‚ โ”œโ”€โ”€ Executive_Dashboard_Design โ”‚ โ”œโ”€โ”€ Mobile_Layout โ”‚ โ”œโ”€โ”€ User_Experience โ”‚ โ”œโ”€โ”€ Accessibility โ”‚ โ””โ”€โ”€ Performance_Friendly_Design โ”‚ โ”œโ”€โ”€ 10_Advanced_Modeling_and_Performance/ โ”‚ โ”œโ”€โ”€ Query_Performance โ”‚ โ”œโ”€โ”€ DAX_Optimization โ”‚ โ”œโ”€โ”€ Incremental_Refresh โ”‚ โ”œโ”€โ”€ Aggregation_Tables โ”‚ โ”œโ”€โ”€ Composite_Models โ”‚ โ”œโ”€โ”€ DirectQuery โ”‚ โ”œโ”€โ”€ Import_Mode โ”‚ โ”œโ”€โ”€ Hybrid_Model โ”‚ โ””โ”€โ”€ Performance_Analyzer โ”‚ โ”œโ”€โ”€ 11_PowerBI_Service_and_Deployment/ โ”‚ โ”œโ”€โ”€ Publishing_Reports โ”‚ โ”œโ”€โ”€ Workspaces โ”‚ โ”œโ”€โ”€ Apps โ”‚ โ”œโ”€โ”€ Dashboards โ”‚ โ”œโ”€โ”€ Scheduled_Refresh โ”‚ โ”œโ”€โ”€ Data_Gateway โ”‚ โ”œโ”€โ”€ Sharing_and_Permissions โ”‚ โ”œโ”€โ”€ Row_Level_Security โ”‚ โ”œโ”€โ”€ Deployment_Pipelines โ”‚ โ””โ”€โ”€ Governance โ”‚ โ”œโ”€โ”€ 12_Real_Time_and_AI_Features/ โ”‚ โ”œโ”€โ”€ Streaming_Datasets โ”‚ โ”œโ”€โ”€ Real_Time_Dashboards โ”‚ โ”œโ”€โ”€ AI_Visuals โ”‚ โ”œโ”€โ”€ Forecasting โ”‚ โ”œโ”€โ”€ Key_Influencers โ”‚ โ”œโ”€โ”€ Decomposition_Tree โ”‚ โ”œโ”€โ”€ Python_in_PowerBI โ”‚ โ”œโ”€โ”€ R_in_PowerBI โ”‚ โ””โ”€โ”€ Copilot_Features โ”‚ โ”œโ”€โ”€ 13_Fabric_and_Modern_Data_Platform/ โ”‚ โ”œโ”€โ”€ Microsoft_Fabric_Overview โ”‚ โ”œโ”€โ”€ Lakehouse โ”‚ โ”œโ”€โ”€ Warehouse โ”‚ โ”œโ”€โ”€ Dataflows_Gen2 โ”‚ โ”œโ”€โ”€ Notebooks โ”‚ โ”œโ”€โ”€ Pipelines โ”‚ โ”œโ”€โ”€ OneLake โ”‚ โ”œโ”€โ”€ Real_Time_Intelligence โ”‚ โ””โ”€โ”€ Fabric_with_PowerBI
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J.A Olaoye
J.A Olaoye@JA_Olaoyeยท
If you donโ€™t like this word โ€œWHYโ€ please leave Data Related Jobs.
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J.A Olaoye
J.A Olaoye@JA_Olaoyeยท
What I told you about using AI as a data professional is so true. AI is not taking your job. AI is making some people finally get accolades they may never have gotten before ๐Ÿ˜‚ Why? Because AI is only as good as the context, structure, and business understanding you feed into it. Two people can use the same AI tool and get completely different outcomes. One person dumps random data and gets generic answers. The other understands: - data modeling - business logic - SQL - metrics - process flow - data quality - stakeholder expectations โ€ฆthen presents the data properly. That person gets sharp insights, executive-level storytelling, and precise answers from AI. So learning the fundamentals is not a waste of time. It is the foundation for using AI efficiently. The professionals who understand the basics will use AI like a power tool. The ones skipping the basics will keep wondering why the AI output feels โ€œoff.โ€
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J.A Olaoye
J.A Olaoye@JA_Olaoyeยท
While I was away, I was using data to solve a very critical problem around port terminal congestion. AI is instrumental, yes. But the real breakthrough came from digging into the peripheral data around the terminal gate operations. That led to the development of a Gate Intelligence System that gives the traffic team early warning signals of congestion based on the classification of trucks approaching the gate. The system helps them decide when to activate: - Dedicated lanes - Mixed flow operations - Fast-track processing for truck categories that naturally process faster Think of it like the supermarket fast lane: A customer with one item should not spend 30 minutes behind someone doing bulk shopping. Thatโ€™s data thinking. Not everything is AI. Sometimes the real value is understanding operations deeply enough to know what data matters, how to model it, and when to act on it. Data is power.
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J.A Olaoye
J.A Olaoye@JA_Olaoyeยท
If youโ€™re serious about data, data modeling is non-negotiable. Why? Businesses naturally keep acquiring new systems to run their operations. Some systems integrate directly. Others never truly connect technically, but are still connected through business logic. The only way to wire these worlds together properly is through strong data modeling and a deep understanding of data grains. Without that foundation, reporting becomes inconsistent, metrics start conflicting, and trust in the data slowly breaks down. A good data model is what turns scattered systems into a single business story.
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