I’m Adewale Idowu Victor, a Data & Operations Analyst.
I help organizations analyze data, improve processes, and build dashboards that turn messy information into clear, actionable insights.
#DataAnalytics#BusinessAnalysis#Operations
I think I understand why they worship Mbappé in France 🇫🇷
Was having an absolute stinker in the first half only to turn it around in the last 10 mins, at wish.
🚫 NEVER Use COUNT to Check for Existence
If you just want to confirm if a particular item exists in your data, do not use COUNT() with a filter (WHERE clause).
SELECT COUNT(*)
FROM users
WHERE email = 'https://t.co/wNujS3iRKR'
The problem is that COUNT(*) answers a different question. It counts the number of rows that meet the condition, even though you only want to know if at least one exists.
When you use COUNT(*), the database may scan all matching rows to compute the total. Even if it finds one match immediately, it can keep going because you asked for a full count. That’s unnecessary work if you are dealing with large tables.
Instead of using COUNT(), use EXISTS
SELECT EXISTS (
SELECT 1
FROM users
WHERE email = 'https://t.co/wNujS3iRKR'
);
👑 With EXISTS, the database will stop as soon as it finds the first match. No counting. No extra scanning.
Big lesson:
Stop building generic dashboards.
Nobody pays for a “dashboard.”
They pay for the system that explains why a problem exists.
Operations + Data + Finance = Real asset insight.
In many facilities and real estate portfolios, operations happen daily:
• inspections
• maintenance
• complaints
• service
• upgrades
But the data behind these activities is often scattered.
Emails
WhatsApp
Maintenance Logs
Random spreadsheets
Which means insight gets lost
@emmanuelbasy Communication is a critical part of any data related role and any role at all. Being able to clearly explain your thinking/approach is important as having the technical skills, especially in situations where you’re not directly asked to demonstrate them 👌