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Me vs the "Quick" Database Migration on a Big Table
Blog Summary
Five lines. Widen a column, add an index. It runs instantly locally. The five stages of a quick migration on a big production table, why it hangs, and the habits that make migrations boring again.
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Handling Money in Code: Integers, Decimals and Rounding Done Right
Blog Summary
In PHP, intval(19.99 * 100) gives you 1998. That missing unit is how money bugs start. Why floats and money don't mix, how to use minor units and DECIMAL columns, and the rounding rules that keep invoices adding up.
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Unicode and UTF-8: Why Your Text Turns Into Question Marks
Blog Summary
An Arabic name goes in, four question marks come out. Encoding bugs leave fingerprints: here's how to read them, why MySQL's utf8 isn't UTF-8, and the PHP string traps that cut letters in half.
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Database Normalization Explained With a Real Example: Tenants, Units and Contracts
Blog Summary
Every messy database starts as a spreadsheet. Take a tenancy contracts sheet through 1NF, 2NF and 3NF step by step, see the anomalies each form removes, and learn when denormalizing on purpose is the right call.
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What Building a Contract Management Module Taught Me About Data Integrity
Blog Summary
A tenancy contract looks like a five-minute table. With 2,000+ contracts in Kate PMS, it's really validation, a state machine, locks against overlapping dates, frozen signed terms and an audit trail.
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Writing SQL You Can Still Read Six Months Later
Blog Summary
Every codebase has a query everyone is afraid to touch. Formatting, honest names, CTEs, comments that explain business rules and a first look at window functions turn it into SQL anyone can follow.
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01. About Shiroz
Mohammed Shiroz
Hi, I'm Mohammed Shiroz, a software engineer and AI enthusiast from Sri Lanka who turns ideas into intelligent, real-world solutions. With over 9 years of hands-on experience, I currently lead real estate ERP development at Kate Group, a...
02. Last Posts
03.My Projects
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