Database migrations are one of the most underestimated projects in software development.
We've handled several MySQL to Microsoft SQL Server (MSSQL) migrations for clients, and each one taught us something new. Here's what you need to know if you're considering the same.
Why Do Businesses Migrate?
The most common reasons we've seen:
Enterprise requirements - Many large enterprises standardise on Microsoft SQL Server across their entire infrastructure. If you're selling to enterprise clients or integrating with enterprise systems, MSSQL compatibility becomes a requirement.
Existing IT infrastructure - Some businesses already run Windows Server environments and SQL Server licenses. Running MySQL alongside adds unnecessary complexity.
Reporting and BI tools - Microsoft's reporting and business intelligence tools integrate far more naturally with MSSQL than MySQL.
What Actually Changes
Most developers assume it's a simple export-import. It rarely is.
- Data types don't map 1:1 between MySQL and MSSQL
- Auto-increment syntax is different
- String functions have different names and behaviours
- Stored procedures need to be rewritten
- Date handling works differently
What We Do Differently
We map every table and column before touching any data. We write conversion scripts that handle edge cases. We run parallel systems - old and new - before cutting over. And we test with real data, not sample data.
A migration done wrong corrupts your data. A migration done right is invisible to your end users.
If your business is considering a database migration, don't treat it as a simple task. Get it done right the first time. KeyTech has the experience to handle it properly.*