At what kind of scale? I don&#x27;t think any web application should have problems unless the queries are very badly designed.<p>I&#x27;ve worked with MS SQL for 10+ years (at financial institutions) with no problems. Oracle might be a tad better, but it&#x27;s also pricier. No idea about Postgre (I&#x27;ve heard it&#x27;s good), but what you mention shouldn&#x27;t be a good reason to dismiss MS SQL.