Microsoft's free SQL Server Express is the perfect relational database for any one on a budget. With a 1 CPU limit and 10 GB database size limit it is more than capable of handling the average user's needs. SQL Server 2012 has been out for a while and upgrading from a legacy version couldn't be easier. Here's a recent blog post I did on upgrading from SQL Server 2008 Express to SQL Server 2012 Express:
When you need quick analysis of your traffic logs you won’t find an better tool than Microsoft’s free Log Parser. With Log Parser you can read a variety of log files including the Registry and Windows event logs. It’s ease of use comes from using SQL queries against your log file. You can get your data even faster by using multiple log parser queries in a batch file.