You can capture DML operations (i.e. INSERT, UPDATE and DELETE) using TRIGGER. SELECT operations are a bit trickier. Are you using stored procedures for all data access? If so you can add rows to your AuditLog table whenever a proc that selects data is called. If you are not using stored procedures then you will need to use a Server-side Trace or Log Reader to capture SELECT operations since there is no trigger mechanism available from T-SQL that you can code against to respond to those.