SQL stands for Structured Query Language and is a fairly standard way of accessing databases. For the most part, a database command written in SQL will work for MS Access, MS SQL Server, Oracle, etc. The SQL Toolkit interfaces to a database via an Open Database Connectivity (ODBC) driver. One advantage of using SQL is its portability. If you ever change databases, its fairly easy to do. If you use ActiveX, moving will require that you have to start from scratch because no two database's ActiveX interface is the same (if they even have one). I've also found that the SQL Toolkit executes much faster than ActiveX. NI sells the SQL Toolkit as part of the Enterprise Connectivity Toolset which also includes SPC and Internet Toolkits for $995. Its also
sold separately for $695.