DBA Corner focuses on issues of interest to data architects, database analysts and database administrators. Issues addressed by the column include data modeling and database design, database implementation, DBA practices and procedures, performance management and tuning, application development, optimization techniques, data governance, regulatory compliance with regard to data, and industry trends.
The optimizer is the heart and soul of a relational DBMS. It analyzes SQL statements and determines the most efficient access plan for satisfying each statement. The optimizer accomplishes this by parsing the SQL statement to determine which tables and columns must be accessed. It then queries system information and statistics stored in the system catalog and directory to determine the best method of accomplishing the tasks necessary to satisfy the request.
Posted February 15, 2009
Staffing the DBA organization is not a simple matter. Several non trivial considerations must be addressed, including the size of the DBA staff and the reporting structure for the DBAs.
Posted January 15, 2009
As per my regular custom, this final column of the year will take a look back at the most significant data and database-related events of the year.
Posted December 15, 2008
Posted September 15, 2008