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In SQL Server there is two schemas for metadata:
I have heard that INFORMATION_SCHEMA tables are based on ANSI standard. When developing e.g. stored procedures, should it be wise to use INFORMATION_SCHEMA tables over sys tables?
I would always try to use the
Information_schemaviews over querying thesysschema directly.The Views are ISO compliant so in theory you should be able to easily migrate any queries across different RDBMS.
However, there have been some cases where the information that I need is just not available in a view.
I’ve provided some links with further information on the views and querying a SQL Server Catalog.
http://msdn.microsoft.com/en-us/library/ms186778.aspx
http://msdn.microsoft.com/en-us/library/ms189082.aspx