So, you're asked to fix a database problem for a web application. The trouble is that nobody can tell you a valid database username and password—or even where the database is! You could spend hours searching the application code and tracking down everyone in your company who you think might know.
ASM makes upgrading to 10g an obvious choice for RAC databases (Oracle Database 10g)
Never hit the wrong database again in the Query window (SQL Server)
It’s easy to do. You create an object and later wonder why it’s not there. This can happen if you’re in Query Analyzer or the Query window in Microsoft SQL Server Management Studio and forget to select the correct database in the dropdown box. In some cases, you may have even selected the correct database, but if you’re working with SQL Server Express, it may connect you to the wrong database when you reconnect.
To avoid this problem, get into the habit of starting your query pages with a Use statement, such as: