Assume that an application creates a new table every month. The table name can be coined using some pattern, like sales0501, sales0502,, etc.
To identify whether a particular table exists in a database, the following query can be used in the application:
"select name from sysobjects where xtype='u' and name = @tblName"
@tblName is the table name to be searched in the database and @tblName is the input parameter for the query.