Describe the use of keys in a database. Can you have more than one key? Explain.Question:Describe the use of keys in a database. Can you have more than one key? Explain.Keys in a databaseA key is an set of data
Foreign Keys:A database table must have a primary key and may also have foreign keys. When a database is normalized the data will appear only once in one table and will not be duplicated in another table.Answer and Explanation: Become a member a...
the statistical data may include the number of pages that contain rows of the table, the number of rows and columns in the table, as well as various other statistical data. The statistics are typically derived from the RDBMS "catalog," which is an object that describes the entire database....