• Question 9 The ____ model is the end users ’ view of the data environment .
• Question 10 A ( n ) ____ represents a particular type of object in the real world .
• Question 11 A ( n ) ____ is anything about which data are to be collected and stored .
• Question 12 A verb associating two nouns in a business rule translates to a ( n ) ____ in the data model .
• Question 13 A ( n ) ____ is a restriction placed on the data .
• Question 14 In the ____ model , the basic logical structure is represented as an upside-down tree .
• Question 15 In the ____ model , the user perceives the database as a collection of records in 1 : M relationships , where each record can have more than one parent .
• Question 16 A noun in a business rule translates to a ( n ) ____ in the data model .
• Question 17 A ( n ) ____ join only returns matched records from the tables that are being joined .
• Question 18 A ____ is any key that uniquely identifies each row .
• Question 19 The ____ constraint can be placed on a column to ensure that every row in the table has a value for that column .
• Question 20 In an outer join , the matched pairs would be retained and any unmatched values in the other table would be left ____.
• Question 21 ____ combines all rows from two tables , excluding duplicate rows .