CMIS 320
PROJECT 4
1) Is this relation in at least 1NF? Why or why not?
Yes, it is in the first normal form, because changing the order of the data does
not change its meaning, there are no multiple values in each column, nor does it
vary the size of the columns.
2) What is the primary key of the initial relation (assume the values shown are
the only possible tuples for all time)? Remember that a primary key must be
unique and not null.
The primary key is the tuple consisting of the name of the girl and the game, ie
PK (GIRL, GAME).
3) Describe the specific data anomalies that exist we DELETE the tuple
containing Jacqueline.
When DELETE the tuple conformed by Jacqueline, we no longer have an
occurrence of a specific CATEGORY and we will not have a way of detailing
how many categories we have for the games and to add new registers to the
table.
pg. 1
PROJECT 4
1) Is this relation in at least 1NF? Why or why not?
Yes, it is in the first normal form, because changing the order of the data does
not change its meaning, there are no multiple values in each column, nor does it
vary the size of the columns.
2) What is the primary key of the initial relation (assume the values shown are
the only possible tuples for all time)? Remember that a primary key must be
unique and not null.
The primary key is the tuple consisting of the name of the girl and the game, ie
PK (GIRL, GAME).
3) Describe the specific data anomalies that exist we DELETE the tuple
containing Jacqueline.
When DELETE the tuple conformed by Jacqueline, we no longer have an
occurrence of a specific CATEGORY and we will not have a way of detailing
how many categories we have for the games and to add new registers to the
table.
pg. 1
