Introduction to Database System Which command is used to select distinct subject (SUB) from the table (BOOK)? All of these SELECT DISTINCT SUB FROM BOOK SELECT ALL FROM BOOK None of these SELECT SUB FROM BOOK All of these SELECT DISTINCT SUB FROM BOOK SELECT ALL FROM BOOK None of these SELECT SUB FROM BOOK ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A top-to-bottom relationship among the items in a database is established by a Relational schema Hierarchical schema All of the listed here Network schema Relational schema Hierarchical schema All of the listed here Network schema ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A minimum cardinality is the minimum number of entity instances that may participate in a relationship instance. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System 1:1, 1:N and N:M relationships are also known as HAS-A relationships. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which command(s) is(are) used to enable/disable/drop an integrity constraint in SQL? ALTER TABLE DEFINE TABLE All of the listed here MODIFY TABLE ALTER TABLE DEFINE TABLE All of the listed here MODIFY TABLE ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A primary key is a composite key that was selected to be the main identifier for the relation. True False True False ANSWER DOWNLOAD EXAMIANS APP
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