Introduction to Database System A key: can only be one column. identifies a row. must always be composed of two or more columns. identifies a column. can only be one column. identifies a row. must always be composed of two or more columns. identifies a column. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System An identifier typically uses more than one attribute. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In a large DBMS each user can access every sub¬schema all of the listed here each user can "see" only a small part of the entire database each subschema contains every field in the logical schema each user can access every sub¬schema all of the listed here each user can "see" only a small part of the entire database each subschema contains every field in the logical schema ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System If the record management system allows you to edit values before they are recorded on disk, you can change the width of a field correct spelling changes before they are recorded change the name of a field All of the listed here change the width of a field correct spelling changes before they are recorded change the name of a field All of the listed here ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A data dictionary is a special file that contains All of these None of these the data types of all fields in all files the names of all fields in all files the widths of all fields in all files All of these None of these the data types of all fields in all files the names of all fields in all files the widths of all fields in all files ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The modify operation is likely to be done after Look-up None of these Delete All of these Insert Look-up None of these Delete All of these Insert ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS