Question: Which of the following data dictionary objects should be used to view information about the constraints in a database? a. USER_TABLES b. USER_RULES c. USER_COLUMNS

Which of the following data dictionary objects should be used to view information about the constraints in a database?
a. USER_TABLES
b. USER_RULES
c. USER_COLUMNS
d. USER_CONSTRAINTS
e. None of the above objects should be used.

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