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Download Oracle Database SQL Exam Dumps
NEW QUESTION 23
Which three statements are true? (Choose three.)
- A. The data dictionary is created and maintained by the database administrator.
- B. Both USER_OBJECTS and CAT views provide the same information about all objects that are owned by the user.
- C. Views with the same name but different prefixes, such as DBA, ALL and USER, reference the same base tables from the data dictionary.
- D. Data dictionary views consist of joins of dictionary base tables and user-defined tables.
- E. The usernames of all users including database administrators are stored in the data dictionary.
- F. The USER_CONS_COLUMNS view should be queried to find the names of columns to which constraints apply.
Answer: C,E,F
Explanation:
References:
https://docs.oracle.com/cd/B10501_01/server.920/a96524/c05dicti.htm
NEW QUESTION 24
Which two are true about external tables that use the ORACLE_DATAPUMPaccess driver? (Choose two.)
- A. When creating an external table, data can be selected from another external table or from a table whose rows are stored in database blocks.
- B. Creating an external table creates a directory object.
- C. When creating an external table, data can be selected only from a table whose rows are stored in database blocks.
- D. Creating an external table creates a dump file that can be used by an external table in the same or a different database.
- E. Creating an external table creates a dump file that can be used only by an external table in the same database.
Answer: A,B
Explanation:
The external tables feature is a complement to existing SQL*Loader functionality. It enables you to access data in external sources as if it were in a table in the database.
You must create the directory object before you create the external table.
Reference: https://docs.oracle.com/cd/B19306_01/server.102/b14215/et_concepts.htm
https://docs.oracle.com/cd/E11882_01/server.112/e22490/et_concepts.htm#SUTIL011
NEW QUESTION 25
Which three SQL statements would display the value 1890.55 as $1,890.55? (Choose three.)
- A. SELECT TO_CHAR (1890.55, '$99G999D00')
FROM DUAL - B. SELECT TO_CHAR (1890.55, '$99,999D99')
FROM DUAL; - C. SELECT TO_CHAR (1890.55, '$9,999V99')
FROM DUAL; - D. SELECT TO_CHAR (1890.55, '$0G000D00')
FROM DUAL; - E. SELECT TO_CHAR (1890.55, '$99G999D99')
FROM DUAL
Answer: A,D,E
NEW QUESTION 26
View the exhibit and examine the structure of the CUSTOMERS table.
Which two tasks would require subqueries or joins to be executed in a single statement? (Choose two.)
- A. listing of customers who do not have a credit limit and were born before 1980
- B. finding the number of customers, in each city, whose credit limit is more than the average credit limit of all the customers
- C. finding the number of customers, in each city, whose marital status is 'married'.
- D. finding the average credit limit of male customers residing in 'Tokyo' or 'Sydney'
- E. listing of those customers, whose credit limit is the same as the credit limit of customers residing in the city 'Tokyo'.
Answer: B,E
NEW QUESTION 27
Examine this data in the EMPLOYERS table:
Which statement will execute successfully?
- A. SELECT dept_id, STDDEV (last_name), SUM (salary) FROM employees GROUP BY dept_id
- B. SELECT dept_id, MAX (Last_name), SUM (salary) FROM employees GROUP BY dept_id
- C. SELECT dept_id, LENGTH (last_name), SUM (salary) FROM employees GROUP BY dept_id
- D. SELECT dept_id, INSTR (last_name,'A'), SUM (salary) FROM employees GROUP BY dept_id
Answer: B
NEW QUESTION 28
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