最新1Z1-171考證 & 1Z1-171熱門題庫

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Oracle 1Z1-171 Exam Syllabus Topics:

Section	Objectives
Using SQL Functions	- Use character, number, and date functions in SELECT statements - Use conversion functions
Using Set Operators	- Use UNION, UNION ALL, INTERSECT, and MINUS operators
Using DML Statements	- Update rows in a table - Delete rows from a table - Use the MERGE statement - Insert rows into a table - Control transactions
Using Subqueries	- Use multiple-row subqueries - Use correlated subqueries - Use single-row subqueries
Using DDL Statements	- Create and manage views - Create and manage constraints - Create and manage sequences - Create and manage tables - Create and manage indexes
Controlling User Access	- Grant and revoke privileges - Differentiate system privileges from object privileges - Create and manage roles
Using SELECT Statements	- Use the ORDER BY clause to sort rows - Use the FETCH clause to limit rows returned - Execute a basic SELECT statement - Use the WHERE clause to restrict rows
Using Joins	- Use outer joins (LEFT, RIGHT, FULL) - Use cross joins - Use equijoins and non-equijoins - Use self-joins

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最受推薦的最新1Z1-171考證，免費下載1Z1-171考試資料幫助妳通過1Z1-171考試

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最新的 Oracle Database 1Z1-171 免費考試真題 (Q47-Q52):

問題 #47
Which of the following is true about foreign key constraints in SQL?

A. They define a relationship between two tables.
B. They ensure that a column only contains NULL values.
C. They enforce the uniqueness of values in a column.

答案：A

問題 #48
Which command revokes a user's privilege to update a table?

A. DELETE UPDATE ON table_name FROM user_name;
B. DENY UPDATE ON table_name FROM user_name;
C. REVOKE UPDATE ON table_name FROM user_name;
D. REMOVE UPDATE ON table_name FROM user_name;

答案：C

問題 #49
Which of the following data dictionary views provides information about constraints on tables?

A. DBA_CONSTRAINTS
B. All of the above
C. USER_CONSTRAINTS
D. ALL_CONSTRAINTS

答案：B

問題 #50
What does the UNION ALL operation do when selecting matching columns from different tables?
SELECT employee_id, salary FROM employees
UNION ALL
SELECT employee_id, bonus FROM bonuses;

A. Combines all employee IDs, salaries, and bonuses, including duplicates
B. Returns only the employees with salaries and bonuses
C. Combines the salaries and bonuses for employees, removing duplicates
D. Returns only employees with duplicate employee IDs in both tables

答案：A

問題 #51
What does the EXISTS operator check in a subquery?

A. If the subquery returns any rows
B. If the subquery returns a specific number of rows
C. If the subquery contains only unique values
D. If the subquery references the outer query

答案：A

問題 #52
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