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Oracle 1z1-071 Exam Syllabus Topics:

Section	Weight	Objectives
Managing Views		- Updatable and read-only views - Create, modify and drop views
Retrieving Data Using SQL SELECT Statement	20%	- SELECT statement syntax and usage - Column aliases, concatenation, literals and DISTINCT - Arithmetic operations and NULL handling
Restricting and Sorting Data	15%	- Substitution variables, DEFINE and VERIFY commands - ORDER BY clause and sorting rules - WHERE clause and filtering conditions - Operator precedence
Using Single-Row Functions to Customize Output	20%	- Character, number, and date functions - Nested functions usage
Using Data Dictionary Views		- Retrieve metadata and object information
Displaying Data from Multiple Tables	15%	- Equijoins and non-equijoins - Self-joins and outer joins - Cartesian products
Controlling User Access		- Roles, granting and revoking privileges - System and object privileges
Using SET Operators		- UNION, UNION ALL, INTERSECT, MINUS operators - Ordering results with set operations
Aggregating Data Using Group Functions	10%	- Handling NULLs in group functions - SUM, AVG, COUNT, MAX, MIN functions - GROUP BY and HAVING clauses
Using Subqueries to Solve Queries		- Correlated subqueries for update/delete - Single-row and multi-row subqueries
Relational Database Concepts	10%	- Theoretical and physical aspects of relational databases - ERD and SQL statement mapping - Relationship between database and SQL
Managing Tables and Constraints		- Temporary and external tables - Data types, creating/altering/dropping tables - Constraints: primary key, foreign key, unique, check, not null
Manipulating Data and Managing Transactions		- Transaction control: COMMIT, ROLLBACK, SAVEPOINT - INSERT, UPDATE, DELETE, MERGE statements - Multi-table inserts
Managing Indexes, Synonyms and Sequences		- Create and use synonyms - Create and maintain indexes - Create and use sequences
Working with Time Zones and Date/Time Data		- Time zone conversion functions - TIMESTAMP, INTERVAL data types
Conversion Functions and Conditional Expressions	10%	- TO_CHAR, TO_NUMBER, TO_DATE functions - Implicit and explicit data type conversion - NVL, NULLIF, COALESCE and CASE expressions

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最新的 Oracle PL/SQL Developer Certified Associate 1z1-071 免費考試真題 (Q331-Q336):

問題 #331
Examine the structure of the EMPLOYEES table.

You must display the maximum and minimum salaries of employees hired 1 year ago.
Which two statements would provide the correct output? (Choose two.)

A. SELECT MIN(Salary), MAX(salary)FROM (SELECT salary FROMemployeesWHERE hire_date < SYSDATE-365);
B. SELECT minsal, maxsalFROM (SELECT MIN(salary) minsal, MAX(salary) maxsalFROM employeesWHERE hire_date < SYSDATE-365GROUP BY MIN(salary), MAX(salary));
C. SELECT minsal, maxsalFROM (SELECT MIN(salary) minsal, MAX(salary) maxsalFROM employeesWHERE hire_date < SYSDATE-365)GROUP BY maxsal, minsal;
D. SELECT MIN(Salary) minsal, MAX(salary) maxsalFROM employeesWHERE hire_date < SYSDATE-365GROUP BY MIN(salary), MAX(salary);

答案：A,C

問題 #332
Examine this query:
SELECT TRUNC (ROUND(156.00,-2),-1) FROM DUAL; What is the result?

A. 0
B. 1
C. 2
D. 3
E. 4

答案：A

解題說明：
The query uses two functions: ROUND and TRUNC. The ROUND function will round the number 156.00 to the nearest hundred because of the -2 which specifies the number of decimal places to round to. This will result in 200. Then the TRUNC function truncates this number to the nearest 10, due to the -1 argument, which will give us 200 as the result since truncation does not change the rounded value in this case.
A . 16 (Incorrect)
B . 160 (Incorrect)
C . 150 (Incorrect)
D . 200 (Incorrect)
E . 100 (Incorrect)

問題 #333
Which two statements are true regarding single row functions? (Choose two.)

A. INSTR : can be used to find only the first occurrence of a character in a string.
B. TRUNC : can be used with NUMBER and DATE values.
C. SYSDATE : returns the database server current date and time.
D. CONCAT : can be used to combine any number of values.
E. TRIM : can be used to remove all the occurrences of a character from a string.
F. MOD : returns the quotient of a division.

答案：B,C

解題說明：
Explanation

問題 #334
Which three statements are true regarding indexes? (Choose three.)

A. A UNIQUE index can be altered to be non-unique
B. A table belonging to one user can have an index that belongs to a different user
C. When a table is dropped and is moved to the RECYCLE BIN, all indexes built on that table are permanently dropped
D. An update to a table can result in no updates to any of the table's indexes
E. An update to a table can result in updates to any or all of the table's indexes
F. A SELECT statement can access one or more indices without accessing any tables

答案：C,D,F

問題 #335
View the Exhibit and examine the structure of the BOOKStable.

The BOOKS table contains details of 100 books.
Examine the commands executed and their outcome:

Which statement is true?

A. The first rollback restores the 101 rows that were deleted and the second rollback causes the row was inserted to be deleted and commits the changes.
B. Both ROLLBACKcommands restore the 100 rows that were deleted.
C. The first rollback restores the 100 rows that were deleted and the second rollback commits only the changes.
D. Both ROLLBACKcommands restore the 101 rows that were deleted.

答案：A

問題 #336
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