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Oracle 1z1-071 Exam Syllabus Topics:

Section	Objectives
Topic 1: Data Manipulation and Schema Objects	- DDL operations 1. CREATE, ALTER, DROP tables and constraints - DML operations 1. INSERT, UPDATE, DELETE, MERGE
Topic 2: SQL Retrieval	- Joins and set operations 1. INNER, OUTER, CROSS joins 2. UNION, INTERSECT, MINUS - SELECT statements and filtering data 1. WHERE clause and conditions 2. ORDER BY and row limiting
Topic 3: SQL Functions	- Single-row functions 1. Character, numeric, date functions - Conversion and conditional functions 1. TO_CHAR, TO_NUMBER, CASE expressions
Topic 4: Relational Database Concepts	- Tables, rows, columns, and relational model basics - Data types and database objects overview
Topic 5: Subqueries and Advanced SQL	- Single-row and multi-row subqueries - Correlated subqueries and nested queries

>> 1z1-071熱門題庫 <<

最新的 Oracle PL/SQL Developer Certified Associate 1z1-071 免費考試真題 (Q213-Q218):

問題 #213
Table EMPLOYEES contains columns including EMPLOYEE_ID, JOB_ID and SALARY.
Only the EMPLOYEES_ID column is indexed.
Rows exist for employees 100 and 200.
Examine this statement:
UPDATE employees
SET (job_id, salary) =
(SELECT job_id, salary
FROM employees
WHERE employee_id = 200)
WHERE employee id=100;
Which two statements are true?

A. Employee 200 will have SALARY set to the same value as the SALARY of employee 100.
B. Employee 200 will have JOB_ID set to the same value as the JOB_ID of employee 100
C. Employees 100 and 200 will have the same JOB ID as before the update command.
D. Employees 100 and 200 will have the same SALARY as before the update command.
E. Employee 100 will have SALARY set to the same value as the SALARY of employee 200.
F. Employee 100 will have JOB_ID set to the same value as the JOB_ID of employee 200.

答案：E,F

問題 #214
The SALES table has columns PROD_IDand QUANTITY_SOLDof data type NUMBER.
Which two queries execute successfully? (Choose two.)

A. COUNT(*) >10;
SELECT prod_id FROM sales WHERE quantity_sold > 55000 AND COUNT(*) > 10 GROUP
B. BY prod_id HAVING COUNT(*) >10;
SELECT COUNT (prod_id) FROM sales WHERE quantity_sold > 55000 GROUP BY
C. prod_id;
SELECT prod_id FROM sales WHERE quantity_sold > 55000 AND COUNT(*) > 10 GROUP
D. BY COUNT(*) >10;
SELECT COUNT(prod_id) FROM sales GROUP BY prod_id WHERE quantity_sold > 55000;
E. SELECT prod_id FROM sales WHERE quantity_sold > 55000 GROUP BY prod_id HAVING

答案：B,E

問題 #215
Which statements is true about using functions in WHERE and HAVING?

A. using single-row functions in the WHERE clause requires a subquery
B. using aggregate functions in the HAVING clause requires a subquery
C. using aggregate functions in the WHERE clause requires a subquery
D. using single-row functions in the HAVING clause requires a subquery

答案：C

解題說明：
Single-row functions can be used in the WHERE and HAVING clauses without requiring a subquery.
However, aggregate functions, which operate on many rows to give one result per group, cannot be used in a WHERE clause unless a subquery is used because the WHERE clause is processed before the individual rows are aggregated into groups.
A). False. Single-row functions can be directly used in the WHERE clause.
B). False. Single-row functions can be directly used in the HAVING clause.
C). True. Aggregate functions cannot be used in the WHERE clause without a subquery because the WHERE clause filters individual rows before they are aggregated.
D). False. Aggregate functions are intended to be used in the HAVING clause, which is specifically for filtering groups of rows after they have been aggregated, and they do not require a subquery to be used there.

問題 #216
Examine the data in the ORD_ITEMS table:

Evaluate this query:

Which statement is true regarding the result?

A. It displays the item nos with their average quantity where the average quantity is more than double the overall minimum quantity of all the items in the table.
B. It displays the item nos with their average quantity where the average quantity is more than double the minimum quantity of that item in the table.
C. It returns an error because all the aggregate functions used in the HAVINGclause must be specified in the SELECT list.
D. It returns an error because the HAVINGclause should be specified after the GROUP BYclause.

答案：B

問題 #217
You want to display the date for the first Monday of the next month and issue the following command:

What is the outcome?

A. In generates an error because fmand double quotation marks should not be used in the format string.
B. It executes successfully and returns the correct result.
C. In generates an error because TO_CHARshould be replaced with TO_DATE.
D. In generates an error because rrrrshould be replaced by rrin the format string.
E. It executes successfully but does not return the correct result.

答案：B

問題 #218
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1z1-071熱門題庫，1z1-071指南

Oracle 1z1-071 Exam Syllabus Topics:

熱門的1z1-071熱門題庫 |高通過率的考試材料|免費PDF 1z1-071指南

最新的 Oracle PL/SQL Developer Certified Associate 1z1-071 免費考試真題 (Q213-Q218):