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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL 認定 1z1-071 試験問題 (Q392-Q397):

質問 # 392
You execute this command:
TRUNCATE TABLE dept;
Which two are true?

A. It retains the integrity constraints defined on the table.
B. A FLASHBACK TABLE statement can be used to retrieve the deleted data.
C. A ROLLBACK statement can be used to retrieve the deleted data.
D. It retains the indexes defined on the table.
E. It drops any triggers defined on the table.
F. It always retains the space used by the removed rows.

正解：A、D

質問 # 393
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. Both ROLLBACKcommands restore the 101 rows that were deleted.
D. The first rollback restores the 100 rows that were deleted and the second rollback commits only the changes.

正解：A

質問 # 394
Which two statements are true regarding non equijoins?

A. The Oracle join syntax can be used.
B. Table aliases must be used.
C. The USING clause can be used.
D. The ON clause can be used.
E. The SQL:1999 compliant ANSI join syntax must be used.

正解：A、D

解説：
Non-equi joins are joins where the join condition is based on something other than equality. In Oracle SQL, you can perform non-equi joins using various clauses:
* A. The ON clause can be used: True, the ON clause can specify any condition for the join, including non-equijoins. It is not limited to equijoins.
* E. The Oracle join syntax can be used: The traditional Oracle join syntax, which uses the WHERE clause to specify the join condition, can be used for all types of joins, including non-equijoins.
References:
* Oracle Database SQL Language Reference 12c, especially the sections on join clauses including the ON clause and Oracle's proprietary join syntax.

質問 # 395
View the exhibit and examine the structure of the PROMOTIONS table.

You have to generate a report that displays the promo name and start date for all promos that started after the last promo in the 'INTERNET' category.
Which query would give you the required output?

A. SELECT promo_name, promo_begin_date FROM promotions
WHERE promo_begin_date IN (SELECT promo_begin_date
FROM promotions
WHERE promo_category= `INTERNET');
B. SELECT promo_name, promo_begin_date FROM promotions
WHERE promo_begin_date> ALL (SELECT MAX (promo_begin_date) FROM promotions) AND promo_category= `INTERNET';
C. SELECT promo_name, promo_begin_date FROM promotions
WHERE promo_begin_date> ANY (SELECT promo_begin_date
FROM promotions
WHERE promo_category= `INTERNET');
D. SELECT promo_name, promo_begin_date FROM promotions
WHERE promo_begin_date > ALL (SELECT promo_begin_date
FROM promotions
WHERE promo_category = `INTERNET');

正解：D

質問 # 396
Examine the create table statements for the stores and sales tables.
SQL> CREATE TABLE stores(store_id NUMBER(4) CONSTRAINT store_id_pk PRIMARY KEY, store_name VARCHAR2(12), store_address VARCHAR2(20), start_date DATE); SQL> CREATE TABLE sales(sales_id NUMBER(4) CONSTRAINT sales_id_pk PRIMARY KEY, item_id NUMBER(4), quantity NUMBER(10), sales_date DATE, store_id NUMBER(4), CONSTRAINT store_id_fk FOREIGN KEY(store_id) REFERENCES stores(store_id)); You executed the following statement:
SQL> DELETE from stores
WHERE store_id=900;
The statement fails due to the integrity constraint error:
ORA-02292: integrity constraint (HR.STORE_ID_FK) violated
Which three options ensure that the statement will execute successfully?

A. Disable the primary key in the STORES table.
B. Create the foreign key in the SALES table on SALES_ID column with on DELETE CASCADE option.
C. DELETE the rows with STORE_ID = 900 from the SALES table and then delete rows from STORES table.
D. Disable the FOREIGN KEY in SALES table and then delete the rows.
E. Use CASCADE keyword with DELETE statement.

正解：B、C、D

質問 # 397
......

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