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Oracle Database SQL Sample Questions (Q228-Q233):

NEW QUESTION # 228
You issue the following command to drop the PRODUCTStable:
SQL > DROP TABLE products;
Which three statements are true about the implication of this command? (Choose three.)

  • A. A pending transaction in the session is committed.
  • B. All data in the table is deleted but the table structure remains.
  • C. All data along with the table structure is deleted.
  • D. All views and synonyms on the table remain but they are invalidated.
  • E. All indexes on the table remain but they are invalidated.

Answer: A,C,D

Explanation:
Explanation


NEW QUESTION # 229
The BOOKS_TRANSACTIONStable exists in your database.
Examine the SQL statement:
SQL>SELECT * FROM books_transactionsORDER BY 3;
What is the outcome on execution?

  • A. Rows are displayed in the order that they are stored in the table only for the three rows with the lowest values in the key column.
  • B. Rows are displayed sorted in ascending order of the values in the third column in the table.
  • C. The execution tails unless the numeral 3 in the order by clause is replaced by a column name,
  • D. Rows are displayed in the order that they are stored in the table only for the first three rows.

Answer: D


NEW QUESTION # 230
Examine the following query:
SQL> SELECT prod_id, amount_sold
FROM sales
ORDER BY amount_sold
FETCH FIRST 5 PERCENT ROWS ONLY;
What is the output of this query?

  • A. It displays 5 percent of the products with the highest amount sold.
  • B. It results in an error because the ORDER BYclause should be the last clause.
  • C. It displays the first 5 percent of the rows from the SALEStable.
  • D. It displays 5 percent of the products with the lowest amount sold.

Answer: D

Explanation:
Explanation
Explanation/Reference:
References:
https://oracle-base.com/articles/12c/row-limiting-clause-for-top-n-queries-12cr1


NEW QUESTION # 231
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 FOREIGN KEY in SALES table and then delete the rows.
  • B. Disable the primary key in the STORES table.
  • C. Use CASCADE keyword with DELETE statement.
  • D. DELETE the rows with STORE_ID = 900 from the SALES table and then delete rows from STORES table.
  • E. Create the foreign key in the SALES table on SALES_ID column with on DELETE CASCADE option.

Answer: A,D,E


NEW QUESTION # 232
View the Exhibit and examine the structure of the SALES and PRODUCTS tables. (Choose two.)

In the SALES table, PROD_ID is the foreign key referencing PROD_ID in the PRODUCTS table. You must list each product ID and the number of times it has been sold.
Examine this query which is missing a JOIN operator:
SQL > SELECT p.prod_id, count(s.prod_id)
FROM products p ______________ sales s
ON p.prod_id = s.prod_id
GROUP BY p.prod_id;
Which two JOIN operations can be used to obtain the required output?

  • A. RIGHT OUTER JOIN
  • B. LEFT OUETR JOIN
  • C. JOIN
  • D. FULL OUTER JOIN

Answer: B,D


NEW QUESTION # 233
......

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