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【General】 1z0-071 Printable PDF | 1z0-071 New Braindumps Files

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Oracle Database SQL Sample Questions (Q41-Q46):NEW QUESTION # 41
Examine this description of the PRODUCTS table:

Rows exist in this table with data in all the columns. You put the PRODUCTS table in read-only mode. Which three commands execute successfully on PRODUCTS?
  • A. TRUNCATE TABLE products;
  • B. ALTER TABLE products SET UNUSED(expiry_date);
  • C. ALTER TAELE products DROP COLUMN expiry_date;
  • D. ALTER TABLE products DROP UNUSED COLUMNS
  • E. CREATE INDEX price_idx on products (price);
  • F. DROP TABLE products
Answer: D,E,F
Explanation:
B . CREATE INDEX price_idx on products (price); E. ALTER TABLE products DROP UNUSED COLUMNS; F . DROP TABLE products.
Comprehensive and Detailed Explanation WITH all Reference:
When a table is in read-only mode, most types of modifications are prohibited. However, certain operations can still be performed.
A . Incorrect. You cannot drop a column from a table that is in read-only mode, as it is a modifying operation. B. Correct. You can create an index on a read-only table. Creating an index does not modify the actual rows within the table; it builds a separate structure used for faster access. C. Incorrect. The SET UNUSED statement marks one or more columns as unused so they can be dropped when the database is not busy. This operation is considered a modifying operation and therefore is not allowed on a read-only table. D. Incorrect. Truncate is a DDL operation that would delete all rows from a table. This operation is not allowed on a read-only table. E. Correct. The ALTER TABLE ... DROP UNUSED COLUMNS statement is used to drop columns that have been previously marked as unused using the SET UNUSED statement. This operation is allowed because it only affects previously marked unused columns, not actively used data. F. Correct. Dropping a table is allowed even if it's in read-only mode because it is a DDL operation that does not operate on the rows of the table but rather on the object itself.
The behavior of read-only tables and the operations that can be performed on them are detailed in the Oracle Database SQL Language Reference and Oracle Database Administrator's Guide.

NEW QUESTION # 42
View the Exhibit and examine the data in the PRODUCT_INFORMATION table.

Which two tasks would require subqueries? (Choose two.)
  • A. displaying the minimum list price for each product status
  • B. displaying the number of products whose list prices are more than the average list price
  • C. displaying all supplier IDs whose average list price is more than 500
  • D. displaying all the products whose minimum list prices are more than average list price of products having the status orderable
  • E. displaying the total number of products supplied by supplier 102071 and having product status OBSOLETE
Answer: B,D

NEW QUESTION # 43
Examine the data in the CUST_NAMEcolumn of the CUSTOMERStable.
CUST_NAME
-------------------
Renske Ladwig
Jason Mallin
Samuel McCain
Allan MCEwen
Irene Mikkilineni
Julia Nayer
You need to display customers' second names where the second name starts with "Mc" or "MC".
Which query gives the required output?
SELECT SUBSTR(cust_name, INSTR (cust_name, ' ')+1)
  • A. FROM customers
    WHERE INITCAP(SUBSTR(cust_name, INSTR (cust_name, ' ')+1))
    'Mc';
    SELECT SUBSTR(cust_name, INSTR (cust_name, ' ')+1)
  • B. FROM customers
    WHERE SUBSTR(cust_name, INSTR (cust_name, ' ')+1)
    LIKE INITCAP ('MC%');
    SELECT SUBSTR(cust_name, INSTR (cust_name, ' ')+1)
  • C. FROM customers
    WHERE INITCAP(SUBSTR(cust_name, INSTR (cust_name, ' ')+1))
    LIKE 'Mc%';
    SELECT SUBSTR(cust_name, INSTR (cust_name, ' ')+1)
  • D. FROM customers
    WHERE INITCAP(SUBSTR(cust_name, INSTR (cust_name, ' ')+1))
    INITCAP ('MC%');
Answer: C

NEW QUESTION # 44
The following are the steps for a correlated subquery, listed in random order:
* The WHERE clause of the outer query is evaluated.
* The candidate row is fetched from the table specified in the outer query.
* This is repeated for the subsequent rows of the table, till all the rows are processed.
* Rows are returned by the inner query, after being evaluated with the value from the candidate row in the outer query.
Which is the correct sequence in which the Oracle server evaluates a correlated subquery?
  • A. 2, 1, 4, 3
  • B. 2, 4, 1, 3
  • C. 4, 1, 2, 3
  • D. 4, 2, 1, 3
Answer: B
Explanation:
References:
http://rajanimohanty.blogspot.co ... lated-subquery.html

NEW QUESTION # 45
View the Exhibits and examine the structure of the COSTS and PROMOTIONS tables.
You want to display PROD_IDS whose promotion cost is less than the highest cost PROD_ID in a promotion time interval.
Examine this SQL statements:

What will be the result?
Exhibit 1.

Exhibit 2.

  • A. It gives an error because the ALL keyword is not valid
  • B. It executes successfully and gives the required result
  • C. It gives an error because the GROUP BY clause is not valid
  • D. It executes successfully but does not give the required result
Answer: B

NEW QUESTION # 46
......
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