1Z1-071 RELIABLE TEST BOOK & VALID EXAM 1Z1-071 BOOK

1z1-071 Reliable Test Book & Valid Exam 1z1-071 Book

1z1-071 Reliable Test Book & Valid Exam 1z1-071 Book

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Oracle 1z0-071 exam, also known as the Oracle Database SQL exam, is a certification that validates an individual's skills in working with Oracle databases. 1z1-071 Exam is designed for individuals who work with databases and need to demonstrate their knowledge of SQL programming, database design, and data modeling concepts. Oracle Database SQL certification is recognized globally and is highly regarded in the IT industry.

Oracle Database SQL Sample Questions (Q280-Q285):

NEW QUESTION # 280
Examine the data in the COLORS table:

Examine the data in the BRICKS table:

Which two queries return all the rows from COLORS?

  • A. SELECT.
    FROM bricks b
    RIGHT JOIN colors c
    ON b. color _rgb_ hex_ value = c. rgb hex_ value;
  • B. SELECT *
    EROM bricks | b
    JOIN colors C
    ON b. color_ rgb_ hex_ value =c. rgb _hex value;
  • C. SELECT
    EROM colors C
    LEFT JOIN bricks
    USING (rgb _ hex_ value) ;
  • D. SELECT
    FROM bricks b
    FULL JOIN colors C
    ON b. color rgb _ hex_ value = c. rgb _hex_ value;
  • E. SELECT
    EROM colors C
    LEET JOIN bricks b
    ON b. color_ rgb_ hex value = c. rgb. hex.
    value
    WHERE b. brick_ id > 0;

Answer: A,C

Explanation:
The queries that will return all the rows from the COLORS table are those that ensure every record from COLORS is selected, regardless of whether there's a matching record in the BRICKS table:
* Option A:
* SELECT * FROM bricks b RIGHT JOIN colors c ON b.color_rgb_hex_value = c.rgb_hex_value;
* A right join will return all the rows from the right table (COLORS), with the matching rows from the left table (BRICKS). If there is no match, NULL will be returned for columns from BRICKS.
* Option B:
* SELECT * FROM colors c LEFT JOIN bricks b USING (rgb_hex_value);
* A left join will return all the rows from the left table (COLORS), with the matching rows from the right table (BRICKS). If there is no match, NULL will be returned for columns from BRICKS. The USING clause indicates a join condition where columns with the same names are compared for equality.
Options C, D, and E will not return all the rows from the COLORS table:
* Option C: The full join will return all rows from both tables, but it is not restricted to only the rows from COLORS.
* Option D: An inner join will return only the matching rows between both tables, not all rows from COLORS.
* Option E: This is a left join, which would typically return all rows from COLORS, but the WHERE clause restricts the result set to only those rows from COLORS that have a matching BRICK_ID in BRICKS which is greater than 0, potentially excluding rows from COLORS.


NEW QUESTION # 281
Evaluate the following query

What is the correct output of the above query?

  • A. +25-00, +54-02, +00 11:12:10.123457
  • B. +00-300, +54-02, +00 11:12:10.123457
  • C. +25-00, +00-650, +00 11:12:10.123457
  • D. +00-300, +00-650, +00 11:12:10.123457

Answer: A


NEW QUESTION # 282
Examine the data in the PRODUCTStable:

Examine these queries:

Which queries generate the same output?

  • A. 1 and 3
  • B. 1 and 2
  • C. 1, 2, and 3
  • D. 2 and 3

Answer: A

Explanation:
Explanation/Reference: https://www.dofactory.com/sql/where-any-all (statement 2 syntax in wrong)


NEW QUESTION # 283
The INVOICE table has a QTY_SOLD column of data type NUMBER and an INVOICE_DATE column of data type DATE NLS_DATE_FORMAT is set to DD-MON-RR.
Which two are true about data type conversions involving these columns in query expressions?

  • A. invoice_date> '01-02-2019': uses implicit conversion
  • B. qty_sold BETWEEN '101' AND '110': uses implicit conversion
  • C. qty_sold ='05549821 ': requires explicit conversion
  • D. CONCAT(qty_sold, invoice_date): requires explicit conversion
  • E. invoice_date = '15-march-2019': uses implicit conversion

Answer: A,E

Explanation:
The statements regarding data type conversions and the treatment of literals in SQL expressions involve understanding implicit and explicit data conversions in Oracle SQL.
* Statement A is true as invoice_date > '01-02-2019' involves an implicit conversion of the string literal to a date type, based on the NLS_DATE_FORMAT setting, assuming the format matches.
* Statement E is true because, similarly to A, invoice_date = '15-march-2019' involves an implicit conversion where the string is automatically converted to a date type according to the Oracle NLS_DATE_FORMAT or an assumed default date format.
* Statements B, C, and D involve incorrect or misleading information:
* B (qty_sold = '05549821') is misleading and potentially incorrect as leading zeros in a numeric context do not typically require explicit conversion but the presence of spaces might suggest a need for trimming rather than numeric conversion.
* C (CONCAT(qty_sold, invoice_date)) would indeed require explicit conversion because CONCAT expects string types, and thus numerical and date values must be explicitly converted
* to strings before concatenation.
* D (qty_sold BETWEEN '101' AND '110') uses implicit conversion where the string literals '101' and '110' are implicitly converted to numbers if qty_sold is a numeric type.


NEW QUESTION # 284
Examine the structure of the PROMOTIONS table:

Management requires a report of unique promotion costs in each promotion category.
Which query would satisfy this requirement?

  • A. SELECT promo_category, DISTINCT promo_cost FROM promotions;
  • B. SELECT DISTINCT promo_category, promo_cost FROM promotions ORDER BY 1;
  • C. SELECT DISTINCT promo_cost, DISTINCT promo_category FROM promotions;
  • D. SELECT DISTINCT promo_cost, promo_category FROM promotions;

Answer: B


NEW QUESTION # 285
......

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