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Oracle 1z1-071 exam covers a broad range of topics, including SQL, data manipulation, data control language, data definition language, and basic database concepts. Candidates are expected to have a good understanding of SQL and be able to perform basic database operations. 1z1-071 Exam also tests the candidate's ability to use SQL to retrieve and manipulate data from Oracle databases.

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Oracle 1z1-071 certification exam is designed for individuals who want to prove their expertise in using SQL to manage Oracle databases. 1z1-071 exam is intended for database administrators, developers, and other IT professionals who work with Oracle databases on a regular basis. 1z1-071 Exam covers a wide range of topics related to SQL, including data retrieval, data manipulation, data definition, and schema objects.

Oracle Database SQL Sample Questions (Q238-Q243):

NEW QUESTION # 238
Examine this SELECT statement and view the Exhibit to see its output:

SELECT constraints_name, constraints_type, search_condition, r_constraints_name, delete_rule, status, FROM user_constraints WHERE table_name = 'ORDERS'; Which two statements are true about the output? (Choose two.)

A. In the second column, 'c' indicates a check constraint.
B. The STATUS column indicates whether the table is currently in use.
C. The R_CONSTRAINT_NAME column contains an alternative name for the constraint.
D. The DELETE_RULE column indicates the desired state of related rows in the child table when the corresponding row is deleted from the parent table.

Answer: A,D

NEW QUESTION # 239
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. Use CASCADE keyword with DELETE statement.
B. Create the foreign key in the SALES table on SALES_ID column with on DELETE CASCADE option.
C. Disable the primary key in the STORES table.
D. DELETE the rows with STORE_ID = 900 from the SALES table and then delete rows from STORES table.
E. Disable the FOREIGN KEY in SALES table and then delete the rows.

Answer: B,D,E

Explanation:
Explanation/Reference:

NEW QUESTION # 240
Which two statements are true regarding constraints? (Choose two.)

A. A foreign key column cannot contain NULLS.
B. All constraints can be defined at the column level and at the table level.
C. A column with the UNIQUE constraint can contain NULLS.
D. A constraint is enforced only for INSERT operations.
E. A constraint can be disabled even if the constraint column contains data.

Answer: C,E

NEW QUESTION # 241
Examine this query:
SELECT 2 FROM dual d1 CROSS JOIN dual d2 CROSS JOIN dual d3;
What is returned upon execution?

A. an error
B. 6 rows
C. 8 rows
D. 3 rows
E. 1 row
F. 0 rows

Answer: E

Explanation:
The given query is using the CROSS JOIN clause, which produces a Cartesian product of the tables involved.
The DUAL table in Oracle is a special one-row, one-column table present by default in all Oracle database installations. When you cross join the DUAL table with itself multiple times without any where clause to limit the rows, the result is a multiplication of the row count for each cross-joined instance.
Since DUAL has a single row, cross-joining it with itself any number of times will still result in a single row being returned. The SELECT 2 part of the query simply dictates that the number 2 will be the value in the column of this single row.
So, the result of this query will be one row with a single column containing the value 2.
References:
* Oracle Database SQL Language Reference 12c, especially sections on join operations and the DUAL table.

NEW QUESTION # 242
Examine this SELECT statement and view the Exhibit to see its output: (Choose two.)

SELECT constraints_name, constraints_type, search_condition, r_constraints_name, delete_rule, status, FROM user_constraints WHERE table_name = 'ORDERS'; Which two statements are true about the output?

A. In the second column, 'c' indicates a check constraint.
B. The STATUS column indicates whether the table is currently in use.
C. The R_CONSTRAINT_NAME column contains an alternative name for the constraint.
D. The DELETE_RULE column indicates the desired state of related rows in the child table when the corresponding row is deleted from the parent table.

Answer: A,D

NEW QUESTION # 243
......

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