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NEW QUESTION 40
You execute this command:
TRUNCATE TABLE depts;
Which two are true?

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

Answer: C,F

NEW QUESTION 41
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? (Choose three.)

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

Answer: B,C,E

NEW QUESTION 42
You must create a table EMPLOYEES in which the values in the columns
EMPLOYEES_ID and LOGIN_ID must be unique and not null. (Choose two.)
Which two SQL statements would create the required table?

A. CREATE TABLE employees(employee_id NUMBER CONSTRAINT emp_id_nn NOT
NULL, Login_id NUMBER CONSTRAINT login_id_nn NOT NULL,Employee_name
VARCHAR2(100),Hire_date DATE,CONSTRAINT emp_id_ukUNIQUE (employee_id,
login_id));
B. CREATE TABLE employees(employee_id NUMBER,Login_id
NUMBER,Employee_name VARCHAR2(100),Hire_date DATE,CONSTRAINT emp_id_uk
UNIQUE (employee_id, login_id);CONSTRAINT emp_id_nn NOT NULL (employee_id, login_id));
C. CREATE TABLE employees(employee_id NUMBER CONSTRAINT emp_id_pk
PRIMARY KEY, Login_id NUMBER UNIQUE, Employee_name VARCHAR2(25),Hire_date DATE);
D. CREATE TABLE employees(employee_id NUMBER,login_id
NUMBER,employee_name VARCHAR2(25),hire_date DATE,CONSTRAINT emp_id_pk
PRIMARY KEY (employee_id, login_id));
E. CREATE TABLE employees(employee_id NUMBER,Login_id
NUMBER,Employee_name VARCHAR2(100),Hire_date DATE,CONSTRAINT
emp_id_ukUNIQUE (employee_id, login_id));

Answer: A,D

NEW QUESTION 43
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 DISTINCT promo_category, promo_cost FROM promotions ORDER BY 1;
B. SELECT DISTINCT promo_cost, DISTINCT promo_category FROM promotions;
C. SELECT promo_category, DISTINCT promo_cost FROM promotions;
D. SELECT DISTINCT promo_cost, promo_category FROM promotions;

Answer: A

NEW QUESTION 44
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