28.choose the best answer Evaluate the following SQL statement: SQL> SELECT promo_id, promo_category FROM promotions WHERE promo_category = 'Internet' ORDER BY 2 DESC UNION SELECT promo_id, promo_category FROM promotions WHERE promo_category = 'TV' U…

27.choose two The SQL statements executed in a user session are as follows: SQL> CREATE TABLE product (pcode NUMBER(2), pname VARCHAR2(10)); SQL> INSERT INTO product VALUES (1, 'pen'); SQL> INSERT INTO product VALUES (2,'pencil'); SQL> SAVEPOI…

26.choose two Examine the structure of the PRODUCTS table. Which two statements are true? A) EXPIRY_DATE always stores date and time in character format B) PRICE can store a maximum of eight digits and two decimals. C) PRODUCT_PIC can store only vide…

25. choose the best answer Evaluate the following SQL statement: ALTER TABLE hr.emp SET UNUSED (mgr_id); Which statement is true regarding the effect of the above SQL statement? A) Any views created on the EMP table that include the MGR_ID column wou…

24. choose the best answer In the EMPLOYEES table there are 1000 rows and employees are working in the company for more than 10 years. Evaluate the following SQL statement: SQL> UPDATE employees SET salary = NVL(salary,0) + NVL(comm,0),comm = NVL(com…

23.choose the best answer View the Exhibits and examine PRODUCTS and SALES tables. You issue the following query to display product name and the number of times the product has been sold: SQL>SELECT p.prod_name, i.item_cnt FROM (SELECT prod id, COUNT…

5.choose the best answer Evaluate the following CREATE SEQUENCE statement: CREATE SEQUENCE seq1 START WITH 100 INCREMENT BY 10 MAXVALUE 200 CYCLE NOCACHE; The sequence SEQ1 has generated numbers up to the maximum limit of 200. You issue the following…

3.choose three View the Exhibit and examine the description of SALES and PROMOTIONS tables. You want to delete rows from the SALES table, where the PROMO_NAME column in the PROMOTIONS table has either blowout sale or everyday low price as values. Whi…

20.choose two Examine the description of the EMP_DETAILS table given below: Which two statements are true regarding SQL statements that can be executed on the EMP_DETAIL table? A) You cannot add a new column to the table with LONG as the data type. B…

1.choose the best answerWhat is the primary difference between the relational database (RDB) andobject-oriented database (OODB) models?A) RDB allows the definition of relationships between different tables, whereas OODBdoes not allow this.B) OODB inc…