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السؤال #1
Which two queries return the string Hello! we're ready?
A. SELECT q'! Hello! We're ready! 'FROM DUAL;
B. SELECT "Hello! We're ready "FROM |DUAL;
C. SELECT q'[Hello! We're ready]'FROM DUAL;
D. SELECT 'Hello! we\ re ready' ESCAPE'N'FROMDUAL:
E. SELECT 'Hello! We're ready' FROM DUAL;
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اجابة صحيحة: AC
السؤال #2
Examine the description of the EMPLOYEES table: Which two statements will run successfully?
A. SELECT 'The first_name is '' || first_name || '' FROM employees ;
B. SELECT 'The first_name is '''||first_name ||'''' FROM employees ;
C. SELECT 'The first_name is ''' ||first_name||''' FROM employees ;
D. SELECT 'The first_name is '|| first_name|| '' FROM employees;
E. SELECT 'The first_name is \'' || first_name || '\'' FROM employees;
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اجابة صحيحة: BC
السؤال #3
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 pro motion time interval. Examine this SQL statement: SELECT prod id FROM costs WHERE promo id IN (SELECT promo id FROM promotions WHERE promo_cost < ALL (SELECT MAX (promo cost) FROM promotions GROUP BY (promo_end date-promo_begin_date)) ); What will be the result?
A. It executes successfully but does not give the required result
B. It gives an error because the ALL keyword is not valid
C. It gives an error because the GROUP BY clause is not valid
D. It executes successfully and gives the required result
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اجابة صحيحة: D
السؤال #4
You execute this command: ALTER TABLE employees SET UNUSED (department_id); Which two are true?
A. A query can display data from the DEPARTMENT_ID column
B. The storage space occupied by the DEPARTMENT_ID column is released only after a COMMIT is issued
C. The DEPARTMENT_ID column is set to null for all tows in the table
D. A new column with the name DEPARTMENT_ID can be added to the EMPLOYEES table
E. No updates can be made to the data in the DEPARTMENT_ID column
F. The DEPARTMENT_ID column can be recovered from the recycle bin
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اجابة صحيحة: DE
السؤال #5
Examine the data in the EMPLOYEES table: Which statement will compute the total annual compensation for each employee?
A. SELECT last name, (monthly salary*12) + (monthly_commission_pct * 12) AS annual comp FROM employees ;
B. SELECT last_ name (monthly_ salary+ monthly_ commission _ pct) *12 AS annual_ FROM employees ;
C. SELECT last name, (monthly_ salary *12) + (monthly_ salary * 12 * NVL (monthly commission pct,0) ) As annual _ comp FROM employees;
D. SELECT last_ name, monthly_ salary*12) + (monthly_ salary * 12 * Monthly commission _Pct) AS annual_ comp FROM employees;
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اجابة صحيحة: C

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