当前分类： 1Z0-007
问题：多选题Which four statements correctly describe functions that are available in SQL? （）AINSTR returns the numeric position of a named character.BNVL2 returns the first non-null expression in the expression list.CTRUNCATE rounds the column, expression, or valu...
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问题：多选题Which three statements correctly describe the functions and use of constraints? （）AConstraints provide data independence.BConstraints make complex queries easy.CConstraints enforce rules at the view level.DConstraints enforce rules at the table level.E...
问题：单选题You need to modify the STUDENTS table to add a primary key on the STUDENT_ID column. The table is currently empty.Which statement accomplishes this task?（）A ALTER TABLE students ADD PRIMARY KEY student_id;B ALTER TABLE students ADD CONSTRAINT PRIMARY K...
问题：单选题Evaluate the SQL statement: 1 SELECT a.emp_name, a.sal, a.dept_id, b.maxsal 2 FROM employees a, 3 (SELECT dept_id, MAX(sal) maxsal 4. FROM employees 5 GROUP BY dept_id) b 6 WHERE a.dept_id = b.dept_id 7 AND a. asl b. maxsal; What is the result of the ...
问题：多选题Which three SELECT statements displays 2000 in the format "$2,000.00"? （）ASELECT TO CNAR(2000, '$#,###.##') FROM dual;BSELECT TO CNAR(2000, '$0,000.00') FROM dual;CSELECT TO CNAR(2000, '$9,999.00') FROM dual;DSELECT TO CNAR(2000, '$9,999.99') FROM dual...
问题：单选题Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER NOT NULL EMP_NAME VARCHAR2(30) JOB_ID VARCHAR2(20) DEFAULT 'SA_REP' SAL NUMBER COMM_PCT NUMBER MGR_ID NUMBER DEPARTMENT_ID NUMBER You need to update the records of employees 103 and 115. ...
问题：多选题Which two are true about aggregate functions? （）AYou can use aggregate functions in any clause of a SELECT statement.BYou can use aggregate functions only in the column list of the SELECT clause and in the WHERE clause of a SELECT statement.CYou can mi...
问题：多选题Examine the SQL statements that creates ORDERS table: For which columns would an index be automatically created when you execute the above SQL statement? （）ASER_NOBORDER_IDCSTATUSDPROD_IDEORD_TOTALFComposite index on ORDER_ID and ORDER_DATE...
问题：多选题Which two are true about aggregate functions?（）AYou can use aggregate functions in any clause of a SELECT statement.BYou can use aggregate functions only in the column list of the SELECT clause and in the WHERE clause of a SELECT statement.CYou can mix...
问题：单选题Evaluate the SQL statement: SELECT ROUND(45.953, -1), TRUNC(45.936, 2) FROM dual; Which values are displayed?（）A 46 and 45B 46 and 45.93C 50 and 45.93D 50 and 45.9E 45 and 45.93F 45.95 and 45.93...
问题：单选题You need to perform certain data manipulation operations through a view called EMP_DEPT_VU, which you previously created. You want to look at the definition of the view (the SELECT statement on which the view was created.) How do you obtain the definit...
问题：多选题For which two actions can you use the TO_DATE function? （）Aconvert any date literal to a dateBconvert any numeric literal to a dateCconvert any date to a character literalDformat 'January 10 1999' for inputEformat '10-JAN-99' to 'January 10 1999'...
问题：多选题Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) Which three statements inserts a row into the table? （）AINSERT INTO employees VALUES (NULL, 'JOHN','Smith');BINSERT INTO employe...
问题：单选题A SELECT statement can be used to perform these three functions: 1. Choose rows from a table. 2. Choose columns from a table 3. Bring together data that is stored in different tables by creating a link between them. Which set of keywords describes thes...
问题：单选题Which /SQL*Plus feature can be used to replace values in the WHERE clause?（）A Substitution variablesB Replacement variablesC Prompt variablesD Instead-of variablesE This feature cannot be implemented through /SQL*Plus...
问题：多选题Which two statements complete a transaction? （）ADELETE employees;BDESCRIBE employees;CROLLBACK TO SAVE POINT C;DGRANT SELECT ON employees TO SCOTHEALTER TABLE employees SET UNUSED COLUMN sal;FSelect MAX(sal) FROM employees WHERE department _ id 20;...
问题：In which scenario would an index be most useful?（）...
问题：单选题The EMPLOYEE tables has these columns: LAST_NAME VARCHAR2(35) SALARY NUMBER(8,2) COMMISSION_PCT NUMBER(5,2) You want to display the name and annual salary multiplied by the commission_pct for all employees. For records that have a NULL commission_pct, ...
问题：单选题You need to change the definition of an existing table. The COMMERCIALS table needs its DESCRIPTION column changed to hold varying length characters up to 2000 bytes. The column can currently hold 1000 bytes per value. The table contains 20000 rows. Wh...
问题：Which operator can be used with a multiple-row subquery? （）...
