当前分类： 1Z0-007
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, ...
查看答案
问题：单选题You need to design a student registration database that contains several tables storing academic information. The STUDENTS table stores information about a student. The STUDENT_GRADES table stores information about the student's grades. Both of the tab...
问题：单选题Evaluate the set of SQL statements: CREATE TABLE dept (deptno NUMBER(2), dname VARCHAR2(14), loc VARCHAR2(13)); ROLLBACK; DESCRIBE DEPT What is true about the set?（）A The DESCRIBE DEPT statement displays the structure of the DEPT table.B The ROLLBACK s...
问题：单选题Which substitution variable would you use if you want to reuse the variable without prompting the user each time? （）A B ACCEPTC PROMPTD...
问题：单选题Which clause should you use to exclude group results?（）A WHEREB HAVINGC RESTRICTD GROUP BYE ORDER BY...
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Which operator can be used with a multiple-row subquery?（）A =B LIKEC BETWEEND NOT INE ISF...
问题：Which operator can be used with a multiple-row subquery? （）...
问题：单选题Which best describes an inline view?（）A a schema objectB a subquery that can contain an ORDER BY clauseC another name for a view that contains group functionsD a subquery that is part of the FROM clause of another query...
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In which case would you use a FULL OUTER JOIN? （）A Both tables have NULL values.B You want all unmatched data from one table.C You want all matched data from both tables.D You want all unmatched data from both tables.E One of the tables has more data t...
问题：单选题Examine the structure of the EMPLOYEES and DEPARTMENTS tables: EMPLOYEESColumn name Data type Remarks EMPLOYEE_ID NUMBER NOT NULL, Primary Key EMP_NAME VARCHAR2 (30) JOB_ID VARCHAR2 (20) SALARY NUMBER MGR_ID NUMBER References EMPLOYEE_ID COLUMN DEPARTM...
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：单选题The CUSTOMERS table has these columns: CUSTOMER_ID NUMBER(4) NOT NULL CUSTOMER_NAME VARCHAR2(100) NOT NULL STREET_ADDRESS VARCHAR2(150) CITY_ADDRESS VARCHAR2(50) STATE_ADDRESS VARCHAR2(50) PROVINCE_ADDRESS VARCHAR2(50) COUNTRY_ADDRESS VARCHAR2(50) POST...
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 are DML statements? （）ACOMMITBMERGECUPDATEDDELETEECREATEFDROP......
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：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：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...
