当前分类： 1Z0-007
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...
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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Examine the structures of the EMPLOYEES and TAX tables. EMPLOYEES EMPLOYEE_ID NUMBER NOT NULL, Primary Key EMP_NAME VARCHAR2 (30) JOB_ID VARCHAR2 (20) SALARY NUMBER References MGR_ID NUMBER EMPLOYEE_ID column DEPARTMENT_ID NUMBER Foreign key to DEPARTM...
问题：单选题A data manipulation language statement （）.A completes a transaction on a tableB modifies the structure and data in a tableC modifies the data but not the structure of a tableD modifies the structure but not the data of a table...
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：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：多选题Which two statements about subqueries are true? （）AA single row subquery can retrieve data from only one table.BA SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's F...
问题：The DBA issues this SQL command: CREATE USER scott IDENTIFIE...
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：单选题Evaluate these two SQL statements: SELECT last_name, salary , hire_date FROM EMPLOYEES ORDER BY salary DESC; SELECT last_name, salary , hire_date FROM EMPLOYEESORDER BY 2 DESC; What is true about them?（）A The two statements produce identical results.B ...
问题：Examine the statement:Create synonym emp for hr. employees;W...
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 th...
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：Which operator can be used with a multiple-row subquery? （）...
问题：单选题Click the Exhibit button and examine the data in the EMPLOYEES and DEPARTMENTS tables.You want to retrieve all employees, whether or not they have matching departments in the departments table. Which query would you use?（）A SELECT last_name, department...
问题：Evaluate the SQL statement: 1 SELECT a.emp_name, a.sal, a.de...
问题：Evaluate this SQL statement: SELECT ename, sal, 12*sal+100 F...
问题：单选题You need to perform these tasks: 1. Create and assign a MANAGER role to Blake and Clark 2. Grant CREATE TABLE and CREATE VIEW privileges to Blake and Clark Which set of SQL statements achieves the desired results? （）A CREATE ROLE manager; GRANT create ...
