问题：多选题In which four clauses can a subquery be used?（）Ain the INTO clause of an INSERT statementBin the FROM clause of a SELECT statementCin the GROUP BY clause of a SELECT statementDin the WHERE clause of a SELECT statementEin the SET clause of an UPDATE sta...
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问题：单选题What is true about sequences? （）A Once created, a sequence belongs to a specific schema.B Once created, a sequence is linked to a specific table.C Once created, a sequence is automatically available to all users.D Only the DBA can control which sequenc...
问题：Which one is a system privilege? （）...
问题：单选题What is necessary for your query on an existing view to execute successfully?（）A The underlying tables must have data.B You need SELECT privileges on the view.C The underlying tables must be in the same schema.D You need SELECT privileges only on the u...
问题：单选题In which scenario would an index be most useful?（）A The indexed column is declared as NOT NULL.B The indexed columns are used in the FROM clause.C The indexed columns are part of an expression.D The indexed column contains a wide range of values....
问题：多选题Evaluate the SQL statement DROP TABLE DEPT; Which four statements are true of the SQL statement? （）AYou cannot roll back this statement.BAll pending transactions are committed.CAll views based on the DEPT table are deleted.DAll indexes based on the DEP...
问题：单选题Management has asked you to calculate the value 12*salary* commission_pct for all the employees in the EMP table. The EMP table contains these columns: LAST NAME VARCNAR2(35) NOT NULL SALARY NUMBER(9,2) NOT NULL COMMISION_PCT NUMBER(4,2) Which statemen...
问题：Which two are attributes of /SQL*Plus? （）...
问题：多选题Evaluate the SQL statement: TRUNCATE TABLE DEPT; Which three are true about the SQL statement? （）AIt releases the storage space used by the table.BIt does not release the storage space used by the table.CYou can roll back the deletion of rows after the...
问题：单选题The EMPLOYEES table contains these columns: EMPLOYEE_ID NUMBER(4) LAST_NAME VARCHAR2 (25) JOB_ID VARCHAR2(10) You want to search for strings that contain 'SA_' in the JOB_ID column. Which SQL statement do you use?（）A SELECT employee_id, last_name, job_...
问题：单选题Which SQL statement accepts user input for the columns to be displayed, the table name, and WHERE condition? （）A SELECT 1, 2 FROM 3 WHERE last_name = '8';B SELECT 1, '2' FROM 3 WHERE ' last_name = '8';C SELECT 1, 2 FROM 3 WHERE last_name = '8';D SELECT...
问题：多选题Which three are DATETIME data types that can be used when specifying column definitions? （）ATIMESTAMPBINTERVAL MONTH TO DAYCINTERVAL DAY TO SECONDDINTERVAL YEAR TO MONTHETIMESTAMP WITH DATABASE TIMEZONE...
问题：单选题Which SELECT statement should you use to extract the year from the system date and display it in the format "1998"? （）A SELECT TO_CHAR(SYSDATE,'yyyy') FROM dual;B SELECT TO_DATE(SYSDATE,'yyyy') FROM dual;C SELECT DECODE(SUBSTR(SYSDATE, 8), 'YYYY') FROM...
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：You need to design a student registration database that cont...
问题：多选题Examine the data in the EMPLOYEES table: LAST_NAME DEPARTMENT_ID SALARY Getz 10 3000 Davis 20 1500 Bill 20 2200 Davis 30 5000 ... Which three subqueries work? （）ASELECT * FROM employees where salary (SELECT MIN(salary) FROM employees GROUP BY departme...
问题：The CUSTOMERS table has these columns: CUSTOMER_ID NUMBER(4)...
问题：单选题The STUDENT_GRADES table has these columns: STUDENT_ID NUMBER(12) SEMESTER_END DATE GPA NUMBER(4,3) Which statement finds the highest grade point average (GPA) per semester?（）A SELECT MAX (gpa) FROM student _ grades WHERE gpa IS NOT NULL;B SELECT (gpa)...
问题：单选题Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables: EMPLOYEES EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE NEW_EMPLOYEES EMPLOYEE_ID NUMBER Primary Key NAME VARCHAR2 (60) Which DELETE stateme...
