当前分类： 1Z0-007
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...
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问题：单选题What is true of using group functions on columns that contain NULL values?（）A Group functions on columns ignore NULL values.B Group functions on columns returning dates include NULL values.C Group functions on columns returning numbers include NULL val...
问题：Which two are attributes of /SQL*Plus? （）...
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：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：Which SQL statement returns a numeric value?（）...
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：Examine the description of the EMPLOYEES table: EMP_ID NUMBE...
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：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：You need to modify the STUDENTS table to add a primary key o...
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Which three statements about subqueries are true? （）AAsinglerowsubquerycanretrieveonlyonecolumnandonerow.BAsinglerowsubquerycanretrieveonlyonerowbutmanycolumns.CAmultiplerowsubquerycanretrievemultiplerowsandmultiplecolumns.DAmultiplerowsubquerycanbecom...
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...
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：The EMP table contains these columns: LAST NAME VARCHAR2(25)...
问题：What are two reasons to create synonyms?（）...
