当前分类： 1Z0-007
问题：单选题Which SQL statement defines the FOREIGN KEY constraint on the DEPTNO column of the EMP table?（）A CREATE TABLE EMP (empno NUMBER(4), ename VARCNAR2(35), deptno NUMBER(7,2) NOT NULL CONSTRAINT emp_deptno_fk FOREIGN KEY deptno REFERENCES dept deptno);B CR...
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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：多选题Which three statements about subqueries are true?（）AA single row subquery can retrieve only one column and one row.BA single row subquery can retrieve only one row but many columns.CA multiple row subquery can retrieve multiple rows and multiple column...
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：多选题Which four are valid Oracle constraint types? （）ACASCADEBUNIQUECNONUNIQUEDCHECKEPRIMARY KEYFCONSTANTGNOT NULL...
问题：单选题Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2 (25) LAST_NAME VARCHAR2 (25) HIRE_DATE DATE Which UPDATE statement is valid? （）A UPDATE employees SET first_name = 'John' SET last_name = 'Smith' WHERE emp...
问题：多选题In which two cases would you use an outer join?（）AThe tables being joined have NOT NULL columns.BThe tables being joined have only matched data.CThe columns being joined have NULL values.DThe tables being joined have only unmatched data.EThe tables bei...
问题：Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NU...
问题：单选题Examine the structure if the EMPLOYEES table: Column name Data Type Remarks EMPLOYEE_ID NUMBER NOT NULL, Primary Key EMP_NAME VARCHAR2(30) JOB_ID VARCHAR2(20) NOT NULL SAL NUMBER MGR_ID NUMBER References EMPLOYEE_ID column DEPARTMENT_ID NUMBER Foreign ...
问题：单选题What does the TRUNCATE statement do?（）A Removes the tableB Removes all rows from a tableC Shortens the table to 10 rowsD Removes all columns from a tableE Removes foreign keys from a table...
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：Evaluate the SQL statement: 1 SELECT a.emp_name, a.sal, a.de...
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) FR...
问题：You added a PHONE_NUMBER column of NUMBER data type to an ex...
问题：Evaluate the SQL statement: SELECT ROUND(45.953, -1), TRUNC(...
问题：单选题Evaluate the SQL statement: SELECT ROUND(TRUNC(MOD(1600,10),-1),2) FROM dual; What will be displayed?（）A 0B 1C 0.00D An error statement...
问题：Evaluate the SQL statement DROP TABLE DEPT: Which four state...
问题：多选题Which four are correct guidelines for naming database tables? （）AMust begin with either a number or a letter.BMust be 1-30 characters long.CShould not be an Oracle Server reserved word.DMust contain only A-Z, a-z, 0-+, _, *, and #.EMust contain only A-...
问题：多选题Which four are types of functions available in SQL? （）AstringBcharacterCintegerDcalendarEnumericFtranslationGdateHconversion...
