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单选题
Given the following tables: CONTINENTS ID NAME COUNTRIES 1 Antarctica 0 2 Africa 53 3 Asia 47 4 Australia 14 5 Europe 43 6 North America 23 7 South America 12 REGION ID LOCATION 1 East 2 West How many rows would be returned using the following statement? SELECT location FROM continents, region()
A

2

B

7

C

9

D

14


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更多 “单选题Given the following tables: CONTINENTS ID NAME COUNTRIES 1 Antarctica 0 2 Africa 53 3 Asia 47 4 Australia 14 5 Europe 43 6 North America 23 7 South America 12 REGION ID LOCATION 1 East 2 West How many rows would be returned using the following statement? SELECT location FROM continents, region()A 2B 7C 9D 14” 相关考题
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考题 Given the following tables: CONTINENTS ID NAME COUNTRIES1 Antarctica 02 Africa 533 Asia 474 Australia 145 Europe 436 North America 237 South America 12REGION ID LOCATION 1 East 2 WestHow many rows would be returned using the following statement? SELECT location FROM continents, region()A.2B.7C.9D.14

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考题 New Zealand is situated about 1, 500 km ()A、north-west of AustraliaB、south-east of AustraliaC、north-east of AustraliaD、south-west of Australia

考题 There are three major routes of container transportation: Far East to North America, Far East to Europe and Mediterranean, North America to Europe and Mediterranean.

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考题 Given the following two tables: TAB1 C1 C2 1 Antarctica 2 Africa 3 Asia 4 Australia TAB2 CX CY 5 Europe 6 North America 7 South America Which of the following SQL statements will insert all rows found in table TAB2 into table TAB1?()A、INSERT INTO tab1 SELECT cx, cy FROM tab2B、INSERT INTO tab1 VALUES (tab2.cx, tab2.cy)C、INSERT INTO tab1 VALUES (SELECT cx, cy FROM tab2)D、INSERT INTO tab1 (c1, c2) VALUES (SELECT cx, cy FROM tab2)

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考题 单选题Consider the following table called EMPLOYEES: ID FIRSTNAME LASTNAME JOB LEVEL CLERK 3 If the following SQL statement is executed, how many rows will be deleted? DELETE FROM employees WHERE 1 = 1()A 0B 1C 3D 6

考题 单选题Given the following two tables: TAB1 C1 C2 1 Antarctica 2 Africa 3 Asia 4 Australia TAB2 CX CY 5 Europe 6 North America 7 South America Which of the following SQL statements will insert all rows found in table TAB2 into table TAB1?()A INSERT INTO tab1 SELECT cx, cy FROM tab2B INSERT INTO tab1 VALUES (tab2.cx, tab2.cy)C INSERT INTO tab1 VALUES (SELECT cx, cy FROM tab2)D INSERT INTO tab1 (c1, c2) VALUES (SELECT cx, cy FROM tab2)

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考题 单选题class Parent {     String one, two;  public Parent(String a, String b){     one = a;     two = b;    }  public void print(){ System.out.println(one); }    }  public class Child extends Parent {     public Child(String a, String b){     super(a,b);     }  public void print(){  System.out.println(one + " to " + two);     }  public static void main(String arg[]){     Parent p = new Parent("south", "north");     Parent t = new Child("east", "west");     p.print();     t.print();     }     }  Which of the following is correct?()A  Cause error during compilation. B  south     east C  south to north     east to west    D  south to north     east    E  south     east to west

考题 单选题In your database, all the tablespaces are locally managed. You started Recovery Manager (RMAN) using recovery catalog. The following commands are used in the process of recovering the database by using the backup control file:  In what sequence would you use this process to perform the recovery?()A 7, 2, 3, 1, 4, 6, 5B 7, 1, 3, 2, 6, 5, 4C 2, 1, 7, 6, 3, 5, 4D 2, 7, 3, 5, 1, 6, 4

考题 判断题There are three major routes of container transportation: Far East to North America, Far East to Europe and Mediterranean, North America to Europe and Mediterranean.A 对B 错

考题 单选题Examine the structure of the EMPLOYEES and DEPARTMENTS tables: EMPLOYEES EMPLOYEE_ID NUMBER DEPARTMENT_ID NUMBER MANAGER_ID NUMBER LAST_NAME VARCHAR2(25) DEPARTMENTS DEPARTMENT_ID NUMBER MANAGER_ID NUMBER DEPARTMENT_NAME VARCHAR2(35) LOCATION_ID NUMBER You want to create a report displaying employee last names, department names, and locations. Which query should you use?()A SELECT e.last_name, d. department_name, d.location_id FROM employees e NATURAL JOIN departments D USING department_id ;B SELECT last_name, department_name, location_id FROM employees NATURAL JOIN departments WHERE e.department_id =d.department_id;C SELECT e.last_name, d.department_name, d.location_id FROM employees e NATURAL JOIN departments d;D SELECT e.last_name, d.department_name, d.location_id FROM employees e JOIN departments d USING (department_id );

考题 单选题______ Pacific Ocean is ______ very large sea to the west of North and South America, and to the east of Asia and Australia.A The; aB A; theC The; theD A; a