( 难度:中等)在 SQL 语句中,与 X BETWEEN 20 AND 30 等价的表达式是A.X>=20 AND X<30B.X>20 AND X<30C.X>20 AND X<=30D.X>=20 AND X<=30E.X<=30 AND X>=20
( 难度:中等)在 SQL 语句中,与 X BETWEEN 20 AND 30 等价的表达式是
A.X>=20 AND X<30
B.X>20 AND X<30
C.X>20 AND X<=30
D.X>=20 AND X<=30
E.X<=30 AND X>=20
A.X>=20 AND X<30
B.X>20 AND X<30
C.X>20 AND X<=30
D.X>=20 AND X<=30
E.X<=30 AND X>=20
相关考题:
下列程序段执行时在屏幕上显示的结果是x1=20x2=30SET UDFPARNS TO VALUEDO test WITH xl,x27 xl,x2PROCEDURE testPARAMETERS a,bx=aa=bb=xENDPROA.30 30B.30 20C.20 20D.20 30
有以下程序:include using namespace std;class sample{private: int x; static int 有以下程序:#include <iostream>using namespace std;class sample{private: int x; static int y;public: sample(int a); static void print(sample s);};sample:: sample(int a){ x=a; y+=x;}void sample:: print(sample s){ cout<<"x="<<s. x<<",y="<<y<<end1;}int sample:: y=0;int main(){ sample s1(10); sample s2(20); sample:: print(s2); return 0;}程序运行后的输出结果是( )。A.x=10,y=20B.x=20,y=30C.x=30,y=20D.x=30,y=30
有以下程序:includeusing namespace std;class sample{private:int x;static int y; 有以下程序: #include<iostrearn> using namespace std; class sample { private: int x; static int y; public: sample (int A) ; static void print (sample s); }; sample::sample(int A) { x=a; y+=x; }A.x=10,y=20B.x=20,y=30C.x=30,y=20D.x=30,y=30
能表述"2020 And X 能表述"20<X<30或X<-100"的VB表达式是( )。A.20<X<30 And X<-100B.20<X<30 Or X<-100C.X>20 And X<30 Or X<-100D.X>20 And X<30 And X<-100
下列程序段执行时在屏幕上显示的结果是( )。 x1=20 x2=30 SET UDFPARMS TO VALUE DO TEST WITH xl,x2 ?xl,x2 PROCEDURE test PARAMETERS a,b X=a a=b b=xA.30 30B.30 20C.20 20D.20 30
运行下列程序:Private Sub Form_Click( )Dim y As Integer, x As IntegerDo Until x > 20x 运行下列程序:Private Sub Form_Click( )Dim y As Integer, x As IntegerDo Until x 20x = x + 10y = y + xIf x 20 Then Exit DoLoopPrint x, yEnd Sub单击窗体后,则在窗体上显示的结果是( )。A.10 20B.30 60C.10 30D.20 60
( 19 )下列程序段执行时在屏幕上显示的结果是x 1=20x 2=30S ET UDFPARMS TO VALUED O test WITH x1,x2?x1,x2PROCEDURE testP ARAMETERS a,bx =aa =bb =xENDPROA)30 30B)30 20C)20 20D)20 30
执行以下语句后x,y,z的值是?()Intx=10,y=20,z=30;If(xy){z=x,x=y,y=z;}A、x=20,y=30,z=30B、x=20,y=30,z=10C、x=10,y=20,z=30D、x=20,y=30,z=20
执行以下语句后x,y,z的值是()intx=10,y=20,z=30;if(xy){z=x;x=y;y=z;}A、x=10,y=20,z=30B、x=20,y=30,z=30C、x=20,y=30,z=10D、x=20,y=30,z=20
已知intx=10,y=20,z=30;以下语句,if(xy)z=x;x=y;y=z;执行后x,y,z的值是()A、x=10,y=20,z=30B、x=20,y=30,z=30C、x=20,y=30,z=10D、x=20,y=30,z=20
( 难度:中等)有语句“var x=0; while(_____) x+=2:",要使while 循环体执行10 次,空白处的循环判定式应写为:()A.x<10B.x<=10C.x<20D.x<=20