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有一个判断语句 if(ch>='a'&&ch<='z'||ch>='A'&&ch<='Z') printf("This is a le...

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程序中只有a='/';语句不正确  b='/xbc';语句不正确  d="/0127";语句不正确  a='/';和 c='/0xab';语句都不正确  
A=1andB=4  A=1&&B=4  not(A<;>;1)andnot(B<;>;4)  not(A<;>;1)&¬(B<;>;4)  
('1031','曾华',男,23)  ('1031','曾华',NULL,NULL)  (NULL,'曾华','男','23')  ('1031',NULL,'男',23)  
程序中只有a=''/'';语句不正确  b=''/xbc'';语句不正确  d="/0127";语句不正确  a=''/'';和 c=''/0xab'';语句都不正确  
IN(M,  LIKE('M','F')  CHECK('M','F')  CHECK(性别IN('M','F'))  
SELECT S#,SNAME FROM S WHERE S# = (SELECT SS# FROM SC WHERE C# = 'C2' )  SELECT S#,SNAME FROM S,SCWHERE S# = SS# AND C# = 'C2'  SELECT S#,SNAME FROM S,SC WHERE S# = SS# AND C# = 'C2' ORDER BY S#  SELECT S#,SNAME FROM S WHERE S# IN (SELECT SS# FROM SC WHERE C# ='C2' )  
转移语句  输出语句  转子程序语句  条件判断语句  
SELECT*FROMCUSTOMERWHEREPRICELIKE'%500%'  SELECT*FROMCUSTOMERWHEREPRICEBETWEEN500AND*  SELECT*FROMCUSTOMERWHEREPRICE>500  SELECT *FROMCUSTOMERWHEREPRICE>=500  
break可以用于循环体内  break语句可以在for循环语句中出现多次  break语句可以在switch语句中出现多次  break语句可用于if条件判断语句内  
OPEN(UNIT=3,FILE=ADAT,STATUS=NEW)  OPEN(UNIT=3,FILE=ADAT,STATUS=OL  OPEN(3,FILE='ADAT',STATUS='NEW')  OPEN(D,FILE='ADAT',STATUS='OLD')  
gets(;  white((s[i++]=getchar())!='');s=/0;  scanf("%s",;  d0{scanf("%c",&;}while(s[i++]!='';s='/0';  
3141512>>OK!  31415120K!>>  414150K!>>  31415>>OK!  
gets(s);  white((s[i++]=getchar())!='');s[i]=/0;  scanf("%s",s);  d0scanf("%c",&s[i]);while(s[i++]!='';s[i]='/0';  
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