说明组合语句(sleep 5; date)& date 的功能。
已知PROJECT(J#,JNAME,DATE),要求若没有视图或约束引用属性DATE,则删除该列,若有视图或约束引用该属性,则不删除该列。可实现上述语义的语句是______。A.DELETE TABLE PROJECT DROP DATE CASCADEB.DELETE TABLE PROJECT DROP DATE RESTRICTC.ALTER TABLE PROJECT DROP DATE CASCADED.ALTER TABLE PROJECT DROP DATE RESTRICT
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设有以下说明和定义:includeVoid main() {typedef union{long i; int k[5]; char设有以下说明和定义:#include<iostream. h>Void main() {typedef union{long i; int k[5]; char c;}DATE;struct date{iNt cat; DATE cow; double. dog;}too;DATE max;则下列语句的执行结果是( )。cout<<(sizeof(struct date)+sizeof(max))<<end1;}A.26B.52C.18D.8
设有以下说明和定义:includeVoid main() {typedef union{long i; int k[5]; char设有以下说明和定义: #include<iostream. h> Void main() { typedef union { long i; int k[5]; char c; } DATE; struct date {int cat; DATE cow; double dog; }too; DATE max; cout<<(sizeof(struct date)+sizeof(max))<<end1;}A.26B.52C.18D.8
设有以下说明和定义:typedef union{ long i;int k[5];char c; } DATE;struct date{ int cat;DATE cow;double dog; }too;DATE max;则下列语句的执行结果是______。printf("%d",sizeof (struct date) +sizeof(max));A.26B.30C.18D.8
向学生表ST中增加一个新列:出生日期(RQ),其类型为日期型。实现该功能的正确的SQL语句是______。A.APPEND TABLE RQ DATE ADD STB.APPEND TABLE RQ DATE ADD ST NOT NULLC.ALTER TABLE ST ADD RQ DATE SMALLINTD.ALTER TABLE ST ADD RQ DATE
设有以下定义: typedef union {long i;int k[5];char c,}DATE, struct date {int cat;DATE cow;double dog;}too; DATE max; 则下列语句的执行结果是( ) printf("%d",stzeof(struct date)+sizeof(max));A.25B.30C.18D.8
设有以下定义: typedef union { longi; int k[5];char c;}DATE; srtuct date { int cat;DATEcow;double dog;} too; DATE max; 则下语句的执行结果是 ( ) printf("%d,"sizeof(struct date))+size of(max));A.25B.30C.18D.8