Given that tables T1 and T2 contain the following rows: Table T1: C1 C2 5 4 5 2 5 5 Table T2: C1 C2 5 1 5 2 5 3 Which of the following queries will return only those rows that exist in T1 and not in T2?()A、SELECT * FROM T1 MINUS SELECT * FROM T2B、SELECT * FROM T1 EXCEPT SELECT * FROM T2C、SELECT * FROM T2 UNION EXCEPT SELECT * FROM T1D、SELECT * FROM T1 NOT EXISTS SELECT * FROM T2

Given that tables T1 and T2 contain the following rows: Table T1: C1 C2 5 4 5 2 5 5 Table T2: C1 C2 5 1 5 2 5 3 Which of the following queries will return only those rows that exist in T1 and not in T2?()

  • A、SELECT * FROM T1 MINUS SELECT * FROM T2
  • B、SELECT * FROM T1 EXCEPT SELECT * FROM T2
  • C、SELECT * FROM T2 UNION EXCEPT SELECT * FROM T1
  • D、SELECT * FROM T1 NOT EXISTS SELECT * FROM T2

相关考题:

( 25 )有如下模板声明:template typename T1, typename T2 class A;下列声明中,与上述声明不等价的是A ) template class T1, class T2 class A;B ) template class T1, typename T2 class A;C ) template typename T1, class T2 class A;D ) template typename T1, T2 class A;

下面不属于同一函数模板的是()。A.template t1 max(t1 a,t1 b) {…}template 下面不属于同一函数模板的是( )。A.template<class t1> t1 max(t1 a,t1 b) {…}template<class t2> t2 max(t2 a,t2 b) {…}B.template<class t1>t1 max(t1 a,t1 b){…}template<class t2>t2 max(t2 a,t2 b){…}C.template<class t1> t1 max(t1 * a,t1 * b) {…} template<class t2> t2 max(t2 a,t2 b) {…}D.template<class t1>t1 max(t1 a,t1 b){…}template<class t2>t2 max(t2 a,t2 b,t2 c){…}

Given that tables T1 and T2 contain the following rows:Table T1: C1 C2 1 4 1 3 1 2Table T2: C1 C2 1 1 1 2 1 3Which of the following queries will return only those rows that exist in both T1 and T2?() A.SELECT * FROM t1 UNION SELECT * FROM t2B.SELECT * FROM t1 UNION DISTINCT SELECT * FROM t2C.SELECT * FROM t1 INTERSECT SELECT * FROM t2D.SELECT * FROM t1 WHERE (c1,c2)= (SELECT c1,c2 FROM t2)

The datum from which the predicted heights of tides are reckoned in the tide tables is ______.A.mean low waterB.the same as that used for the charts of the localityC.the highest possible levelD.given in table three of the tide tables

(A) T1 > T2 (B) T1 = T2(C) T1 2 (D)无法确定

同一组织T1与T2值的关系是()。A、T1值大于T2值B、T1值小于T2值C、T1值等于T2值D、T1驰豫发生早于T2驰豫E、T1驰豫发生晚于T2驰豫

颈椎、颈髓MRI扫描方位最好选()A、矢状位T1、T2加权像B、矢状位T2加权像、冠状位T1加权像C、冠状位T2加权、横断位T2加权像D、矢状位T1、T2加权像、横断位T1加权像E、矢状位T1、T2加权像、横断位T2加权像

在下列模板说明中,正确的是()A、template〈typename T1,T2〉B、template〈class T1,T2〉C、template〈typename T1,typename T2〉D、template(typedef T1,typedef T2)

下面哪个调度是串行调度()。A、T1:RA.,T2:RB.,T2:WB.,T1:WA.B、B.T1:RB.,T1:WB.,T2:R,T2:WA.C、C.T1:R,T2:RB.,.T1:WA.,T2:WB.D、D.T2:R,T1:RB.,.T1:WA.,T2:WB.

高浓度顺磁造影剂对质子弛豫时间的影响为()。A、T1缩短,T2改变不大B、T1缩短,T2延长C、T1延长,T2缩短D、T1缩短,T3缩短E、T1延长,T2延长

脑脊液MRI检查是()A、短T1、短T2信号B、长T1、长T2信号C、长T1、短T2信号D、短T1、长T2信号E、等T1、等T2信号

脊髓呈()A、等T1、等T2信号B、长T1、长T2信号C、短T1、长T2信号D、长T1、短T2信号E、长T1、等T2

直角角焊接的焊脚尺寸应满足hfmin≥1.5√t1及hfmax≤1.2·t2,则t1、t2分别为()的厚度。A、t1为厚焊件,t2为薄焊件B、t1为薄焊件,t2为厚焊件C、t1、t2皆为厚焊件D、t1、t2皆为薄焊件

同一组织T与T值的关系是()A、T1值大于T2值B、T1值小于T2值C、T1值等于T2值D、T1弛豫发生早于T2弛豫E、T1弛豫发生晚于T2弛豫

高浓度顺磁对比剂对质子弛豫时间的影响为()A、T1缩短,T2改变不大B、T1缩短,T2延长C、T1延长,T2缩短D、T1缩短,T2缩短E、T1延长,T2延长

铁磁性颗粒造影剂对质子弛豫时间的影响为()A、T1缩短,T2缩短B、T1缩短,T2延长C、T1不变,T2缩短D、T2不变,T2延长E、T1延长,T2缩短

单选题Given that tables T1 and T2 contain the following rows: Table T1: C1 C2 1 4 1 3 1 2 Table T2: C1 C2 1 1 1 2 1 3 Which of the following queries will return only those rows that exist in both T1 and T2?()ASELECT * FROM t1 UNION SELECT * FROM t2BSELECT * FROM t1 UNION DISTINCT SELECT * FROM t2CSELECT * FROM t1 INTERSECT SELECT * FROM t2DSELECT * FROM t1 WHERE (c1,c2)= (SELECT c1,c2 FROM t2)

单选题在下列模板说明中,正确的是()Atemplate〈typename T1,T2〉Btemplate〈class T1,T2〉Ctemplate〈typename T1,typename T2〉Dtemplate(typedef T1,typedef T2)

单选题Consider this syntax:   MERGE INTO t1  USING t2 ON (join predicate)…..   What does the MERGE syntax do?()AIt performs a merge join of the row from T2 only if it doesn’t exist in the T1 table. BIt creates a natural join of tables T1 and T2 for all columns that have the same name. CIt creates a Cartesian product of table T1 and table T2 for all columns that have the same name. DFor each row from T2, it updates the row if it exists within table T1, otherwise it inserts the row into T1.

单选题软组织脂肪瘤MRI信号特点为().A长T1、长T2信号B短T1、中长T2信号C长T1、短T2信号D长T1、中长T2信号E短T1、短T2信号