语句SELECT‘ACCP’ FROM DUAL 的执行结果是()。
语句select LAST_DAY(‘2011-05-01’)from dual;的结果是()。A.2011-05-28B.2011-05-31C.2011-04-30D.2011-05-07
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语句select ROUND(45.953,-1),TRUNC(45.936,2)from dual;的结果是()。A.46 and 45B.46 and 45.93C.50 and 45.93D.50 and 45.9
执行下列L语句:SELECT MIN(价格) FROM 图书 INTO ARRAY temp则?temp[2]的结果是( )。A.17.80B.0C..F.D.下标超界
执行如下sQL语句: SELECT DISTINCT价格FROM图书 WHERE价格一(SELECT MAX(价格)FROM图书) INTO ARRAY arr 则?arr[2]的结果是( )。A.23.00B.32.00C.F.D.系统报错
有SQL语句: SELECT DISTINCT 系号 FROM 教师 WHERE 工资>=; ALL(SELECT 工资 FROM 教师 WHERE 系号="02") 该语句的执行结果是系号A) "01"和"02" B)"01"和"03" C)"01"和"04" D)"02"和"03"
显示本月月末的日期()A.select last_date(sysdate) from dual;B.select finally_day(sysdate) from dual;C.select last_day(sysdate) from dual;D.select tail_day(sysdate) from dual;
Select ‘accp’ from dual后运行结果是()。A.nullB.0C.accpD.编译出错