对于以下SQL语句说法正确的是（） SELECT ename FROM emp WHERE sal IN (SELECT

第1题

下列哪个语句查出雇员表(employees)里的雇员名字(ename)是‘SMITH’的信息,并且给雇员名字(ename)列定义一个别名Name()。A.select employeesno，ename Name，job from employees where ename=‘SMITH’B.select employeesno，ename ‘Name’，job from employees where ename=SMITHC.select employeesno，ename “Name”，job from employees where ename=‘SMITH’D.select employeesno，ename ‘Name’，job frome mployees wheree name=‘SMITH’

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第2题

SQL语句：SELECT*FROM班级WHERE班级号NOT IN;(SELECT班级号FROM学生)该语句等价于：SELECT*FROM班级WHERE NOT______;(SELECT*FROM学生WHERE班级号=班级.班级号)

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第3题

以下语句错误的是( )A.select sal+1 from emp;B.select sal*10,sal*deptno from emp;C.不能使用运算符号D.select sal*10,deptno*10 from emp;

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第4题

以下语句不正确的是( )A.select * from emp;B.select ename,hiredate,sal from emp;C.select * from emp order deptno;D.select * from where deptno=1 and sal

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第5题

以下说法错误的是( )A.SELECT max(sal),deptno,job FROM EMP group by sal;B.SELECT max(sal),deptno,job FROM EMP group by deptno;C.SELECT max(sal),deptno,job FROM EMP;D.SELECT max(sal),deptno,job FROM EMP group by job;

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第6题

Examine the following commands and their output:SQL> SELECT ename, sal FROM emp WHERE ename=‘JAMES‘; ENAME SAL JAMES 1050QL> UPDATE emp SET sal=sal+sal*1.2 WHERE ename=‘JAMES‘;1 row updated.SQL> SELECT ename, sal FROM emp WHERE ename=‘JAMES‘; ENAME SAL JAMES 2310View the exhibit and examine the Flashback Version Query that was executed after the preceding commands.What could be the possible cause for the query not displaying any row?（）A. Flashback logging is not enabled for the database.B. The changes made to the table are not committed.C. Supplemental logging is not enabled for the database.D. The database is not configured in ARCHIVELOG mode.

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第7题

Evaluate this SQL statement:SELECT ename, sal, 12* sal+100 FROM emp;The SAL column stores the monthly salary of the employee. Which change must be made to the abovesyntax to calculate the annual compensation as "monthly salary plus a monthly bonus of $100, multiplied by 12"? （）A. No change is required to achieve the desired results.B. SELECT ename, sal, 12* (sal+100) FROM emp;C. SELECT ename, sal, (12* sal)+100 FROM emp;D. SELECT ename, sal +100,*12 FROM emp;

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