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单选题
对于雇员表（EMP）中的员工薪水（SAL）进行分级，3000元以上的为A级，2000元以上到3000元为B级，2000元及以下为C级，以下哪此操作能实现以上要求（）
A
select sal,decode(sal>3000,'A',sal>2000,'B','C') grade from emp;
B
select sal,decode(sal,3000,'A',2000,'B','C') grade from emp;
C
select sal,(case when sal>3000 then 'A' when sal>2000 then 'B' else 'C' end) grade from emp;
D
select sal,(if sal>3000 then 'A' elsif sal>2000 then 'B' else 'C' end if) grade from emp;
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更多 “单选题对于雇员表（EMP）中的员工薪水（SAL）进行分级，3000元以上的为A级，2000元以上到3000元为B级，2000元及以下为C级，以下哪此操作能实现以上要求（）A select sal,decode(sal3000,'A',sal2000,'B','C') grade from emp;B select sal,decode(sal,3000,'A',2000,'B','C') grade from emp;C select sal,(case when sal3000 then 'A' when sal2000 then 'B' else 'C' end) grade from emp;D select sal,(if sal3000 then 'A' elsif sal2000 then 'B' else 'C' end if) grade from emp;” 相关考题
考题
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;
考题
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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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;
考题
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.
考题
emp表是雇员信息表,sal字段存放是的雇员的月薪,以下哪个变量可以存放sal类型的值()
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考题
取出工资在2000到3000元(包括上下限)之间的员工()
A.select * from emp wher sal in (2000,3000);B.select * from emp wher sal like (2000,3000);C.select * from emp wher sal = (2000,3000);D.select * from emp wher sal between 2000 and 3000;
考题
授予sa用户在SCOTT.EMP表中SAL列的更新权限的语句是()。
A.GRANT CHANGE ON SCOTT.EMP TO SAB.GRANT UPDATE ON SCOTT.EMP（SAL） TO SAC.GRANT UPDATE （SAL） ON SCOTT.EMP TO SAD.GRANT MODIFY ON SCOTT.EMP（SAL） TO SA
考题
以下查询语句合法的是哪三项?()
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考题
执行如下两个查询，结果为（） Select ename name，sal salary from emp order by salary Select ename name，sal“salary”from emp order by sal ascA、两个查询结果完全相同B、第一个查询正确，第二个查询错误C、两个查询结构不同D、第二个查询正确，第一个查询错误
考题
数据库中有一张表名为Emp，包含有如下列：EmpNO（雇员编号，Varchar（20），Pk），Job（职位Varchar（10）），HirDate（雇佣日期，Date），Sal（月薪，Float），Comm（奖金，Float，可为空）。查询出雇员编号不为791，792，793的雇员信息应该是用哪些数据查询？（）A、Select * From Emp Where EmpNO Not In('791','792','793')B、Select * From Emp Where EmpNO !='791' AND EmpNO!='792' And EmpNO='793'C、Select * From Emp Where EmpNO '791' AND EmpNO792' And EmpNO=793'D、Select * From Emp Where EmpNO =!'791' AND EmpNO =!'792' And EmpNO =!'793'
考题
数据库中有一张表名为Emp，包含有如下列：EmpNO（雇员编号，Varchar（20），Pk），Job（职位Varchar（10）），HirDate（雇佣日期，Date），Sal（月薪，Float）。要求查询全部雇员信息应该是哪些数据？（）A、Select * From EmpB、Select * From Emp Where EmpNO Like '%%'C、Select * From Emp Where Name = '%%'D、Select * From Emp Where Name Like '%%'
考题
数据库中有一张表名为Emp，包含有如下列：EmpNO（雇员编号，Varchar（20），Pk），Job（职位Varchar（10）），HirDate（雇佣日期，Date），Sal（月薪，Float）。查询出职位不为“办事员”的雇员信息是（）A、Select *From Emp Where Job="办事员"B、Select* From Emp Where Job==’办事员’C、Select* From Emp Where Job’办事员’D、Select* From Emp Where Job!=’办事员’
考题
数据库中有一张表名为Emp，包含有如下列：EmpNO（雇员编号，Varchar（20），Pk），Job（职位Varchar（10）），HirDate（雇佣日期，Date），Sal（月薪，Float），Comm（奖金，Float，可为空）。查询出雇员编号为791，792，793的雇员信息是（）A、Select * From Emp Where EmpNO In('791','792','793')B、Select * From Emp Where EmpNO ='791' Or EmpNO='792' OR EmpNO='793'C、Select * From Emp Where EmpNO ='791' And EmpNO='793'D、Select * From Emp Where EmpNO '791' And EmpNO'793'
考题
对于雇员表（EMP）中的员工薪水（SAL）进行分级，3000元以上的为A级，2000元以上到3000元为B级，2000元及以下为C级，以下哪此操作能实现以上要求（）A、select sal,decode(sal3000,'A',sal2000,'B','C') grade from emp;B、select sal,decode(sal,3000,'A',2000,'B','C') grade from emp;C、select sal,(case when sal3000 then 'A' when sal2000 then 'B' else 'C' end) grade from emp;D、select sal,(if sal3000 then 'A' elsif sal2000 then 'B' else 'C' end if) grade from emp;
考题
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 above syntax 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;
考题
授予sa用户在SCOTT.EMP表中SAL列的更新权限的语句是（）。A、GRANT CHANGE ON SCOTT.EMP TO SAB、GRANT UPDATE ON SCOTT.EMP（SAL） TO SAC、GRANT UPDATE （SAL） ON SCOTT.EMP TO SAD、GRANT MODIFY ON SCOTT.EMP（SAL） TO SA
考题
取出工资在2000到3000元（包括上下限）之间的员工（）A、select * from emp wher sal in (2000,3000);B、select * from emp wher sal like (2000,3000);C、select * from emp wher sal = (2000,3000);D、select * from emp wher sal between 2000 and 3000;
考题
User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK， or any data definition language （DDL） command： SQL SELECT ename FROM emp 2 WHERE job=’CLERK’ FOR UPDATE OF empno； SCOTT has opened another session to work with the database instance. Which three operations wouldwait when issued in SCOTT’s second session（）A、LOCK TABLE emp IN SHARE MODE；B、LOCK TABLE emp IN EXCLUSIVE MODE；C、UPDATE emp SET sal=sal*1.2 WHERE job=MANAGER；D、INSERT INTO emp（empno，ename） VALUES （1289，’Harry’）；E、SELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno；
考题
User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK， orany data definition language （DDL） command： SQL SELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno； SCOTT has opened another session to work with the database instance. Which three operations would waitwhen issued in SCOTT’s second session（）A、LOCK TABLE emp IN SHARE MODE；B、LOCK TABLE emp IN EXCLUSIVE MODE；C、UPDATE emp SET sal=sal*1.2 WHERE job=ANAGER？UPDATE emp SET sal=sal*1.2 WHERE job=？ANAGER？D、INSERT INTO emp（empno，ename） VALUES （1289，’Harry’）；E、SELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno
考题
单选题取出工资在2000到3000元（包括上下限）之间的员工（）A
select * from emp wher sal in (2000,3000);B
select * from emp wher sal like (2000,3000);C
select * from emp wher sal = (2000,3000);D
select * from emp wher sal between 2000 and 3000;
考题
单选题执行如下两个查询，结果为（） Select ename name，sal salary from emp order by salary Select ename name，sal“salary”from emp order by sal ascA
两个查询结果完全相同B
第一个查询正确，第二个查询错误C
两个查询结构不同D
第二个查询正确，第一个查询错误
考题
单选题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 above syntax 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;
考题
单选题授予sa用户在SCOTT.EMP表中SAL列的更新权限的语句是（）。A
GRANT CHANGE ON SCOTT.EMP TO SAB
GRANT UPDATE ON SCOTT.EMP（SAL） TO SAC
GRANT UPDATE （SAL） ON SCOTT.EMP TO SAD
GRANT MODIFY ON SCOTT.EMP（SAL） TO SA
考题
单选题emp表是雇员信息表，sal字段存放是的雇员的月薪，以下哪个变量可以存放sal类型的值（）A
v_sal emp%rowtype;B
v_sal emp.sal%type;C
v_sal emp.sal.%type;D
v_sal %type(emp.sal);E
v_sal (emp.sal)%type;
考题
多选题User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK， or any data definition language （DDL） command： SQL SELECT ename FROM emp 2 WHERE job=’CLERK’ FOR UPDATE OF empno； SCOTT has opened another session to work with the database instance. Which three operations wouldwait when issued in SCOTT’s second session（）ALOCK TABLE emp IN SHARE MODE；BLOCK TABLE emp IN EXCLUSIVE MODE；CUPDATE emp SET sal=sal*1.2 WHERE job=MANAGER；DINSERT INTO emp（empno，ename） VALUES （1289，’Harry’）；ESELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno；
考题
多选题User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK， orany data definition language （DDL） command： SQL SELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno； SCOTT has opened another session to work with the database instance. Which three operations would waitwhen issued in SCOTT’s second session（）ALOCK TABLE emp IN SHARE MODE；BLOCK TABLE emp IN EXCLUSIVE MODE；CUPDATE emp SET sal=sal*1.2 WHERE job=ANAGER？UPDATE emp SET sal=sal*1.2 WHERE job=？ANAGER？DINSERT INTO emp（empno，ename） VALUES （1289，’Harry’）；ESELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno
考题
( 难度：中等)以下哪些Mysql语句是正确的？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＜300;E.select * from where deptno=1 group by sal;
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