如何实现文章表news，id字段值为5记录的点击数字段num自增（）。A、Update news set num=num+1；B、Update news set num=num+1 where id==5C、Update news set num=num++ where id=5D、Update news set num=num+1 where id=5

题目

如何实现文章表news，id字段值为5记录的点击数字段num自增（）。

  • A、Update news set num=num+1；
  • B、Update news set num=num+1 where id==5
  • C、Update news set num=num++ where id=5
  • D、Update news set num=num+1 where id=5
相似考题

1.将订单号为"0060"的订单金额改为169元，正确的SQL语句是A）UPDATE订单SET金额=169 WHERE订单号="0060"B）UPDATE订单SET金额WITH 169 WHERE订单号="0060"C）UPDATE FROM订单SET金额＝169 WHERE订单号="0060"D）UPDATE FROM订单SET金额WITH 169 WHERE订单号="0060"

2.以下程序段的输出结果是。 num=0 while num<=2 num = num+1 wend Print

3.给所有的选修课号为"0001"的女生的该课程成绩增加5分，使用的语句为_____A UPDATE SKB SET 成绩 WITH 成绩+5 WHERE 课号 = “0001”AND 性别= “女”B UPDATE SKB SET 成绩 = 成绩+5 WHERE 课号 = “0001”AND 性别 =“女”C UPDATE SKB SET 成绩 = 成绩+5 WHERE 课号 = “0001”AND 学号 IN (SELECT * FROM STUDENT WHERE 性别 = “女”)D UPDATE SKB SET 成绩 WITH 成绩+5 WHERE 课号 = “0001”AND 学号 IN (SELECT * FROM STUDENT WHERE 性别 = “女”)

4.对于学生信息表：student(sno，sname，sex，age，dept)，如果把学生“小明”的姓名改为“小强”，则正确的语句是（ ）。A)UPDATE SET sname=‘小明’WHERE sname=‘小强’B)UPDATE student SET sname=‘小明’WHERE sname=‘小强’C)UPDATE student SET sname=‘小强’D)UPDATE student SET sname=‘小强’WHERE sname=‘小明’

更多“如何实现文章表news，id字段值为5记录的点击数字段num自增（）。A、Update news set num=num+1；B、Update news set num=num+1 where id==5C、Update news set num=num++ where id=5D、Update news set num=num+1 where id=5”相关问题

  • 第1题：

    Examine the structure of the EMPLOYEES table:EMPLOYEE_ID NUMBER NOT NULLEMP_NAME VARCHAR2(30)JOB_ID VARCHAR2(20) DEFAULT ‘SA_REP‘SAL NUMBERCOMM_PCT NUMBERMGR_ID NUMBERDEPARTMENT_ID NUMBERYou need to update the records of employees 103 and 115. The UPDATE statement you specify should update the rows with the values specified below:JOB_ID: Default value specified for this column definition.SAL: Maximum salary earned for the job ID SA_REP.COMM_PCT: Default value specified for this commission percentage column, if any. If no default value is specified for the column, the value should be NULL. DEPARTMENT_ID: Supplied by the user during run time through substitution variable.Which UPDATE statement meets the requirements?（）

    A. UPDATE employees SET job_id = DEFAULT AND Sal = (SELECT MAX(sal) FROM employees WHERE job_id = ‘SA_REP‘) AND comm_pct = DEFAULT AND department_id = &did WHERE employee _id IN (103,115);

    B. UPDATE employees SET job_id = DEFAULT AND Sal = MAX(sal) AND comm_pct = DEFAULT OR NULL AND department_id = &did WHERE employee_id IN (103,115) AND job _ id = ‘SA_ REP‘;

    C. UPDATE employees SET job_id = DEFAULT, Sal = (SELECT MAX(sal) FROM employees WHERE job_id = ‘SA_REP‘), comm_pct = DEFAULT, department_id = &did WHERE employee_id IN (103,115);

    D. UPDATE employees SET job_id = DEFAULT, Sal = MAX(sal), comm_pct = DEFAULT, department_id = &did WHERE employee_id IN (103,115) AND job _ id = ‘SA_ REP‘;

    E. UPDATE employees SET job_id = DEFAULT, Sal = (SELECT MAX(sal) FROM employees WHERE job_id = ‘SA_REP‘) comm_pct = DEFAULT OR NULL, department_id = &did WHERE employee_id IN (103,115);


    参考答案：C

  • 第2题：

    在Visual FoxPro中，使用SQL命令将学生表STUDENT中的学生年龄AGE字段的值增加1岁，应该使用的命令是

    A．REPLACE AGE WITH AGE+1

    B．UPDATE STUDENT AGE WITH AGE+1

    C．UPDATE SET AGE WITH AGE+I

    D．UPDATE STUDENT SET AGE=AGE+1


    正确答案：D
    解析：本题考查SQL语句中UPDATA语句的功能和使用。选项A的错误在于，它是普通的修改命令，在缺少短语ALL情况下，只能修改当前的记录；选项B的错误在于不应该使用 WITH短语；选项C则没有指明对STUDENT表进行操作，并且不应该使用短语WITH；选项D是实现题目要求的正确书写方法，故选项D为正确答案。

  • 第3题：

    使用如下数据表：仓库表(仓库号，所在城市) 职工表(职工号，仓库号，工资) 其中，仓库号、所在城市和职工号字段为字符型，工资字段为数值型。 将仓库号为A4的职工的工资改为2000．O0，正确的命令是（ ）。

    A. UPDATE职工表SET工资WITH 2000．00 WHERE仓库号=”A4”

    B. UPDATE职工表SET工资=2000．OO WHERE仓库号=”A4”

    C. UPDATE FROM职工表SET工资wITH 2000．OO WHERE仓库号=”A4”

    D. UPDATE FROM职工表SET工资=2000．OO WHERE仓库号=”A4”


    正确答案：B
    UPDATE命令的格式为：UPDATE数据表名SET列名1=表达式1[，列名2=表达式2…]WHERE筛选条件。

  • 第4题：

    （ 35 ）将学号为 “ 02080110 ” 、课程号为 “ 102 ” 的选课记录的成绩改为 92 ，正确的 SQL 语句是

    A ） UPDATE 选课 SET 成绩 WITH 92 WHERE 学号 = "02080110" AND 课程号 = "102"

    B ） UPDATE 选课 SET 成绩 =92 WHERE 学号 = "02080110" AND 课程号 = "102"

    C ） UPDATE FROM 选课 SET 成绩 WITH 92 WHERE 学号 = "02080110" AND 课程号 = "102"

    D ） UPDATE FROM 选课 SET 成绩 =92 WHERE 学号 = "02080110" AND 课程号 = "102"


    正确答案：B

  • 第5题：

    将表Teacher中职称字段为"助教"人员改为"讲师"，应为（）

    • A、UPDATE Teacher SET职称="助教"WHERE职称="讲师"
    • B、UPDATE Teacher SET职称="讲师"WHERE职称="助教"
    • C、UPDATE SET职称="助教"WHERE职称="讲师"FROMTeacher
    • D、UPDATE SET职称="讲师"WHERE职称="助教"FROMTeacher

    正确答案:B

  • 第6题：

    下列MySQL命令中，可以实现更新记录的命令有（）。

    • A、update 数据表参照关系 set 字段名称=值， [where 条件] [group by 字段名称]
    • B、update 数据表，数据表， set 字段名称=值，where 条件
    • C、update 数据表 set 字段名称=值，[where 条件]
    • D、update 数据表 set 字段名称=值， [where 条件] [order by 字段名称]

    正确答案:C

  • 第7题：

    要在tbAddress表中更新记录，下面（）语句是正确的。

    • A、Update tbAddress Set strName="萌萌"，intAge=22 Where ID=2
    • B、Update tbAddress Set strName=萌萌，intAge=22 Where strName=萌萌
    • C、Update tbAddress Set dtmSubmit=2008-10-1 Where strName="萌萌"
    • D、Update tbAddress Set intAge=18

    正确答案:A,D

  • 第8题：

    使用（）语句，将Account表内的性别字段内容，全部都改为“男”。

    • A、Update account SET Sex=´女´where Sex=´男´
    • B、Update account SET Sex=´男´where Sex=´女´
    • C、Update FROM account SET Sex=´女´where Sex=´男´
    • D、Update FROM account SET Sex=´男´where Sex=´女´

    正确答案:B

  • 第9题：

    Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER NOT NULL EMP_NAME VARCHAR2(30) JOB_ID VARCHAR2(20) DEFAULT 'SA_REP' SAL NUMBER COMM_PCT NUMBER MGR_ID NUMBER DEPARTMENT_ID NUMBER You need to update the records of employees 103 and 115. The UPDATE statement you specify should update the rows with the values specified below: JOB_ID: Default value specified for this column definition. SAL: Maximum salary earned for the job ID SA_REP. COMM_PCT: Default value specified for this commission percentage column, if any. If no default value is specified for the column, the value should be NULL. DEPARTMENT_ID: Supplied by the user during run time through substitution variable. Which UPDATE statement meets the requirements?（）

    • A、UPDATE employees SET job_id = DEFAULT AND Sal = (SELECT MAX(sal) FROM employees WHERE job_id = 'SA_REP') AND comm_pct = DEFAULT AND department_id = &did WHERE employee_id IN (103,115);
    • B、UPDATE employees SET job_id = DEFAULT AND Sal = MAX(sal) AND comm_pct = DEFAULT OR NULL AND department_id = &did WHERE employee_id IN (103,115) AND job_id = 'SA_REP';
    • C、UPDATE employeesC.UPDATE employees SET job_id = DEFAULT, Sal = (SELECT MAX(sal) FROM employees WHERE job_id = 'SA_REP'), comm_pct = DEFAULT, department_id = &did WHERE employee_id IN (103,115);
    • D、UPDATE employeesD.UPDATE employees SET job_id = DEFAULT, Sal = MAX(sal), comm_pct = DEFAULT, department_id = &did WHERE employee_id IN (103,115) AND job_id = 'SA_REP';
    • E、UPDATE employees SET job_id = DEFAULT, Sal = (SELECT MAX(sal) FROM employees WHERE job_id = 'SA_REP'), comm_pct = DEFAULT OR NULL, department_id = &did WHERE employee_id IN (103,115);

    正确答案:C

  • 第10题：

    Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER NOT NULL EMP_NAME VARCHAR2(30) JOB_ID VARCHAR2(20) DEFAULT 'SA_REP' SAL NUMBER COMM_PCT NUMBER MGR_ID NUMBER DEPARTMENT_ID NUMBER You need to update the records of employees 103 and 115. The UPDATE statement you specify should update the rows with the values specified below: JOB_ID: Default value specified for this column definition. SAL: Maximum salary earned for the job ID SA_REP. COMM_PCT: Default value specified for this commission percentage column, if any. If no default value is specified for the column, the value should be NULL. DEPARTMENT_ID: Supplied by the user during run time through substitution variable. Which UPDATE statement meets the requirements?（）

    • A、UPDATE employees SET job_id = DEFAULT AND Sal = (SELECT MAX(sal) FROM employees WHERE job_id = 'SA_REP') AND comm_pct = DEFAULT AND department_id = &did WHERE employee _id IN (103,115);
    • B、UPDATE employees SET job_id = DEFAULT AND Sal = MAX(sal) AND comm_pct = DEFAULT OR NULL AND department_id = &did WHERE employee_id IN (103,115) AND job _ id = 'SA_ REP';
    • C、UPDATE employees SET job_id = DEFAULT, Sal = (SELECT MAX(sal) FROM employees WHERE job_id = 'SA_REP'), comm_pct = DEFAULT, department_id = &did WHERE employee_id IN (103,115);
    • D、UPDATE employees SET job_id = DEFAULT, Sal = MAX(sal), comm_pct = DEFAULT, department_id = &did WHERE employee_id IN (103,115) AND job _ id = 'SA_ REP';
    • E、UPDATE employees SET job_id = DEFAULT, Sal = (SELECT MAX(sal) FROM employees WHERE job_id = 'SA_REP') comm_pct = DEFAULT OR NULL, department_id = &did WHERE employee_id IN (103,115);

    正确答案:C

  • 第11题：

    单选题
    Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2 (25) LAST_NAME VARCHAR2 (25) HIRE_DATE DATE Which UPDATE statement is valid?（）
    A

    UPDATE employees SET first_name = 'John' SET last_name = 'Smith' WHERE employee_id = 180;

    B

    UPDATE employees SET first_name = 'John', SET last_name = 'Smoth' WHERE employee_id = 180;

    C

    UPDATE employee SET first_name = 'John' AND last_name = 'Smith' WHERE employee_id = 180;

    D

    UPDATE employee SET first_name = 'John', last_name = 'Smith' WHERE employee_id = 180;


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER NOT NULL EMP_NAME VARCHAR2(30) JOB_ID VARCHAR2(20) DEFAULT 'SA_REP' SAL NUMBER COMM_PCT NUMBER MGR_ID NUMBER DEPARTMENT_ID NUMBER You need to update the records of employees 103 and 115. The UPDATE statement you specify should update the rows with the values specified below: JOB_ID: Default value specified for this column definition. SAL: Maximum salary earned for the job ID SA_REP. COMM_PCT: Default value specified for this commission percentage column, if any. If no default value is specified for the column, the value should be NULL. DEPARTMENT_ID: Supplied by the user during run time through substitution variable. Which UPDATE statement meets the requirements?（）
    A

    UPDATE employees SET job_id = DEFAULT AND Sal = (SELECT MAX(sal) FROM employees WHERE job_id = 'SA_REP') AND comm_pct = DEFAULT AND department_id = &did WHERE employee _id IN (103,115);

    B

    UPDATE employees SET job_id = DEFAULT AND Sal = MAX(sal) AND comm_pct = DEFAULT OR NULL AND department_id = &did WHERE employee_id IN (103,115) AND job _ id = 'SA_ REP';

    C

    UPDATE employees SET job_id = DEFAULT, Sal = (SELECT MAX(sal) FROM employees WHERE job_id = 'SA_REP'), comm_pct = DEFAULT, department_id = &did WHERE employee_id IN (103,115);

    D

    UPDATE employees SET job_id = DEFAULT, Sal = MAX(sal), comm_pct = DEFAULT, department_id = &did WHERE employee_id IN (103,115) AND job _ id = 'SA_ REP';

    E

    UPDATE employees SET job_id = DEFAULT, Sal = (SELECT MAX(sal) FROM employees WHERE job_id = 'SA_REP') comm_pct = DEFAULT OR NULL, department_id = &did WHERE employee_id IN (103,115);


    正确答案： C
    解析： 暂无解析

  • 第13题：

    在下列所给的操作中，哪个操作能被执行

    A．UPDATE部门SET部门号=′05′WHERE部门名=′财务部′

    B．UPDATE部门SET部门号=′05′WHERE部门名=′服务部′

    C．UPDATE雇员SET工资=600 WHERE雇员号=′010′

    D．UPDATE雇员SET部门号=′05′WHERE雇员号=′101′


    正确答案：B
    解析：级联删除和级联更新是两个表中的相关数据，可同时删除和更新，否则，牵涉两表的内容不能删除和更新。选项A：条件中部门名为“财务部”的部门号“01”涉及另一个表雇员，所以不能执行。选项B，“服务部”对应的部门号为“03”，在雇员中没有此字段的内容，所以可以更新。选项 C，雇员号为“01”，对应部门号为“01”，在部门表中也有此记录，所以不能更新，同理选项D也不能执行。

  • 第14题：

    若要使所有学科80分以上的成绩都增加5%, 80至60分的成绩都增加10%，应如何更新数据库（ ）。 A．UPDATE SC SET GRADE=GRADE*1．05 WHERE SC．GRADE>=80 UPDATE SC SET GRADE=GRADE* 1．10 WHERE SC．GRADE>=60 AND SC．GRADE <=80 B．UPDATE SC SET GRADE=GRADE* 1．10 WHERE SC．GRADE>=60 AND SC．GRADE<=80 UPDATE SC SET GRADE=GRADE* 1．05 WHERE SC．GRADE>=80 C．UPDATE SC SET GRADE=GRADE* 1．05 WIRE SC．GRADE>=80 AND SET GRADE =GRADE* 1．10 WHARE SC．GRADE>=60 D．UPDATE SC SET GRADE=GRADE* 1．10 WHERE SC．GRADE>=60 AND SC．GRADE <=80 AND SET GRADE=GRADE* 1．05 WHERE SC．GRADE>=80


    正确答案：A
    Update 语句用于修改表中的数据,语法：UPDATE 表名称 SET 列名称 = 新值 WHERE 列名称 = 某值，根据语法，表名称应该为SC，GRADE=GRADE*1．05，条件为SC．GRADE>=80，后面的60到80分的同理。

  • 第15题：

    请填写以下Cisco 6500交换机端口配置命令的描述。

    set port name mod_num／port_num[name_string] (1)

    set port level mod—num／port_num noramal I high (2)

    set port speed mod_num／port_num<1011001auto> (3)

    set port duplex mod_num／port_num fullIhalf (4)

    show port mod_num／port_num (5)


    正确答案：(1)设置端口名称 (2)设置端口优先级 (3)设置端口速率 (4)设置端口传输类型 (5)检查端口配置状态
    (1)设置端口名称 (2)设置端口优先级 (3)设置端口速率 (4)设置端口传输类型 (5)检查端口配置状态 解析：此题考查了Cisco 6500交换机端口配置命令的使用。

  • 第16题：

    （18）若要将“产品”表中所有供货商是“ABC”的产品单价下调50，则正确的SQL语句是

    A）UPDATE 产品 SET 单价=50 WHERE 供货商="ABC"

    B）UPDATE 产品 SET 单价＝单价-50 WHERE 供货商="ABC"

    C）UPDATE FROM 产品 SET单价=50 WHERE 供货商="ABC"

    D）UPDATE FROM 产品 SET单价=单价-50 WHERE 供货商="ABC"


    正确答案：B

  • 第17题：

    如何使用ORM实现以下查询SQL，SELECT*FROMorderWHEREidBETWE130.如何使用ORM实现以下查询SQL，SELECT*FROMorderWHEREidBETWE，EN20AND100AND（num<=20ornum>=30）；（）

    • A、Order.objects.filter（id__gt=20，id__lt=100）.filter（Q（num<=20）Q.num>=30））
    • B、Order.objects.filter（id__gt=20，id__lt=100）.filter（Q（num__lte=20）Q.num__gte=30））
    • C、Order.objects.filter（Q（id__gt=20）&Q（id__lt=100））.filter（Q（num__lte=20）Q.num__gte=30））
    • D、Order.objects.filter（Q（id__gt=20）&&Q（id__lt=100））.filter（Q（num__lte=20）Q.num__gte=30））

    正确答案:C

  • 第18题：

    学生成绩表grade中有字段score（float），现在要把所有在55至60分之间的分数提高5分，以下SQL语句正确的是（）。

    • A、Update grade set score=score+5 where score in 55..60
    • B、Update grade set score=score+5 where score >=55 AND score <=60
    • C、Update grade set score=score+5 where score between 55 or 60
    • D、Update grade set score=score+5 where score <=55 and score >=60

    正确答案:B

  • 第19题：

    学生成绩表grade中有字段score（float），现在要把所有在55分至60之间的分数提高5分，以下sql语句正确的是（）

    • A、Update grade set score=score+5
    • B、Update grade set score=score+5 where score>=55 or score <=60
    • C、Update grade set score=score+5 where score between 55 and 60
    • D、Update grade set score=score+5 where score >=55 and score <=60

    正确答案:C,D

  • 第20题：

    Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE You issue these statements: CREATE table new_emp ( employee_id NUMBER, name VARCHAR2(30)); INSERT INTO new_emp SELECT employee_id , last_name from employees; Savepoint s1; UPDATE new_emp set name = UPPER(name); Savepoint s2; Delete from new_emp; Rollback to s2; Delete from new_emp where employee_id =180; UPDATE new_emp set name = 'James'; Rollback to s2; UPDATE new_emp set name = 'James' WHERE employee_id =180; Rollback; At the end of this transaction, what is true?（）

    • A、You have no rows in the table.
    • B、You have an employee with the name of James.
    • C、You cannot roll back to the same savepoint more than once.
    • D、Your last update fails to update any rows because employee ID 180 was already deleted.

    正确答案:A

  • 第21题：

    Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE Which UPDATE statement is valid?（）

    • A、UPDATE employees SET first_name = 'John' SET last_name ='Smith' WHERE employee_id = 180;
    • B、UPDATE employees SET first_name = 'John', SET last_name ='Smith' WHERE employee_id = 180;
    • C、UPDATE employees SET first_name = 'John' AND last_name ='Smith' WHERE employee_id = 180;
    • D、UPDATE employees SET first_name = 'John', last_name ='Smith' WHERE employee_id = 180;

    正确答案:D

  • 第22题：

    单选题
    如何实现文章表news，id字段值为5记录的点击数字段num自增（）。
    A

    Update news set num=num+1；

    B

    Update news set num=num+1 where id==5

    C

    Update news set num=num++ where id=5

    D

    Update news set num=num+1 where id=5


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER NOT NULL EMP_NAME VARCHAR2(30) JOB_ID VARCHAR2(20) DEFAULT 'SA_REP' SAL NUMBER COMM_PCT NUMBER MGR_ID NUMBER DEPARTMENT_ID NUMBER You need to update the records of employees 103 and 115. The UPDATE statement you specify should update the rows with the values specified below: JOB_ID: Default value specified for this column definition. SAL: Maximum salary earned for the job ID SA_REP. COMM_PCT: Default value specified for this commission percentage column, if any. If no default value is specified for the column, the value should be NULL. DEPARTMENT_ID: Supplied by the user during run time through substitution variable. Which UPDATE statement meets the requirements?（）
    A

    UPDATE employees SET job_id = DEFAULT AND Sal = (SELECT MAX(sal) FROM employees WHERE job_id = 'SA_REP') AND comm_pct = DEFAULT AND department_id = &did WHERE employee_id IN (103,115);

    B

    UPDATE employees SET job_id = DEFAULT AND Sal = MAX(sal) AND comm_pct = DEFAULT OR NULL AND department_id = &did WHERE employee_id IN (103,115) AND job_id = 'SA_REP';

    C

    UPDATE employeesC.UPDATE employees SET job_id = DEFAULT, Sal = (SELECT MAX(sal) FROM employees WHERE job_id = 'SA_REP'), comm_pct = DEFAULT, department_id = &did WHERE employee_id IN (103,115);

    D

    UPDATE employeesD.UPDATE employees SET job_id = DEFAULT, Sal = MAX(sal), comm_pct = DEFAULT, department_id = &did WHERE employee_id IN (103,115) AND job_id = 'SA_REP';

    E

    UPDATE employees SET job_id = DEFAULT, Sal = (SELECT MAX(sal) FROM employees WHERE job_id = 'SA_REP'), comm_pct = DEFAULT OR NULL, department_id = &did WHERE employee_id IN (103,115);


    正确答案： D
    解析： 暂无解析

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