java ejb开发 程序4、语句alter table people add(phone_number varchar2(10)) 的作用是 A 修改表结构 B 为people表添加约束,约束名称是phone_number C 向people表中添加一列,名称是phone_number,数据类型是varchar2,长度是10 D 上述答案均不正确 5、( )BLOB和CLOB的区别在于 A CLOB只能存放字符类型的数据,而BLOB没有任何限制 B BLOB只能存放字符类型的数据,而CLOB没有任何限制 C CLOB只能存放小于4000字节的数据,而BLOB可以存放大于4000字节的数据 D BLOB只能存放小于4000字节的数据,而CLOB可以存放大于4000字节的数据 6、存储过程从本质上来讲就是 A 匿名的PL/SQL程序块,它可以被赋予参数 B 命名的PL/SQL程序块,它可以被赋予参数 C 命名的PL/SQL程序块,不能被赋予参数 D 匿名的PL/SQL程序块,不能被赋予参数 7、( )下列关于日期数据类型,哪一个语句是正确的写法 A insert into test values( 9999-12-03 ) B insert into test values( 1999-03-02 ) C insert into test values(to_char(1999-06-03, yyyy/dd/mm )) D insert into test
标签: people phone_number varchar2 alter
上传时间: 2013-12-26
上传用户:wendy15
计算矩阵连乘积 问题描述 在科学计算中经常要计算矩阵的乘积。矩阵A和B可乘的条件是矩阵A的列数等于矩阵B的行数。若A是一个p×q的矩阵,B是一个q×r的矩阵,则其乘积C=AB是一个p×r的矩阵。
上传时间: 2015-03-25
上传用户:yulg
The application you are going to create mimics entering an employee into a database .The user wil be required to enter an employee s name and age
标签: application The entering employee
上传时间: 2014-12-07
上传用户:ouyangtongze
Stantor is a Domotic project. It is a SCADA for the computer interface board K8055 (USB bus), K8000 (I2C bus) , X10 modules and also Webcam. It uses Browser WEB, I-mode and Wap2/Wap1, Apache,mySQL, PHP, javascript. It run with Linux 2.4 or 2.6 and XP
标签: interface computer Stantor Domotic
上传时间: 2013-12-18
上传用户:sevenbestfei
This software aims to create an applet and panel tools to manage a wireless interface card, such as IEEE 802.11 cards. The development will focus on Linux, as this is the most accessible platform, but will expand as we get access to more platforms
标签: interface software wireless create
上传时间: 2013-12-10
上传用户:semi1981
SRART: MOVX @R0,A 令ADC0809开始转换 WAIT: JB OP2.0,ADC 检测ADC0809转换完成否? CALL DISP 调用显示子程序 JMP WAIT ADC:MOVX A,@R0 将转换好的数据送入累加器 CALL L1 调用十进制转换子程序 MOV RI,#OFFH 显示延时
上传时间: 2015-03-26
上传用户:athjac
From your fax application view point it s a fax modem pool. From IP network view point it s a H.323 endpoint with T.38 fax support. From your view point it s a gateway between a fax application and IP network.
标签: point From view application
上传时间: 2015-03-26
上传用户:lnnn30
A/D Converter Demonstration for the PIC18CXXX
标签: Demonstration Converter CXXX for
上传时间: 2013-12-11
上传用户:ecooo
附录A S语言说明 A.1 字符集的定义 3数据类型定义
上传时间: 2014-01-02
上传用户:com1com2
The JDOM build system is based on Jakarta Ant, which is a Java building tool originally developed for the Jakarta Tomcat project but now used in many other Apache projects and extended by many developers.
标签: originally developed building Jakarta
上传时间: 2014-01-19
上传用户:xg262122