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当前位置:设计首页 >> 程序开发 >> 数据库 >> XML无处不在——DB2 9给予你掌握它的力量

XML无处不在——DB2 9给予你掌握它的力量 (3)

2008-01-05 08:59:42  作者:  来源:互联网  浏览次数:32  文字大小:【】【】【
简介:  前言  XML不是新概念了。感谢诸如Ajax这样的新技术,使得它在过去的一些年里发展迅速。但是奇怪的是,到目前为止,数据库却拥有非常少的本地XML特性。  IBM最新的数据库,IBM DB2 9,引入了pureXML,一 ...
关键字:力量
   引入AJAXDEMO数据库

  你将创建两个表,一个有XML域,一个没有。你可以通过各种方式来操作,如通过控制中心。但是为了展示的目的,打开VS2005,创建一个新的ASP.NET站点“Superpals”,如图5和6.将“Visual C#”作为开发语言。

Superpals


db2



  为了测试你的新Web易用,在Default.aspx的<div>标记中间键入一些文字并运行。当一切正常,结束运行返回IDE。在工具菜单下寻找“IBM DB2 Tools”。图7.你可以通过这个菜单来访问你的DB2 产品,就像你打开开始菜单一样。选择工具-> IBM DB2 Tools->命令编辑器来打开查询窗口。

IBM DB2 Tools



  拷贝List1 中的代码到查询窗口。

CONNECT TO AJAXDEMO;

------------------------------------------------
-- DDL Statements for table "NULLID "."HEROES_NOXML"
------------------------------------------------


CREATE TABLE "NULLID "."HEROES_NOXML" (
"HEROID" INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY (
START WITH +1
INCREMENT BY +1
MINVALUE +1
MAXVALUE +2147483647
NO CYCLE
NO CACHE
NO ORDER ) ,
"HERONAME" VARCHAR(50) NOT NULL ,
"POWER" VARCHAR(255) ,
"WEAKNESS" VARCHAR(255) ,
"NOTES" CLOB(1048576) LOGGED NOT COMPACT )
IN "USERSPACE1" ;

 

-- DDL Statements for primary key on Table "NULLID "."HEROES_NOXML"

ALTER TABLE "NULLID "."HEROES_NOXML"
ADD CONSTRAINT "CC1158547603783" PRIMARY KEY
("HEROID");

------------------------------------------------
-- DDL Statements for table "NULLID "."HEROES_XML"
------------------------------------------------


CREATE TABLE "NULLID "."HEROES_XML" (
"HEROID" INTEGER NOT NULL GENERATED ALWAYS AS IDENTITY (
START WITH +1
INCREMENT BY +1
MINVALUE +1
MAXVALUE +2147483647
NO CYCLE
NO CACHE
NO ORDER ) ,
"HERONAME" VARCHAR(50) NOT NULL ,
"NOTES" XML )
IN "USERSPACE1" ;

 

-- DDL Statements for primary key on Table "NULLID "."HEROES_XML"

ALTER TABLE "NULLID "."HEROES_XML"
ADD CONSTRAINT "CC1158547736768" PRIMARY KEY
("HEROID");

COMMIT WORK;

CONNECT RESET;

TERMINATE;
This creates the following two tables:
HEROES_NOXML:
HEROID, INTEGER (4), IDENTITY, NOT NULLABLE
HERONAME, VARCHAR (50), NOT NULLABLE
POWER, VARCHAR (255), NULLABLE
WEAKNESS, VARCHAR (255), NULLABLE
NOTES, CLOB, NULLABLE
HEROES_XML:
HEROID, INTEGER (4), IDENTITY, NOT NULLABLE
HERONAME, VARCHAR (50), NOT NULLABLE
NOTES, XML, NULLABLE
Populate the first table by copying the SQL code from Listing 2 into your Command Editor.
Listing 2: HEROES_NOXML Data
INSERT INTO NULLID.HEROES_NOXML
(HERONAME, POWER, NOTES)
VALUES ('Mockingbird','Can mimic any sound she hears.','Alter ego:
Mariah Carey');

INSERT INTO NULLID.HEROES_NOXML
(HERONAME, POWER, WEAKNESS, NOTES)
VALUES ('Indigo','Telepathy','Gets cranky if he stays up too late.','Current age: 8.
Additional weakness: lactose intolerant.');

INSERT INTO NULLID.HEROES_NOXML
(HERONAME, POWER, WEAKNESS, NOTES)
VALUES ('Indivisibull','Super strength; can reattach severed body
parts.','Not too bright.','Secret origin: a somewhat clumsy man,
Hank "Bullhead" Durham fell into a vat of fresh glue
and was promptly struck by lightning. Since then, whenever he
loses a limb, he has simply to hold it in place and the limb becomes reattached.');

INSERT INTO NULLID.HEROES_NOXML
(HERONAME, POWER, WEAKNESS, NOTES)
VALUES ('Dayglo','Glows under a black light.','Not having a black light around.','Usually
relegated to sidekick, though once played a crucial role in a mission busting an
underground pot growers cabal.');

INSERT INTO NULLID.HEROES_NOXML
(HERONAME, POWER, WEAKNESS, NOTES)
VALUES ('Thumbalina','Ability to text message at light speed.','Thumbsucking
(a nervous habit in times of great stress).','Former codename: Twiddle.');

  下面我们学习如何在VS2005中使用DB2 9插件来创建一个web服务,和异步的JavaScript交互。

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