XML无处不在——DB2 9给予你掌握它的力量

　 　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。

　　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。

　　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。