可以有无参数E序和带参数存储q程?/font>
无参E序语法
1 create or replace procedure NoParPro
2 as
;
3 begin
4;
5 exception
6;
7 end;
8
2 as
;3 begin
4
;5 exception
6
;7 end;
8
带参存储q程实例
1 create or replace procedure queryempname(sfindno emp.empno%type) as
2 sName emp.ename%type;
3 sjob emp.job%type;
4 begin
5 ....
7 exception
....
14 end;
15
2 sName emp.ename%type;
3 sjob emp.job%type;
4 begin
5 ....
7 exception
....
14 end;
15
带参数存储过E含赋值方?/font>
1 create or replace procedure runbyparmeters (isal in emp.sal%type,
sname out varchar,sjob in out varchar)
2 as icount number;
3 begin
4 select count(*) into icount from emp where sal>isal and job=sjob;
5 if icount=1 then
6 ....
9 else
10 ....
12 end if;
13 exception
14 when too_many_rows then
15 DBMS_OUTPUT.PUT_LINE('q回值多??/span>');
16 when others then
17 DBMS_OUTPUT.PUT_LINE('在RUNBYPARMETERSq程中出错！');
18 end;
19
sname out varchar,sjob in out varchar)
2 as icount number;
3 begin
4 select count(*) into icount from emp where sal>isal and job=sjob;
5 if icount=1 then
6 ....
9 else
10 ....
12 end if;
13 exception
14 when too_many_rows then
15 DBMS_OUTPUT.PUT_LINE('q回值多??/span>');
16 when others then
17 DBMS_OUTPUT.PUT_LINE('在RUNBYPARMETERSq程中出错！');
18 end;
19
q程调用
方式一
1 declare
2 realsal emp.sal%type;
3 realname varchar(40);
4 realjob varchar(40);
5 begin
6 realsal:=1100;
7 realname:='';
8 realjob:='CLERK';
9 runbyparmeters(realsal,realname,realjob); Q－必须按顺?br />10 DBMS_OUTPUT.PUT_LINE(REALNAME||' '||REALJOB);
11 END;
12
2 realsal emp.sal%type;
3 realname varchar(40);
4 realjob varchar(40);
5 begin
6 realsal:=1100;
7 realname:='';
8 realjob:='CLERK';
9 runbyparmeters(realsal,realname,realjob); Q－必须按顺?br />10 DBMS_OUTPUT.PUT_LINE(REALNAME||' '||REALJOB);
11 END;
12
方式?/font>
1 declare
2 realsal emp.sal%type;
3 realname varchar(40);
4 realjob varchar(40);
5 begin
6 realsal:=1100;
7 realname:='';
8 realjob:='CLERK';
9 runbyparmeters(sname=>realname,isal=>realsal,sjob=>realjob); Q－指定值对应变量顺序可?br />10 DBMS_OUTPUT.PUT_LINE(REALNAME||' '||REALJOB);
11 END;
12
2 realsal emp.sal%type;
3 realname varchar(40);
4 realjob varchar(40);
5 begin
6 realsal:=1100;
7 realname:='';
8 realjob:='CLERK';
9 runbyparmeters(sname=>realname,isal=>realsal,sjob=>realjob); Q－指定值对应变量顺序可?br />10 DBMS_OUTPUT.PUT_LINE(REALNAME||' '||REALJOB);
11 END;
12
improviser 2007-10-03 00:07 发表评论
]]>
1 创徏对象cd
2 create or replace type ADDRESS as object
3 (
4 PROVINCE varchar(10),
5 CITY varchar(20),
6 );
7
8 创徏ADDRESS可变数组
9 create or replace type ADDRESS_LIST as varray(3) of ADDRESS;
10
11 创徏表ƈ使用可变数组ADDRESS_LIST
12 create table STUDENT
13 (
14 STUNAME varchar(20),
15 STUADDS ADDRESS_LIST
16 );
17
18 向表中插入数?br />19 insert into STUDENT values('improviser',ADDRESS_LIST(ADDRESS('q东?/span>','q州?/span>','江v大道'),
ADDRESS('q东?/span>','潮州?/span>','潮枫?/span>')));
20
21 查询(使用table函数数据表格Ş式输?
22 select *from table(select s.STUADDS from STUDENT where STUNAME='improviser');
2 create or replace type ADDRESS as object
3 (
4 PROVINCE varchar(10),
5 CITY varchar(20),
6 );
7
8 创徏ADDRESS可变数组
9 create or replace type ADDRESS_LIST as varray(3) of ADDRESS;
10
11 创徏表ƈ使用可变数组ADDRESS_LIST
12 create table STUDENT
13 (
14 STUNAME varchar(20),
15 STUADDS ADDRESS_LIST
16 );
17
18 向表中插入数?br />19 insert into STUDENT values('improviser',ADDRESS_LIST(ADDRESS('q东?/span>','q州?/span>','江v大道'),
ADDRESS('q东?/span>','潮州?/span>','潮枫?/span>')));
20
21 查询(使用table函数数据表格Ş式输?
22 select *from table(select s.STUADDS from STUDENT where STUNAME='improviser');
4、嵌套表
嵌套表是表中之表Q一个嵌套表是某些行的集合，它在主表中表CZؓ其中的一列。对主表中的每一条记录，嵌套表可以包含多个行?/font>
1 定义嵌套表方法：
2 create or replace type ADDRESS_TABLE as table of ADDRESS;
3
4 基本对象cd、创、查询和插入数据都跟上面可变数组一?br /> 5
6 嵌套表更?/span>Q?/span>table转化再利用表别名操作列进行更?/span>Q?/span>
7 update table(select S.STUADDS from STUDENT S where
8 S.STUNAME = 'improviser') AD set AD.PROVINCE = '北京' where city = 'q州';
9
10删除嵌套表记?br />11delete from table(select S.STUADDS from STUDENT S
12 where S.STUNAME = 'improviser') AD where AD.city = '潮州?;
13
2 create or replace type ADDRESS_TABLE as table of ADDRESS;
3
4 基本对象cd、创、查询和插入数据都跟上面可变数组一?br /> 5
6 嵌套表更?/span>Q?/span>table转化再利用表别名操作列进行更?/span>Q?/span>
7 update table(select S.STUADDS from STUDENT S where
8 S.STUNAME = 'improviser') AD set AD.PROVINCE = '北京' where city = 'q州';
9
10删除嵌套表记?br />11delete from table(select S.STUADDS from STUDENT S
12 where S.STUNAME = 'improviser') AD where AD.city = '潮州?;
13
比较Q可变数l，查询速度快，但是更新困难得整体更斎ͼ适用与数据不修改情况Q如ȝ处方。用嵌套表可以对表中的表内容进行修改而无需q行整体更新操作?/font>
4、对象表
1 首先创徏对象cd
2 create or replace type OFFICETYPE as object
3 (
4 id varchar(10),
5 typename varchar(20)
6 );
7
8 对象类型{化ؓ对象?br /> 9 create table office of officetype;
10
11 创徏对象关系表（使用ref Q指COIDq行对象表关联）
12 create table worker
13 (
14 workerid varchar(10) primary key,
15 workername varchar(20),
16 workeroffice ref officetpey scope is office,
17 phone varchar(20)
18 );
19
20 使用deref 取得兌对象表相兛_?br />21 select workerid,workername,deref(w.workeroffice),phone from worker w
where workerid = 'C001';
22 l果?br />23 C001 张小明 OFFICETYPE('0001', '财务U?/span>') 010-12345
24
25 使用VALUE(别名)查询对象内容
26 select value(o) from office o;
27
2 create or replace type OFFICETYPE as object
3 (
4 id varchar(10),
5 typename varchar(20)
6 );
7
8 对象类型{化ؓ对象?br /> 9 create table office of officetype;
10
11 创徏对象关系表（使用ref Q指COIDq行对象表关联）
12 create table worker
13 (
14 workerid varchar(10) primary key,
15 workername varchar(20),
16 workeroffice ref officetpey scope is office,
17 phone varchar(20)
18 );
19
20 使用deref 取得兌对象表相兛_?br />21 select workerid,workername,deref(w.workeroffice),phone from worker w
where workerid = 'C001';
22 l果?br />23 C001 张小明 OFFICETYPE('0001', '财务U?/span>') 010-12345
24
25 使用VALUE(别名)查询对象内容
26 select value(o) from office o;
27
5、对象视?/font>
1 创徏对象视图Q通过OIDq接deptQ?br />2 create view deptview of deptype with object oid(deptno) as select *from deptQ?br />3 create view emp_view as select make_ref(deptview,deptno) deptoid,empno,ename
4 from emp;
4 from emp;
好了Q有关Oracle中面向对象的内容q要叙q这么多了，虽然现在很少使用刎ͼ但在以后有用C处有一定的参考作用?/font>
(转蝲h明出?/font>)
improviser 2007-10-02 11:44 发表评论
]]>?..
...l箋努力Q！Q?/font>
不多说题外话了，q入今天主题Q如题，今天对Oracle中表分区机制作个ȝ?br />
Oracle中提供了对表q行分区的机Ӟ通过表分区，可以表I间中数据按照某U方式分别存攑ֈ特定的分Z?/font>表分区的作用Q?/font>qIO操作Q分区均匀Q提高效率?br />
Oracle中表分区Ҏ有：范围分区法、散列分区法、复合分区法、列表分区法?br />
范围分区:语法 Partition by range(); 适合数值型或日期型
CZQ?/font>
1 create table Student
2(
3 Studentid integer not null,
4 Studentname varchar2(20),
5 Score integer
6)
7 Partition by range(Score)
8(
9 Partition p1 values less than(60),
10 Partition p2 values less than(75),
11 Partition p3 values less than(85),
12 Partition p4 values less than(maxvalue)
13 );
2(
3 Studentid integer not null,
4 Studentname varchar2(20),
5 Score integer
6)
7 Partition by range(Score)
8(
9 Partition p1 values less than(60),
10 Partition p2 values less than(75),
11 Partition p3 values less than(85),
12 Partition p4 values less than(maxvalue)
13 );
散列分区法：ҎOracle内部散列法存储Q语?Partition by hash();
实例Q?/font>
1 create table department
2 (
3 Deptno int,
4 Deptname varchar2(24)
5 )
6 Partition by hash(deptno)
7 (
8 Partition p1,
9 Partition p2
10 );
2 (
3 Deptno int,
4 Deptname varchar2(24)
5 )
6 Partition by hash(deptno)
7 (
8 Partition p1,
9 Partition p2
10 );
复合分区法：׃面两U方法复合而成
CZQ?/font>
1 create table salgrade
2 (
3 grade number,
4 losal number,
5 hisal number
6 )
7 Partition by range(grade)
8 Subpartition by hash(losal,hisal)
9 (
10 Partition p1 values less than(10),
11 (subpartition sp1,subpartition sp2),
12 Partition p2 values less than(20),
13 (subpartition sp3,subpartition sp4)
14 )
2 (
3 grade number,
4 losal number,
5 hisal number
6 )
7 Partition by range(grade)
8 Subpartition by hash(losal,hisal)
9 (
10 Partition p1 values less than(10),
11 (subpartition sp1,subpartition sp2),
12 Partition p2 values less than(20),
13 (subpartition sp3,subpartition sp4)
14 )
列表分区法：适合字符?语法Partition by list()
实例Q?/font>
1 create table customer
2 (
3 custNo int,
4 custname varchar(20),
5 custState varchar(20)
6 )
7 Partition by list(custState)
8 (
9 Partition saia values('中国','韩国','日本'),
10 Partition Europe values('英国','俄国','法国'),
11 Partition ameria values('国','加拿?/span>','墨西?/span>'),
12 );
13
2 (
3 custNo int,
4 custname varchar(20),
5 custState varchar(20)
6 )
7 Partition by list(custState)
8 (
9 Partition saia values('中国','韩国','日本'),
10 Partition Europe values('英国','俄国','法国'),
11 Partition ameria values('国','加拿?/span>','墨西?/span>'),
12 );
13
表分区维护：
d分区:alter table student add partition p5 values less than(120);
删除分区:alter table student drop partition p4;
截断分区:alter table student truncate partition p5;
合ƈ分区:alter table student merge partitions p3,p4 into partition p6;
(转蝲h明出?
improviser 2007-10-01 18:00 发表评论
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