--创建用户
CREATE USER jim IDENTIFIED BY changeit;--给用户赋登陆连接权限
GRANT CONNECT TO jim;--给用户赋资源权限
GRANT RESOURCE TO jim;--回收登陆权限
REVOKE CONNECT FROM jim;--回收资源操作权限
REVOKE RESOURCE FROM jim;--锁定用户
ALTER USER jim ACCOUNT LOCK;--给用户解锁
ALTER USER jim ACCOUNT UNLOCK;--给用户修改密码
ALTER USER jim IDENTIFIED BY changeit;--创建时间维度表
CREATE TABLE DIM_DATE(Date_ID char(8) primary key , --20160704Date_Name date,  --2016/7/4Year number,    --2016Year_Half char(6), --2016H2Year_Month char(6),  --201607Year_Quarter char(6),-- 2016Q3Half_Number number,--2Half_Name char(2), --H2Quarter_Number number,--3Quarter_Name char(2),--Q3Month_Number number,--7Month_Name nvarchar2(20),--JUNLWeek_Number number, --2Week_Name nvarchar2(20),--MondayCreat_Date date,   --创建时间Update_Date date) --更新时间
    ;--测试选出一段时间select to_date('2014-01-01','YYYY-MM-DD')+(rownum-1) from dual connect by rownum<=(to_date('2015-01-01','YYYY-MM-DD')-to_date('2014-01-01','YYYY-MM-DD'));with temp_date as (select to_date('2014-01-01','YYYY-MM-DD')+(rownum-1) from dual connect by rownum<=(to_date('2015-01-01','YYYY-MM-DD')-to_date('2014-01-01','YYYY-MM-DD')))select * from temp_date;--创建存储过程，导入时间CREATE OR REPLACE PROCEDURE SP_ADD_DATEASv_Half number;v_Quarter number;v_Month DIM_Date.Month_Name%type;v_Month_Number number;CURSOR c_date ISSELECT Date_ID,DIM_Date.Date_Name FROM DIM_DATE;c_row c_date%rowtype;BEGINMERGE INTO DIM_DATE T1USING(select to_date('2014-01-01','YYYY-MM-DD')+(rownum-1) date_name from dual connect by rownum<=(to_date('2018-01-01','YYYY-MM-DD')-to_date('2014-01-01','YYYY-MM-DD')) ) temp_Dateon (t1.date_name=temp_Date.date_name)when matched thenupdate set t1.date_id=to_char(temp_Date.date_name,'YYYYMMDD')when not matched theninsert (Date_ID) values(to_char(temp_Date.date_name,'YYYYMMDD'));--循环游标FOR c_row in c_date loopv_Month_Number:=to_number(to_char(c_row.Date_Name,'MM'));if v_Month_Number>6 thenv_Half:=2;elsev_Half:=1;end if;update DIM_DATE setDIM_DATE.DATE_NAME=to_date(c_row.Date_ID,'YYYY-MM-DD'),DIM_DATE.HALF_NAME='H'||v_Half   --后面在这里补充where  DIM_DATE.DATE_ID=c_row.Date_ID;end loop;END;

 /*******************华丽的分割线********************/--创建地域维度表CREATE TABLE DIM_Geo(M_CNTY_ID number primary key,M_CNTY nvarchar2(20),  --县M_CITY nvarchar2(20), --市M_PRVNC nvarchar2(20)--省
   );--创建销售事实表CREATE TABLE SALES_FACT(EMPNO NUMBER(4),DATE_ID char(8),CITY_ID NUMBER,SALES NUMBER);--基于多列的联合主键--此处为empno，date_ID, city_ID共同为一个主键alter table SALES_FACT add constraint PK_SALES_FACT PRIMARY KEY (EMPNO,DATE_ID,CITY_ID);--查询出事实表WITH v1 as (select * from SALES_FACT),v2 as (select * from EMP),v3 as (select * from DIM_DATE),v9 as (select * from DIM_Geo),v6 as (select distinct sales_fact.city_id from sales_fact),v4 as(SELECT v2.ename,v1.date_id,v1.city_id,v1.sales FROM v1 right join v2 on  v2.empno=v1.empno),v5 as (select v4.ename,v3.date_id,v4.city_id,v4.sales from v4 partition by (v4.ename)right join v3 on v3.date_id=v4.date_id),v7 as (select v5.ename,v5.date_id,v6.city_id,v5.sales from v5 partition by (ename,date_id)right join v6 on v6.city_id=v5.city_id),v8 as (select v7.ename,v3.Date_ID,v3.Date_Name,v3.Quarter_Name,v3.Quarter_Number,v3.Month_Number,v3.MONTH_NAME,v3.Week_Name,v7.city_id,v7.sales from v7 left join v3on v7.date_id=v3.date_id  group by v7.ename,v3.Date_ID,v3.Date_Name,v3.Quarter_Name,v3.Quarter_Number,v3.MONTH_NAME,v3.Month_Number,v3.Week_Name,v7.city_id,v7.sales order by v7.ename,v3.Quarter_Name,v3.Week_Name)select ename,month_name,v9.M_CNTY,v9.M_CITY,v9.M_PRVNC,sum(sales) from v8left join v9 on v8.city_id=v9.M_CNTY_ID WHERE ENAME='ADAMS' GROUP BY ename,month_name,v9.M_CNTY,v9.M_CITY,v9.M_PRVNC ORDER BY MONTH_NAME,M_CNTY ;

select regexp_substr('ABCD EF G','[^ ]+',1,level,'c') from dual
connect by regexp_substr('ABCD EF G','[^ ]+',1,level,'c') is not null ;

这时候，我们得到的结果是：

同样的道理，我们来实现一开始的问题，先创建这么一张关系表：

CREATE TABLE t (student nvarchar2(20),subject nvarchar2(10),teacher nvarchar2(100)
);INSERT INTO t VALUES('Jim','语文','张三 李四 王五');
INSERT INTO t VALUES('Jim','数学','牛儿');
INSERT INTO t VALUES('Jim','英语','迈克尔 梁山伯');
INSERT INTO t VALUES('Lucy','语文','老五 李四');

接下来，我们实现对teacher这个字段进行拆分，teacher中的每个值是按照空格分开的。

我们实现的代码是这样的：

select student,subject,regexp_substr(teacher,'[^ ]+',1,level) from t
group by student,subject , teacher,level
connect by regexp_substr(teacher,'[^ ]+',1,level) is not null order by 1;

最终结果：

此外，我们还有另外一种方法可以来解决这个问题，前提是我们需要把所有的teacher找出来做一个临时表，

利用like方法以及左连接来拆分

select t.student,t.subject,teacherRecord.teacher
from t left outer join teacherRecord
on t.teacher like '%' || teacherRecord.teacher || '%'

最终结果：

orcle数据库表导出csv文件

废话少说，直接来代码：

set colsep ,
set feedback off
set heading off
set trimout on
spool D:\DBoracle\lfc.csv
select '"' || yyyymm || '","' || yyyymmdd || '","' ||  bu_cd || '"from jim_CALL;
spool off
exit