用一个例子说明oracle临时表，创建过程，

Posted 2020-10-12 大战风车的男人

--创建临时表，规定好格式，是必须的，不同于sqlserver那么随意；

Create Global Temporary Table record4

(

  yljgdm VARCHAR2(22) not null,

  jzlsh VARCHAR2(50) not null,

  kh VARCHAR2(32),

  klx VARCHAR2(16),

  hzxm VARCHAR2(32),

  jzlx VARCHAR2(3),

  zzysgh VARCHAR2(16),

  zzysxm VARCHAR2(32),

  jzksmc VARCHAR2(30),

  jlgxsj DATE default Sysdate,

  zbdm VARCHAR(22)

)

on commit preserve rows;

 

Create Global Temporary Table fee

(

  jzlsh VARCHAR2(50) not null,

  mxxmje NUMBER(15,3) default 0,

  tfbz VARCHAR2(1) not null

 

)

on commit preserve rows;

 

 

--运行经过调试的脚本，插入数据到临时表中

 

insert into record4(yljgdm,jlgxsj,zzysgh,zzysxm,jzksmc,zbdm,jzlsh,kh,klx,hzxm,jzlx)

select A.YLJGDM,A.JLGXSJ,A.ZZYSGH,A.ZZYSXM,A.JZKSMC,‘MJZYZB‘,A.JZLSH,A.KH,A.KLX,A.HZXM,A.JZLX from CEN_CORE_V20.TB_YL_MZ_MEDICAL_RECORD A WHERE TO_CHAR(add_months(sysdate,-1),‘yyyymm‘)=to_char(A.JLGXSJ,‘yyyymm‘) ;

--select * from record4;

 

insert into fee

select B.jzlsh,sum(B.mxxmje),B.TFBZ from CEN_CORE_V20.TB_HIS_MZ_FEE_DETAIL B where TO_CHAR(add_months(sysdate,-1),‘yyyymm‘)=to_char(B.stfsj,‘yyyymm‘) and B.Mxfylb in(‘12‘,‘13‘,‘14‘)

group by B.jzlsh,B.TFBZ;

 

--select * from fee;

 

--select * from biolap.tb_yljg_sjzl_hz;

--经过处理之后的数据，经过运行之后插入到目标表

insert into biolap.tb_yljg_sjzl_hz(yljgdm,tjsj,ysgh,ysxm,ksmc,zbdm,jzlsh,kh,klx,hzxm,jzlx,mxxmje)

select A.YLJGDM,to_char(A.JLGXSJ,‘yyyymm‘),A.Zzysgh,A.Zzysxm,A.JZKSMC,A.Zbdm,A.Jzlsh,A.Kh,A.Klx,A.Hzxm,A.Jzlx,

  sum(case when B.TFBZ=‘1‘ then B.MXXMJE when B.TFBZ=‘2‘ then -1*B.MXXMJE else 0 end ) je from record4 A,fee B

where A.JZLSH=B.JZLSH

group by a.yljgdm,to_char(A.JLGXSJ,‘yyyymm‘),A.Zzysgh,A.Zzysxm,A.Jzksmc,A.zbdm,A.jzlsh,A.kh,A.klx,A.Hzxm,A.Jzlx;

 

--删除目标表中有可能出现问题的东西（其实不应该写在这里，但是因为程序的每次查询都要用到该列，所以这么写也可以）

delete from biolap.tb_yljg_sjzl_hz where yljgdm is null;

 

--提交

commit;

--这种preserve类型的临时表是以会话为单位的，就算提交，临时表中的数据还会存在

--另一种delete类型的临时表，是以事务为单位的，提交之后表会仍然存在，但是表内部的数据就会清空

--为了避免混乱，直接删除临时表，避免出现更新表结构之后提示表名被占用，或者错误的沿用上一次返回的数据

drop table record4;

drop table fee;

 

--select * from biolap.tb_yljg_sjzl_hz where zbdm=‘MJZYZB‘;