Creation process of Oracle for in loop

Today we are going to discuss with you two examples of Oracle for in loop. I saw the relevant information about the two examples of Oracle for in loop on the relevant website two days ago, I think it will be helpful to the computer community in practice and I will share it with you.

Oracle for in loop one:

1. Build the environment

 
 

  
  
create table ETL_DATE(DATE_CHAR VARCHAR2(8),DATE_DATE DATE);  
  
  
select * from etl_date;  
 
 

2. Code

 
 

  
  
DECLARE  
  
  
v_date date;  
  
  
BEGIN  
  
  
EXECUTE IMMEDIATE 'truncate table etl_date';  
  
  
for v_date in 20091001 .. 20091021 LOOP  
  
  
INSERT INTO etl_date  
  
  
(date_char, date_date)  
  
  
SELECT v_date, to_date(v_date, 'YYYY-MM-DD') FROM dual;  
  
  
END LOOP;  
  
  
COMMIT;  
  
  
END;  
  
  
select * from etl_date;  
 
 

3. Delete the environment

 
 

  
  
drop table etl_date; 
 
 

Note: It is only applicable to cycles within January.

Oracle for in loop II:

1. Build the environment

 
 

  
  
create table SQLTEXT(TEXT VARCHAR2(100));  
  
  
create table HZ(HZ_NAME VARCHAR2(3));  
  
  
INSERT INTO hz(HZ_NAME)values(' ');  
  
  
INSERT INTO hz(HZ_NAME)values('PRE');  
  
  
INSERT INTO hz(HZ_NAME)values('CUR');  
  
  
INSERT INTO hz(HZ_NAME)values('INS');  
  
  
INSERT INTO hz(HZ_NAME)values('UPD');  
  
  
select * from HZ;  
 
 

2. Code

 
 

  
  
declare  
  
  
P_TABLE_NAME varchar2(100) := 'CFA';  
  
  
begin  
  
  
for HZ in (select HZ_NAME from HZ) LOOP  
  
  
insert into sqltext  
  
  
select 'CREATE TABLE ' || REPLACE(P_TABLE_NAME, 'EDW', 'TMP') ||  
  
  
HZ.HZ_NAME || ' AS select * from ' || P_TABLE_NAME ||  
  
  
' where ROWNUM<1'  
  
  
from dual;  
  
  
END LOOP;  
  
  
end;  
  
  
select * from SQLTEXT;  
 
 

3. Clear the environment

 
 

  
  
drop table SQLTEXT;  
  
  
drop table HZ;  
  
  
powershell   
 
 

The above content is an introduction to the Oracle for in loop examples. I hope you will have some gains.