Solved

SQL in Oracle

Posted on 2014-02-05
4
461 Views
Last Modified: 2014-02-05
Hello Experts,

I have two tables which should contain dates but the issue is like one table is having varchar2 column and another is as date.

Now for example I have one table like source :

create table  sloba_date_1
(
END_DATE                   VARCHAR2(4000),
START_DATE                 VARCHAR2(4000)
);

Open in new window


Where I have data like :

BEGIN
insert into sloba_date_1 values('23-JAN-14','23-JUN-14');
INSERT INTO sloba_date_1 VALUES('2-JAN-14','23-JUN-14');
insert into sloba_date_1 values('23 01 14','23 2 14');
INSERT INTO sloba_date_1 VALUES('23-JAN-14','23-JUN-14');
COMMIT;
END;

Open in new window


SQL> select * from sloba_date_1 ;
END_DATE                                                                         START_DATE
-------------------------------------------------------------------------------- --------------
23-JAN-14                                                                        23-JUN-14
2-JAN-14                                                                         23-JUN-14
23 01 14                                                                         23 2 14
23-JAN-14                                                                        23-JUN-14

Open in new window


Now I want o insert into the other target table i.e. like :

CREATE TABLE sloba_date_stg
(
END_DATE                   DATE,
START_DATE                 DATE         
)
;

Open in new window


Issue is like I have the data like "23 2 14"  which need to be converted as "23-FEB-14" on both columns.


So finally the data should be inserted into the target table i.e. sloba_date_stg

the data should look like :

END_DATE                                                                         START_DATE
-------------------------------------------------------------------------------- --------------
23-JAN-14                                                                        23-JUN-14
2-JAN-14                                                                         23-JUN-14
23-JAN-14                                                                         23-FEB-14
23-JAN-14                                                                        23-JUN-14

Open in new window

0
Comment
Question by:Swadhin Ray
  • 3
4 Comments
 
LVL 142

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 500 total points
ID: 39835192
something like this might do:
select to_date( start_date
, case when start_date like '%-%-%' then 'dd-MON-yy' 
else 'dd m yy' 
end) new_start_date
, to_date( end_date
, case when end_date like '%-%-%' then 'dd-MON-yy' 
else 'dd m yy' 
end) new_end_date
 from sloba_date_1 ;

Open in new window

this will "fail" if any of the values does not match the pattern above, you can add more "when  ... then" lines above to catch more pattern
0
 
LVL 16

Author Comment

by:Swadhin Ray
ID: 39835229
If i used the same set of the data that I have provided , and using the SQL provided by you getting me the below error:

SELECT to_date(start_date
              ,CASE
                       WHEN start_date LIKE '%-%-%' THEN
                        'DD-MON-YY'
                       ELSE
                        'dd m yy'
               END) new_start_date
      ,to_date(end_date
              ,CASE
                       WHEN end_date LIKE '%-%-%' THEN
                        'DD-MON-YY'
                       ELSE
                        'dd m yy'
               END) new_end_date
  FROM sloba_date_1
 
ORA-01821: date format not recognized
 

Open in new window

0
 
LVL 16

Author Comment

by:Swadhin Ray
ID: 39835236
ok got it:

select to_date( start_date
, case when start_date like '%-%-%' then 'dd-MON-yy' 
else 'dd mm yy' 
end) new_start_date
, to_date( end_date
, case when end_date like '%-%-%' then 'dd-MON-yy' 
else 'dd mm yy' 
end) new_end_date
 from sloba_date_1 ;

Open in new window

0
 
LVL 16

Author Closing Comment

by:Swadhin Ray
ID: 39835237
Thanks a ton.

Regards,
Sloba
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Cursors in Oracle: A cursor is used to process individual rows returned by database system for a query. In oracle every SQL statement executed by the oracle server has a private area. This area contains information about the SQL statement and theā€¦
Checking the Alert Log in AWS RDS Oracle can be a pain through their user interface.  I made a script to download the Alert Log, look for errors, and email me the trace files.  In this article I'll describe what I did and share my script.
Via a live example show how to connect to RMAN, make basic configuration settings changes and then take a backup of a demo database
This video shows how to copy a database user from one database to another user DBMS_METADATA.  It also shows how to copy a user's permissions and discusses password hash differences between Oracle 10g and 11g.

773 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question