Solved

SQL in Oracle

Posted on 2014-02-05
4
457 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

Suggested Solutions

Title # Comments Views Activity
I want to write a query to populate column values based on another column 1 49
report returning null 21 79
grouping on time windows 6 41
SQL query question 8 35
Subquery in Oracle: Sub queries are one of advance queries in oracle. Types of advance queries: •      Sub Queries •      Hierarchical Queries •      Set Operators Sub queries are know as the query called from another query or another subquery. It can …
I remember the day when someone asked me to create a user for an application developement. The user should be able to create views and materialized views and, so, I used the following syntax: (CODE) This way, I guessed, I would ensure that use…
This video shows how to configure and send email from and Oracle database using both UTL_SMTP and UTL_MAIL, as well as comparing UTL_SMTP to a manual SMTP conversation with a mail server.
This video shows how to copy an entire tablespace from one database to another database using Transportable Tablespace functionality.

911 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

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now