[Webinar] Streamline your web hosting managementRegister Today

x
?
Solved

Oracle trigger for the day name of the week

Posted on 2013-12-12
8
Medium Priority
?
911 Views
Last Modified: 2013-12-16
I am saving values to a table and I have a date that I need to get the DayOfWeek saved to another column. I want to do it in a proc or maybe in a trigger? I am not sure what the syntax is. I know in MySQL I can use DAYNAME('12/12/2103') and it would return Thursday but Im not sure what it is in Oracle.

Thanks
JK
0
Comment
Question by:jknj72
8 Comments
 
LVL 74

Expert Comment

by:sdstuber
ID: 39715137
to_char(sysdate,'fmDay')
0
 
LVL 78

Assisted Solution

by:slightwv (䄆 Netminder)
slightwv (䄆 Netminder) earned 1000 total points
ID: 39715139
try this:
select to_char(to_date('12/12/2103','MM/DD/YYYY'),'Day') from dual;

It's all about the format masks.  The online docs for your version will show you what they all are.
0
 
LVL 74

Accepted Solution

by:
sdstuber earned 1000 total points
ID: 39715148
you might not want to use 'Day'  because that will right pad the names

'fmDay' will have them trimmed

for a trigger to do it, it might look something like this...


CREATE OR REPLACE TRIGGER trg_your_table_briu
    BEFORE INSERT OR UPDATE
    ON yourtable
    FOR EACH ROW
BEGIN
     :new.dayofweek := to_char(:new.your_date_column,'fmDay');
END;
0
The new generation of project management tools

With monday.com’s project management tool, you can see what everyone on your team is working in a single glance. Its intuitive dashboards are customizable, so you can create systems that work for you.

 
LVL 78

Expert Comment

by:slightwv (䄆 Netminder)
ID: 39715166
If you are using 11g or above, I would look at using Virtual Columns.

These are derived when the column is selected and not permanently stored. Then you don't have to worry about triggers or procedures.

Check the example in the docs:
http://docs.oracle.com/cd/E11882_01/server.112/e25494/tables.htm#ADMIN11004

...
 hrly_rate  NUMBER(7,2) GENERATED ALWAYS AS (sal/2080),
...

hrly_rate is derived based on the sal column's value.
0
 
LVL 32

Expert Comment

by:awking00
ID: 39715300
I calculated 12/12/2103 to be a Wednesday. Did I do something wrong?
0
 
LVL 78

Expert Comment

by:slightwv (䄆 Netminder)
ID: 39715414
>>Did I do something wrong?

The typo of 2013?
0
 
LVL 12

Expert Comment

by:stefan73
ID: 39715450
Why do you want to store the weekday in a column? This results in de-normalized data. Use a view (or virtual column) for this.
0
 

Author Closing Comment

by:jknj72
ID: 39721398
I decided to split points with you two. Thank you both for your help.
0

Featured Post

Never miss a deadline with monday.com

The revolutionary project management tool is here!   Plan visually with a single glance and make sure your projects get done.

Question has a verified solution.

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

MSSQL DB-maintenance also needs implementation of multiple activities. However, unprecedented errors can hamper the database management. In that case, deploying Stellar SQL Database Toolkit ensures fast and accurate database and backup repair as wel…
Among the most obnoxious of Exchange errors is error 1216 – Attached Database Mismatch error of the Jet Database Engine. When faced with this error, users may have to suffer from mailbox inaccessibility and in worst situations, permanent data loss.
This video shows how to Export data from an Oracle database using the Original Export Utility.  The corresponding Import utility, which works the same way is referenced, but not demonstrated.
In this video, Percona Solutions Engineer Barrett Chambers discusses some of the basic syntax differences between MySQL and MongoDB. To learn more check out our webinar on MongoDB administration for MySQL DBA: https://www.percona.com/resources/we…
Suggested Courses

591 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