Need help... As a very basic beginner.

1 create a table with three columns, call NEXT_BUS_DAY. Write a query (or queries) to fill the table as follows: each date of the month for April 2006 stored as a date in the first column. The second column contains the day of the month as characters, such as Friday. The third column stores the day after day in column 2. For example, Saturdays and Sundays are not working days, so if two column Friday, then three-column will contain Monday. (Not considered holidays for this problem). Tip: On TO_CHAR mask 'DAY' returns the same padded characters number of namespaces of the day like the day with the longest.

Hello

user13417896 wrote:
INSERT INTO NEXT_BUS_DAY
WITH got_mdate AS
(

Select level as DateRange + to_date('&date','MM YYYY')-1
of the double
where (to_date ('& date', 'MM YYYY')-level 1 +)<= last_day(to_date('&date','mm="">
connect by level<=31>

WITH got_mday AS
(
SELECT TO_CHAR (mdate, 'DAY') AS mday
OF the double
)
Select this OPTION, mday
CASE
WHEN mday IN ("SATURDAY", "SUNDAY")
THEN 'weekend '.
ANOTHER "work day".
END AS type_o_day
OF got_mday
;

Can u help me pls inthi final step...

What stage is this?
What is the request (or the INSERT statement, if you insist on the conduct of an INSERT at this point) which worked correctly?
What problem receive you at this stage?

The example I gave before illustrates how you can assign an alias in a subquery and use this alias in a query Super. If you see something in it that you can use in this problem, so much the better, but I have never said that all or part of it could be directly copied on your return.

Looks like you have a subquery to work now:

DEFINE  date = "04 2006"

WITH     got_mdate        AS
(
select to_date('&date','MM YYYY')-1 + level as DateRange
      from    dual
      where   (to_date('&date','MM YYYY')-1+level) <= last_day(to_date('&Date','MM YYYY'))
      connect by level<=31
)
SELECT     *
FROM     got_mdate
;

Output:

DATERANGE
-----------
01-Apr-2006
02-Apr-2006
03-Apr-2006
...
29-Apr-2006
30-Apr-2006

So far so good.
What is the next step? How can you modify this query to bring you a little more towards your goal?
You're going to add another column to this result include? What will be in the new column? What functions or other expressions can you use to get it?

Published by: Frank Kulash, December 6, 2010 16:39

More I think about this problem, less I like the plan I originally described for you. Sorry for the bad suggestion.
It would be simpler if you wrote an INSERT statement for poulate only mdate column. The query you have above is sufficient for this. You won't a cluase WITH or any kind of subquery; Since you will not need to reference an alias anywhere.
After that you have populated mdate column, write an UPDATE statement to fill the column mday, using the value already in mdate.
After that you have populated mday column, write another UPDATE statement to populate the nbday column, using the value already in mday.

It won't be as effective (in terms of computer resources) than writing a single subquery.
I think it will be much more effective in terms of your time and effort, and also what seems best for you to learn at this stage.
On a real job, you could make a similar decision. If you're only taliking about 30 lines and you just have to do this once, then you probably won't do much damage, no matter how inefficient the UPDATE statements are.

You can only fill in the column mdate?

INSERT INTO nex_bus_day (mdate)
SELECT TO_DATE ...

Tags: Database

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