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MySQL auto fill table with dates

Posted on 2009-07-04
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Last Modified: 2012-05-07
I have a table named "dbDiary" with fields "fDate" and "fDay".
I want to fill "fDate" field with dates starting July 1st, 2009, in format YYYY-MM-DD and for each value to have the "fDay" field populated with the day number (Monday=1, ..., Sunday=7) - up to 2012, December 31st.

Example of dbDiary table:      

fDate           fTable
--------------------------------
20090713      1
20090714      2
20090715      3
20090716      4
20090717      5
20090718      6
20090719      7
20090720      1
20090721      2
20090722      3
20090723      4
20090724      5
20090725      6
20090726      7
20090727      1
20090728      2
etc..

How can I do this?
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Question by:mechanism
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Expert Comment

by:Steve Bink
ID: 24780290
You could build a simple stored procedure to make this happen, but the better question is why you feel you need to.  What is the purpose behind populating the table in this manner?
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Accepted Solution

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snoyes_jw earned 50 total points
ID: 24794063
Insert one record, then insert...select a few times to get the rest of the records:
INSERT INTO dbDiary (fDate) VALUES ('2009-07-01');
 
INSERT INTO dbDiary (fDate) SELECT fDate + INTERVAL (SELECT COUNT(*) FROM dbDiary) DAY FROM dbDiary;
-- Repeat that last insert 10 times, which will populate the table up through 2015
 
DELETE FROM dbDiary WHERE fDate > '2012-12-31';
UPDATE dbDiary SET fDay = DAYOFWEEK(fDate);

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Author Comment

by:mechanism
ID: 24795419
Answering to routinet.

Your comment is valid.
I have a number of tables that need to be loaded each Monday, Tuesday, Wednesday etc. On each day (first column) I want to load files in tables ending in '1' (for example, file blabla.txt into table BlaBla_1, on next day, suppose a Tuesday, file blabla.txt into table BlaBla_2, next day on BlaBla_3 etc).
I need to have a file from each day of the week from another system into MySql but on a weekly basis. Again, using the same example, after a week, I need to overwrite table BlaBla_1 with the new blabla.txt file etc.
 
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Author Comment

by:mechanism
ID: 24795443
Answering to snoyes_jw

Please allow me to get back to you, I am now checking this.. Thank you for comment..
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LVL 33

Expert Comment

by:snoyes_jw
ID: 24795476
Instead of all those separate tables, why not one table, with a field that indicates the day of the week? Then you can delete the old records and insert the new ones, without all the dynamic queries and such that multiple tables imply.

Using 5.1's partitioning would make it even easier.
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Author Closing Comment

by:mechanism
ID: 31599794
Thank you, it worked, and I also made it in a stored procedure.
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