I just created for each day a seperate column is this worse than your approach?
Hick Gunter <hick at scigames.at> schrieb am 8:01 Donnerstag, 5.M?rz 2015:
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div.yiv6530489154WordSection1 {}#yiv6530489154 Since you give no indication of
the schema you are using: ? Create table task (id integer primary key, ?.);
Create table todo ( task_id integer, day_no integer, foreign key (task_id)
references task (id ) on delete cascade on update cascade ?); Create unique
index todo_day on todo (day_no, task_id); Create unique index todo_task on
todo(task_id, day_no); ? -- what to do on day x Select task.* from todo join
task on task.id = todo.task_id where todo.dayno = ? [ORDER BY ?]; ? -- when to
do task x Select dayno from todo where task_id = ? [ORDER BY ?]; ? -- when to
do which tasks that match Select todo.dayno,task.* from task join todo on
task.id = todo.task_id where ? [ORDER BY]; ? ? Von: Oskar Schneider
[mailto:oskars93 at yahoo.com]
Gesendet: Mittwoch, 04. M?rz 2015 18:57
An: Hick Gunter
Betreff: Re: AW: [sqlite] Bitfield in Sqlite3-Table ? With normalize you mean
i should create a column for each integer-column for each bit? What is the
fastest approach for queries? (omit 1. since i don't want to use external
software) ? Hick Gunter <hick at scigames.at> schrieb am 17:19 Mittwoch,
4.M?rz 2015: ? In order of preference
a) use FastBit software
b) normalize your database design to eliminate the array
c) use a BLOB of 125 bytes and user defined functions to operate on them
d) use a string of 1000 characters ('0' or '1') and the SUBSTR() function
-----Urspr?ngliche Nachricht-----
Von: Oskar Schneider [mailto:oskars93 at yahoo.com]
Gesendet: Mittwoch, 04. M?rz 2015 16:42
An: sqlite-users at mailinglists.sqlite.org
Betreff: [sqlite] Bitfield in Sqlite3-Table
Hello,
what is the best way to implement a Bitfield of size 1000 as a column in a
Table. I need to make queries to select all rows which have the nth bit set?The
bitfield describes for each day in about three years if a specific task needs
to be done.
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___________________________________________
Gunter Hick
Software Engineer
Scientific Games International GmbH
FN 157284 a, HG Wien
Klitschgasse 2-4, A-1130 Vienna, Austria
Tel: +43 1 80100 0
E-Mail: hick at scigames.at
This communication (including any attachments) is intended for the use of the
intended recipient(s) only and may contain information that is confidential,
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in error, please immediately notify the sender by return e-mail message and
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? ?___________________________________________
Gunter Hick
Software Engineer
Scientific Games International GmbH
FN 157284 a, HG Wien
Klitschgasse 2-4, A-1130 Vienna,Austria
Tel: +43 1 80100 - 0
E-Mail:?hick at scigames.at
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intended recipient(s) only and may contain information that is confidential,
privileged or legally protected. Any unauthorized use or dissemination of this
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in error, please immediately notify the sender by return e-mail message and
delete all copies of the original communication. Thank you for your cooperation.
