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<mailto: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<mailto:oskars93 at yahoo.com>] Gesendet: Mittwoch, 04. M?rz 2015 16:42 An: sqlite-users at mailinglists.sqlite.org<mailto: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. _______________________________________________ sqlite-users mailing list sqlite-users at mailinglists.sqlite.org<mailto:sqlite-users at mailinglists.sqlite.org> http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users ___________________________________________ 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<mailto: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, privileged or legally protected. Any unauthorized use or dissemination of this communication is strictly prohibited. If you have received this communication 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. ___________________________________________ 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, privileged or legally protected. Any unauthorized use or dissemination of this communication is strictly prohibited. If you have received this communication 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.
