SQLite Walkthrough

[mbkowns]

I have looked around these forums on how to use SQLite but some of my questions are not answer.

If I want to use a SQLite database stored as a file and have multiple users using it is this possible?

Is there anyway in GUI interface to build the database?

[Pain]

SQLite_Gui: http://www.autoitscript.com/forum/index.php?showtopic=17099

[mbkowns]

I read there but I am not sure since people go back and forth on it. Can I write to the same database file with multiple users at the same time?

[PsaltyDS]

I read there but I am not sure since people go back and forth on it. Can I write to the same database file with multiple users at the same time?

No. You can have it open by multiple users, and they can all read/select at the same time, but not write changes at the same time. There is a file lock mechanism that returns SQLite_Busy if concurrent changes are attempted. From the SQLite.au3 UDF:

Global Const $SQLITE_BUSY = 5 ; /* The database file is locked */

If you expect the possibility of multiple users writing changes about the same time, check for $SQLITE_BUSY in the return and just repeat the change operation (i.e. UPDATE) after a random delay (say, 100 to 1000 msec).

See SQLite FAQ for some warnings about MS Windows CIFS share bugginess.

Edited October 21, 2008 by PsaltyDS