In SQLite, foreign keys are not enforced by default. It references to the primary key of the Authors table. that it is a zero size file, but SQLite Studio opens it with no problem. The AuthorId column of the Books table has a foreign key constraint.
when you insert the rows, as Foreign Key support hasn't been turned on the foriegn key constraint conflict doesn't happen and the rouge row is inserted.Īs such you need to call setForeignKe圜onstraintsEnabled(true) in onConfigure for Foreign Key Support to be available in onCreate.Į.g. Tip: If the command 'PRAGMA foreignkeys' returns no data instead of a single row containing '0' or '1', then the version of SQLite you are using does not support foreign keys (either because it is older than 3.6.19 or because it was compiled with SQLITEOMITFOREIGNKEY or SQLITEOMITTRIGGER defined). I use it for spatial as well as non spatial databases, but if I want to create. Python, SQLite, and SQLAlchemy give your programs database functionality, allowing you to store data in a single file without the need for a database server.
#Sqlitestudio foreign key not working update
You are using safe update mode and you tried to update a table. All programs process data in one form or another, and many need to be able to save and retrieve that data from one invocation to the next. The following column constraints that should be enforced when data is inserted: NOT NULL PRIMARY KEY UNIQUE CHECK FOREIGN KEY.
I believe that your issue is that you are using db.setForeignKe圜onstraintsEnabled(true) too late and thus Foreign Key support is not on when you insert the rows in the onCreate method. Work around for mutating problem in Oracle Triggers.
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