#SQLITESTUDIO CHECK CONSTRAINTS OR SOFTWARE#
I have many tables that are used in software as a data source and i am inserting manually new data in manager, because i have such soft that only using (reading) database.įor me using defaults in manager is very useful thing. In my example I am using managers like yours and access to inserts new rows in it. Of course user can change it to another from default. Table was design to have default because it is default, default means default not NULL. I think if table is design with default values then it is strange if user is surprised with prefilled defaults. If you know how they handle cases like above (with sequence, or virtually any stateful default value), feel free to explain and we will see if that's doable with SQLite. I guess Access have it figured out somehow. There is no consistent way of implementing it the way you want, because soon after it works that way, someone else will come here and report issue, that it works wrong. Or you can use INSERT statements as you did above. You can declare NOT NULL if you want to use DEFAULT value by default. If your DEFAULT expression uses some function that has a state (for example it is a sequence implemented with a function), the pre-loaded value that you show in UI will increment the sequence and it will stay incremented, even if you decide to cancel this new row addition. Well, in most cases it will work fine, but not in all. So how about pre-filling columns with DEFAULT values, like in Access and let user decide what to do (leave default or set to NULL)? So what about skipping these, that have NULL value and have DEFAULT defined? Well, what if you do want to insert NULL value and not the DEFAULT one? It is valid to insert NULL. How would it know which should it skip? In the grid you have all columns visible and you commit them all. When you commit new row it has to insert all columns explicitly. Now let's consider how SQLiteStudio (or basically any DB tool that allows insertion from Grid) works. VARCHAR (255) DEFAULT ,īeta Was this translation helpful? Give feedback.
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