I want 3 columns to have 9 different values, like a list in Python.
Is it possible? If not in SQLite, then on another database engine?
I want 3 columns to have 9 different values, like a list in Python.
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I want 3 columns to have 9 different values, like a list in Python.
Is it possible? If not in SQLite, then on another database engine?
You must serialize the list (or other Python object) into a string of bytes, aka “BLOB”;-), through your favorite means (
marshalis good for lists of elementary values such as numbers or strings &c,cPickleif you want a very general solution, etc), and deserialize it when you fetch it back. Of course, that basically carries the list (or other Python object) as a passive “payload” — can’t meaningfully use it inWHEREclauses,ORDER BY, etc.Relational databases just don’t deal all that well with non-atomic values and would prefer other, normalized alternatives (store the list’s items in a different table which includes a “listID” column, put the “listID” in your main table, etc). NON-relational databases, while they typically have limitations wrt relational ones (e.g., no joins), may offer more direct support for your requirement.
Some relational DBs do have non-relational extensions. For example, PostGreSQL supports an array data type (not quite as general as Python’s lists — PgSQL’s arrays are intrinsically homogeneous).