SQLite supports CAST and:
Casting an INTEGER or REAL value into TEXT renders the value as if via sqlite3_snprintf() except that the resulting TEXT uses the encoding of the database connection.
So you can do things like this:
select cast(some_integer_column as text) from some_table;
Or, depending on what you're trying to do, you could just treat the numbers as strings and let SQLite coerce the types as it sees fit:
select some_int || ' pancakes' from some_table;
select some_int || '' from some_table;
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