如何在 python sqlite3 命令中将变量作为列名和表名传递？

Question

I am trying to pass a table name and a column name into a sqlite command in python. From what I understand, this can't be done through traditional methods.

conn.execute('ALTER TABLE ? ADD COLUMN ?;', t)

I've tried

{}.format

":X",(X: t)

and a few others, any assistance would be greatly appreciated

Answer 1

Use str.format :

conn.execute('ALTER TABLE {} ADD COLUMN {};'.format(table, column))

or if you're using Python 3.6+, you can use f-strings:

conn.execute(f'ALTER TABLE {table} ADD COLUMN {column};')