How do I get around not being able to parse a table name into a python sqlite query?

问题

I have a python3 program that I'm making which uses a sqlite database with several tables, I want to create a selector module to allow me to chose which table to pull data from.

I have found out that I can't use parameter substitution for a table name as shown bellow, so I'm looking for some alternative methods to accomplish this.

c.execute("SELECT * FROM ? ", DB)

Any ideas?

回答1:

Right. You can not use parameter substitution to specify the table. So instead you must do string manipulation:

c.execute("SELECT * FROM {t} ".format(t=tablename))

回答2:

I don't know if this is a python3 thing but it seems easiest to just do this:

c.execute("SELECT * FROM %s "% tablename)

回答3:

Blockquote * Right. You can not use parameter substitution to specify the table. So instead you must do string manipulation: c.execute("SELECT * FROM {t} ".format(t=tablename))* Blockquote

Thanks unutbu, this is just what I needed.

来源：https://stackoverflow.com/questions/4044512/how-do-i-get-around-not-being-able-to-parse-a-table-name-into-a-python-sqlite-qu