PEP 0249 - Python Database API Specification v2.0¶

This PEP is overall internal DBAPI core for Python

paramstyle String constant stating the type of parameter marker formatting expected by the interface. Possible values are [2]: paramstyle Meaning qmark Question mark style, e.g. ...WHERE name=? numeric Numeric, positional style, e.g. ...WHERE name=:1 named Named style, e.g. ...WHERE name=:name format ANSI C printf format codes, e.g. ...WHERE name=%s pyformat Python extended format codes, e.g. ...WHERE name=%(name)s

https://peps.python.org/pep-0249/#constructors