/usr/share/sip/PyQt5/QtSql/ is in pyqt5-dev 5.7+dfsg-5.
This file is owned by root:root, with mode 0o755.
..
/usr/share/sip/PyQt5/QtSql/QtSqlmod.sip
/usr/share/sip/PyQt5/QtSql/qsql.sip
/usr/share/sip/PyQt5/QtSql/qsqldatabase.sip
/usr/share/sip/PyQt5/QtSql/qsqldriver.sip
/usr/share/sip/PyQt5/QtSql/qsqlerror.sip
/usr/share/sip/PyQt5/QtSql/qsqlfield.sip
/usr/share/sip/PyQt5/QtSql/qsqlindex.sip
/usr/share/sip/PyQt5/QtSql/qsqlquery.sip
/usr/share/sip/PyQt5/QtSql/qsqlquerymodel.sip
/usr/share/sip/PyQt5/QtSql/qsqlrecord.sip
/usr/share/sip/PyQt5/QtSql/qsqlrelationaldelegate.sip
/usr/share/sip/PyQt5/QtSql/qsqlrelationaltablemodel.sip
/usr/share/sip/PyQt5/QtSql/qsqlresult.sip
/usr/share/sip/PyQt5/QtSql/qsqltablemodel.sip