PQnfields
C++ ubuntu install libpq-fe.h PGconn PQconnectdb PGresult PQexec PQnfields PQntuples PQfname PQgetvalue
1.Install libpq-dev sudo apt install libpq-dev locate libpq-fe.h /usr/include/postgresql/libpq-fe.h 2.main.cpp #include <chrono> #include <fstream> #i ......