Turn to the great god! Eclipse connection SQL sever2019 failed, the reason is: through port 1433 to connect to the host 127.0.0.1 TCP/IP connection fails, according to this approach found on the SQL configuration manager always show MMC cannot create management unit, the management unit may not be installed correctly, the path environment variable has changed many times to use inside, what should I do ah, turn to the great god!!!!!!!!!!!!!!!!!!!!!!!