My SQL is not Working

My SQL is not working.

Command: mysql
Error: ERROR 1049 (42000): Unknown database ‘db_GULAMGAUS’

Command: mysql -u GULAMGAUS -p npower123
Enter password:

Error: ERROR 1045 (28000): Access denied for user ‘GULAMGAUS’@‘localhost’ (using password: YES)

Kindly assist ASAP.

Thanks & Regards,
GulamGaus Siddiqui.

updated your records, please try running mysql again. @GULAMGAUS thanks