When you access the SQL Server database, the system prompts "invalid XXX object name"

symptom:	when you access the SQL Server database, the system prompts "invalid XXX Object Name"
root cause:	the user may be a database user, but the database does not grant the user the corresponding access permission
solution:	assign permissions to database users. For details, see. 1. Assume that the database name is "happy" and the user name is "Haha. 2. Choose "Happy Database"> "user"> "new database user"> "Log on name"> "new"> enter "Haha"> "Confirm Password"> the Haha account is successfully created. * Note: Select SQL for identity authentication. The default database is happy, and the server role is db_owner. Remember to select happy for database access. * supplement: if the server role in the intermediate step is not selected, use the new account and password to access the server, the following error occurs: "sqlserver rejects the select permission on the object 'hello' (Database 'Happy ', owner 'dbo')" and selects db_owner again in the account attributes, you can also tick the "Select Insert update Delete" and other items to access the table in the permission settings. in this case, run the Program again and you will see the successfully accessed page.