SQL Server is a relational database
management system (RDBMS) by Microsoft that is designed for the
enterprise environment. It has got two primary query languages, T-SQL
and ANSISQL. It provides you the flexibility to access your database
from anywhere, be it from a data center, desktop, or from a mobile
device. It also provides the combined services to query, search,
synchronize, report, and analyze the database records. However, at
times it may happen that the SQL Server is unable to run. It may be
possible that the master database has gone corrupt. This can be
possible because of various reasons such as virus infections, human
errors, power outages, abrupt system shutdown while SQL Server was
open. In such cases, you should replace the corrupted database with
its updated backup. However, if the backup is not updated then you
should use MS SQL recovery software to recover SQL
database.
While working with SQL, you might encounter access denied error in
the event viewer log. It happens because the SQL Express tries to
open the Master database from C:\Program Files\Microsoft SQL
Server\MSSQL.1\MSSQL\DATA\master.mdf. However, the SQL Server does
not have the permission to run this. You need to try following the
below mentioned steps to resolve this issue.