I have received following questions. I will list all the questions here and answer them together.
What is the purpose of Master database?
SQL SERVER – 2005 – Get Current User – Get Logged In User
How to get current user for a query in SQL Server 2005: SELECT SYSTEM_USER returns the name of the current context, which helps with debugging and security.
SQL SERVER – Get Permissions of My Username / Userlogin on Server / Database
Invited to review a big company’s schema, I wanted to know my own permissions without asking their DBA. fn_my_permissions shows them at server and database level.
SQL SERVER – Difference Between @@Version and xp_msver – Retrieve SQL Server Information
SELECT @@Version gives the SQL Server version, edition and service pack in one string. I compare @@Version and xp_msver, which returns more server details.
SQL SERVER – 2005 – List All The Constraint of Database – Find Primary Key and Foreign Key Constraint in Database
A simple script from my archive lists all constraints from sys.objects, so you can check each foreign key and primary key constraint in database tables.
SQL SERVER – 2005 – Find Tables With Primary Key Constraint in Database
A script to find tables with primary key constraint in a SQL Server 2005 database, listing the index name, table name and column name from sys.indexes.
SQL SERVER – 2005 – Find Tables With Foreign Key Constraint in Database
A foreign key inventory needs both the constraint and its column pairings. I include schema names to identify each table clearly.