Error : Property Size is not available for Database "[tempdb]"

Today when I clicked Properties of tempdb in SSMS, I got the error message below:

At first I thought the database...

Use application lock to synchronize T-SQL code

Application lock can be used to synchronize T-SQL code, you can control if the session is able to run the...

log shipping restore job failed on secondary server

Several Situation will cause the log shipping restore job failed on secondary server

1. Restore job is not able to access the...

"Failover Partner" keyword in connection string - Q&A

1. How to connect client to a Database Mirroring Session with failover aware
A: add FailoverPartner keyword in the connection string,...

One Database Mirror disconnected case

Today I got a database mirror case, I was told the all databases were in disconnected\in recovery status on both...

is count(1) faster than count(*)?

Recently I saw a post regarding the count(1) and count(*)
http://www.sqlservercentral.com/articles/T-SQL/102474/
the post said "You know that doing COUNT(*) on a table with...

Enable Instant File Initialization to accelerate database restore

Today my colleague come to me and ask me why her database restore query was hang. She was going to...

List all mapping users of SQL login account

Find a useful system store procedure to list all mapping user of SQL login account.

sp_msloginmappings @Loginname , @Flags
@loginname: the login account name, If...

Get SQL Command Compile time

1. SET STATISTICS TIME ON
It not only tell you the compile time of sql command, but also show you the...

SQL Server 2012 Express installation failed issue

I got an strange error when installing SQL Server 2012 Express

Environment:Window Server 2008 R2 Enterprise + SP1Microsoft Visual Studio 2012 installed.Net...