If a user is a member of db_datareader, which grants access to a table, and db_denydatareader, which denies access to a table, which role will take precedent? That’s the question someone on LinkedIn recently posted in the SQL Server Administrators group recently. Here’s a link to the question. The LinkedIn poster essentially wanted to know…
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Backup and restore? Log shipping? Maybe Failover Clustered Instances or Availability Groups can be used? Oh, what about Azure or another cloud provider? Some data centers offer “push button DR,” will that work? There are so many options. Where should we start with Disaster Recovery for our SQL Server? The point of Disaster Recovery Disasters…
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The call comes in. “Something’s happened. We need to restore the production database. Can you do it? And how long will it take?” No DBA wants to receive that call but, frankly, answering those calls and the ensuing questions are part of a DBA’s job. And there’s no better way to know that you can,…
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Some things are scary. Other things are dangerous. And in SQL Server, you can have both scary and dangerous at the same time. Scary, that we can deal with. But dangerous, particularly things that are deceptively dangerous, is bad. Scary things Let’s start with scary. Some things give us pause. We see them, think about…
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Conserving energy is good. It’s good for the environment and it’s good for the bottom line. That’s why Windows Server has built-in power settings. But there’s a trade off. With reduced power comes reduced performance for most SQL Servers. The Windows Power Plan Setting Windows Server has three pre-defined power settings: Balanced, High Performance, and…
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Views in SQL Server are really just queries that have been given a name so that they can be referenced as if they are tables. This can be convenient, especially for code reuse. However, it can also have some unanticipated consequences. Let’s look at an example. Let’s consider the affect joining two views can have…
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“People don’t want to buy a quarter-inch drill. They want a quarter-inch hole!” In the world of databases, stakeholders don’t care about SQL backups. They care about the ability to restore a SQL database.
In SQL Server, when someone creates a database, they own it. That means they have elevated permissions on the database. The SQL Server database owner can change configuration parameters, perform maintenance, and grant permissions on the database to other users. The database owner can even drop the database altogether. In highly secure environments (and what…
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Fortunately, DBCC CHECKDB will log each time it completes without finding any errors or corruption in the database. That’s known as the Last Known Good date. Let’s look at three ways you determine the Last Known Good date. We’ll use a T-SQL query, a PowerShell command with dbatools, and the SQL Server Logs via Management Studio.
Checking the number of tempdb data files is straightforward. Here are three easy ways: one graphical, one T-SQL, and one PowerShell, so you can use your tools of choice.
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