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Any record deleted from SQL Server is not actually deleted from its physical data pages but marked as “To BE DELETED” or “GHOSTED” by changing a bit in the row header. These records will be cleaned up by an internal process that is called the ghost cleanup process.
This is a single-threaded background process that automatically runs on some intervals to check if any page is marked for ghost records or not and if it finds any, then it physically removes those ghosted records from pages. When a full text query is received by the SQL Server query processor, it is handed over to the FTS how to become a sql server dba query processor in the Search process. The FTS query processor breaks up the query into the constituent words, filters out the noise words, and uses an inbuilt thesaurus to find out the linguistic variants for each word. The words are then queried against the inverted index and a rank of their accurateness is computed.
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We like to say we’re SQL Server experts, but our true expertise lies in making your databases work better for your business. Our remote DBAs collaborate, customize, and optimize with your goals, challenges, and budget in mind.
- Database performance is the optimization of resource usage to increase throughput and minimize contention, enabling the largest possible workload to be processed.
- SQL Server also provides the optimistic concurrency control mechanism, which is similar to the multiversion concurrency control used in other databases.
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- It can also act as a scripting language to create and run a set of SQL statements as a script.
- The sequence of actions necessary to execute a query is called a query plan.
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All operations that can be invoked on SQL Server are communicated to it via a Microsoft-defined format, called Tabular Data Stream . TDS is an application layer protocol, used to transfer data between a database server and a client. Consequently, access to SQL Server is available over these protocols. In addition, the SQL Server API is also exposed over web services. MS SQL Server is a relational database management system developed by Microsoft. This product is built for the basic function of storing retrieving data as required by other applications. It can be run either on the same computer or on another across a network.