MS SQL Server Course And Certification

What is MS SQL Server?

MS SQL Server is a relational database management system (RDBMS) that was developed and is managed by Microsoft. This product is developed for the basic function of storing and retrieving data as required by other software applications. It can be either run on the same computer or on another computer across a network.

MS SQL Server buffers pages in the computer RAM to minimize disk input and output. Any 8-kilobyte page can be buffered in the ram, and the group of all the pages that are currently buffered is referred to as the buffer cache. The amount of memory that is made available to the SQL Server decides how many pages will be cached in the memory. The buffer cache is handled and managed by the Buffer Manager. Either writing to or reading from any page copies the data to the buffer cache. Subsequent reads or writes are forwarded to the in-memory copy, rather than the version that is on-disc. The page is then updated on the storage medium by the Buffer Manager only if the in-memory cache has not been referenced for a while. While writing data on the pages back to disc, asynchronous input and output are used whereby the I/O operation is carried out in a background thread so that other operations do not have to wait for the input-output operation to be completed.

MS SQL Server allows several clients to make use of the same database concurrently. As such, it needs to manage and control the concurrent access to the shared data, to make sure of the data integrity when multiple clients update the same data, or when clients attempt to read the data that is in the process of being modified by another client. MS SQL Server presents developers with two ways of concurrency control which are optimistic concurrency and pessimistic concurrency. When pessimistic concurrency control is being used, SQL Server manages and controls the concurrent access by using locks. Locks can be either shared or used exclusively. Exclusive lock presents the users with exclusive access to the data, no other user can have access to the data as long as the lock is on. Shared locks are made used of when some data is being read multiple users can read from data that is locked with a shared lock but not locked with an exclusive lock. The data that is held with an exclusive lock would have to wait for all the shared locks to be released.

Features of MS SQL Server

Below are some of the features of MS SQL Server

1. Highest performing data warehouses: MS SQL Server lets you get support for small data marts to large scale enterprise data warehouses while reducing the storage needs with enhanced data compression capabilities.

2. Security and compliance: MS SQL Server helps to secure data for workloads that are mission-critical with a layer of protection security approach, by always adding Always Encrypted technology together with row-level security, transparent data encryption (TDE), dynamic data masking, and robust auditing.

3. In-database advanced analytics: MS SQL Server lets you build intelligent applications with SQL Server Machine Learning Services by using Python and R.

Benefits of MS SQL Server

There are lots of benefits of MS SQL Server and some of them are:

1. The installation of MS SQL Server is streamlined.

2. The security features of MS SQL Server are better.

3. MS SQL Server has a very enhanced performance.

4. The cost of ownership of MS SQL Server is lower.

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