The MS SQL Server is considered one of the most versatile database applications in vogue today and it packs in quite a punch to ease your work. Now while you are creating queries to run on the SQL Server database, you can include functions in them. While most database professionals from a programming background are well versed with functions, others may be hesitant to use them. Essentially functions are pieces of reusable code that can be called in whenever necessary to execute a series of actions. Let’s explore both the advantages and disadvantages of using functions in SQL queries.
Functions make sense for queries that are not frequently made
In many cases functions in queries can be effectively used to carry out intricate steps while allowing the basic query to remain simple. In other words a query to update a specific table may include an associated function to verify data which can remain same, even if you change the target table for the query at a later date. Ideally you should use functions only in queries that are not frequently executed.
Avoid using functions in queries which showcase multiple result sets
In case you are looking to use functions in queries like Select which can at time give you results with multiple result sets, it can lead to serious performance issues. The function can get repeatedly called and it can slow down the response time by a significant degree, and can hamper the overall performance. So simply steer clear of using functions in queries such as Where or Select unless it is absolutely essential.
Reducing Data Loss issues while running a SQL Server instance
Most database administrators would agree that data loss scenarios can crop up while using even a top of the line database solution like SQL Server. However it is entirely in your hands about the follow up steps that you take to retrieve the data. For instance is some records got deleted, you can choose to run a powerful sql recovery tool like the sophisticated DataNumen SQL Recovery and bring back the lost data in quick time. Moreover this versatile tool also comes handy when you encounter a database crash and your entire repository is at risk. Equipped with a potent algorithm to bring back records and other data structures stored in the SQL database, this versatile application is ideally suited for negotiating sparse columns. From getting back every possible structure stored in the database, from queries to views and even triggers, the application is also successful in retrieving data from solid state devices and from botched up virtual drives too. Even if you have to perform a batch recovery of MDF files, the completion time notched up by the tool would be far less than its competitors. Further it also gives assuredly the highest rate of data recovery against its peers under every possible scenario.
Alan Chen is President & Chairman of DataNumen, Inc., which is the world leader in data recovery technologies, including access recovery and sql recovery software products. For more information visit https://www.datanumen.com/