Here are three at three meaningful examples. Window ing functions compute aggregations based on defined partitions. You can also do more with aggregate functions. For instance, imagine the scenario where you had to report the order total for each order, but you also had to show the previous order total LAG and the next order total LEAD. You might have another requirement, which is to show a running total.
All of this can be put into a simple query:. Note that the query uses the keyword ROWS in the framing clause. Since SQL Server is gathering the data at one time, the single query performs faster than having multiple queries trying to gather, re-gather, and calculate the same information. In addition, the data is all on the same row:. When SQL Server debuted, it introduced a granular access model.
Microsoft pushed for the use of the new security model over the built-in database and server roles. However, at the time some server-level functionality keyed in on whether a login was in a role like sysadmin rather than checking to see if the login had the CONTROL permissions. DBAs could carry out this best practice at the database level, but not at the server level. With SQL Server , server level user-defined roles are now possible. However, you need to segment your permissions at the server level; you can create a role, assign the permissions, and then grant membership.
To get around it, DBAs and developers have typically had to write code like this:. Note that each of these statements must have the correct name. Without third-party tools which do this sort of scripting for you, it can be cumbersome, especially in a large deployment. Microsoft added this feature in SQL Server Now, you can simply do this:. If the table exists, SQL Server drops it. There are some techniques to minimise these pains. Then you can point the application to that friendlier name.
This is an example of loose coupling applied to infrastructure. But what if there are already applications configured to point directly to SQLServer? Again, DNS can help. I have used this trick a lot in migrations, but it does require all the databases to move en masse to a single replacement server and the old server to be completely offline to work. All supported versions of SQL Server allow you to run a database in this compatibility mode.
Therefore, you should be able to deploy to SQL Server or , if it is out by the time you are reading this. Is there functionality that will break in the new version? Can you move the database to Azure? Trying to answer these questions can be a daunting task. Data Migration Assistant is extremely easy to use. Here, the target specified is SQL Server and DMA is being instructed to not only look at compatibility issues but also to examine any new features that might be helpful.
DMA will churn away and return its assessment:. Now AdventureWorks is a tiny, relatively simple database. For your databases, especially large and complex ones, expect DMA to churn for a while and to have more recommendations and warnings.
You may be in a situation where you cannot make a move by the deadline. What are your options? There are three:. The first option, especially if you have to stay with on-premises SQL Servers, is to join the Extended Support Update program mentioned earlier. This is a pricy option, but it is the only way to maintain support for on-premises SQL Servers. Keep in mind, though, that in order to enroll in this program, Microsoft may very well ask for a migration plan on how and when you will move to supported versions of SQL Server.
If you have the option of moving to a VM in Azure, then you will have additional coverage for three more years, as Microsoft indicated in a post on the Microsoft Azure blog.
Microsoft has promised extended security updates at no extra cost if you are running on an Azure VM. In addition, the blog includes a reminder that a managed instance in Azure is another option for customers.
Again, you have to have the capability of moving to Azure. However, if you already in Azure or if you have been preparing to establish a presence, then an Azure VM may be a solution if you cannot migrate off SQL Server or R2.
Your organisation may reason that Microsoft SQL Server has been relatively secure with only a handful of patches. There are a couple of issues, however. The second issue is around compliance. Some regulations, industry standards, and laws require systems to be running on supported, patched software. If your organisation is required to comply in such a manner, then going without support means the organisation is knowingly violating compliance and risks being caught.
This is not just an immediate issue. After all, many regulations and laws can result in penalties and fines well after the period of non-compliance. An organisation should only choose to go without support after a proper risk assessment. I know of cases where organisations decided to continue on NT 4 domains because they could not migrate to Active Directory.
They could not find a proper replacement for that essential software and the business risk was more significant not to have the software or its functionality than running unsupported operating systems or software. However, those were informed decisions made after considering which was the greater risk. Microsoft has provided tools and guidance for upgrading.
One example is the Data Migration Assistant. Microsoft has also provided additional documented guidance in SQL Docs to cover your migration scenario. The more costly option is to enter the Extended Support Upgrade program. The other path is to deploy to SQL Server instances in Microsoft Azure, as these will remain under support until SQL Provision lets you create, manage and mask copies of your SQL Server databases using a fraction of storage — helping you remain compliant while working with realistic test data.
Try it free. Upgrading lets you take advantage of the latest product innovations, and ensures uninterrupted support from Microsoft. SQL Server end of support options. SQL Server R2 documentation. SQL Server documentation. The Azure Migration and Modernization Center has a full range of tools available to help you:. Microsoft also works with many partners who are available to help you at every step of the journey. The modern work landscape is changing.
There is a need for massive data growth, powerful insights into unstructured data, and analytics that drive digital transformation. End of support provides a chance for you to not only revisit your customers and ensure they are modernized, but to move them to the cloud and increase your monthly profits.
Prepare for end of support by reviewing our newest resources and watching on-demand webinars created specifically to guide you through these events. Get to market quickly with the latest end of support assets! Download today. Use Windows Server end of life as an opportunity to re-visit your current customers and encourage them to adopt the latest technologies.
With the impending end of support deadlines, now is the time to upgrade, modernize, and transform your customers to current versions of SQL Server, Windows Server, or Azure services for more security, performance and innovation. Watch it here. End of support, like any lifecycle milestone, offers you a change to reassess and set up your customers, and yourself, for the future. Get started today. Prepare today!
In the meantime, you can find out how to go to market faster with an indirect provider.
0コメント