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Five Typical Mistakes For Constructing and Maintaining SQL Server Databases
Constructing and maintaining a SQL server database environment is like trying to hit a moving target. There are many parameters to consider for design, support, and troubleshooting. Making a mistake in those areas or overlooking certain details and tasks only make the job harder.
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These are 5 typical mistakes that occur in the creation and maintenance of a SQL server database environment. There are definitely more mistakes that are made but you should be mindful of these.
1. No Plans To Backup
Failure to regularly backup your databases is an invitation for disaster. Backup planning should involve regular backups, ability to gather and recover backed up data, and use of locations other than database server for storage purposes. Make a point to perform backups early and often. You will never want to come across a scenario where you don't have the backed up data.
2. Utilization of Ad Hoc Queries
Stored procedures on the application level should be the only way a user can access the database. Permissions like INSERT, UPDATE, SELECT, and DELETE are usable when users are writing their on code with an Ad Hoc query. Stored procedures enable only EXECUTE permissions preserving data integrity and providing improved performance through compiling and caching. Proper SQL optimization begins with removing most or all ad hoc queries.
3. Not Testing Correctly
Just like having a bad backup plan, if you put code in production before it is tested you are putting yourself in a bad spot. It is certainly a mistake not to provide for beta and sustained testing. Optimum pre-production testing must mimic production environments as closely as possible. Databases that are used for testing are typically smaller and will not always scale well to a full-fledged production environment. Doing the correct testing now will help prevent fixes needed in the future.
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4. Insufficient Monitoring
You should not assume that your database is already optimized and has no issues with performance. Continued SQL optimization requires regular performance monitoring to ensure a quality end user experience. Not performing the proper monitoring opens you up to slowed performance due to applications and queries using up system resources. SQL server queries and hardware environments must be monitored and optimized to ensure proper performance. SQL monitors give DBAs a historical view of trend data to help them create a plan to tune the database and improve performance.
5. Insufficient Change Management Processes
Changes to a stable production environment should not be undertaken lightly. It requires the appropriate testing, planning, and implementation processes. Using a change management process will offer better structure when making changes. Documenting how, why and when changes need to be made allows for fast reversions in instances where a change to the database didn't go as planned. Thorough pre-production tests must also be a piece in the change management puzzle. Don't forget to document everything that you do.