![]() This is very useful if the database is big and we want to restore some few objects or some specific rows. However, you can restore data and objects from the snapshot. If the source database is corrupted, the Snapshot will not be able to restore the database because there is a dependency between them. The Snapshots cannot replace the traditional backups, because it depends on the source database. ConclusionĪs you can see, Snapshots is a simple way to create copies of your information to partially restore the information. Specify a Name and select the T-SQL Type (which is the first option by default):Īs you can see, it is very simple to automate tasks and work with Snapshot Databases. Specify a Name and optionally a description of the job: To create snapshots of the database, it is necessary to schedule a Job each month: The code creates a Database Snapshot with the current number of the month. Imagine that an evil person drops the dbo.uspGetBillOfMaterials stored procedure in the Database If by mistake (or any other circumstance) a user drops a stored procedure, a view or a table or any object, you can recover the database object using the snapshot. The size on this of the source database is equal to 205 MB. The Adventureworks2012 database has the same size and size in disk as shown in the picture 5: The file size of the Snapshot Database is just 3.31 MB. This reduces a little bit the database performance because of the synchronization. This is because each time that the original database changes, the snapshot grows. The database snapshots files have a similar size that a normal database, but a smaller size on disk. Set restore options: In the Options section, select. Click OK to return to the main restore screen. In the General section, select Device as the source and click on the button to choose the AdventureWorks2019.bak backup file. You can also use the T-SQL to try to update tables in the database snapshot with the same results: Right-click on the Databases folder and select Restore Database. If you try to update or delete the data you will not be able to do it. If everything is OK, you will be able to see the snapshot created in the SSMS: By default, it is better to specify the extension of the snapshot datafile as.We use the word AS SNAPSHOT OF DATABASE_NAME to specify the name of the database that requires a snapshot.generate an SQL Script as shown in the screenshot below.As you can see, the syntax is similar to a normal database creation except for two things: Once you have your ER diagram ready, you can generate an interactive HTML report, export the diagram to PDF or e.g. Use the display mode and/or line mode that best suits your needs. ![]() Step 5: Change the display mode and line mode You can add notes, images and other elements to the ER diagram. Rearrange items on the main diagram or on any sub-diagram. ![]() Step 4: Change the layout and rearrange items To split the diagram, right click the diagram area and choose Add diagrams by Schemas. In Luna Modeler you can easily split the main diagram and automatically create a sub-diagram for each database schema. Step 3: Create sub-diagramsįor more convenient work with the ER diagram, it is a good idea to divide it into smaller parts. Go to the Connections page and click Connect and Load Existing Database Structure to reverse engineer the database and create the ER diagram. Step 2: Reverse engineer the database structure Specify the connection name and other connection properties. On page Connections, click the Create New Connection button. Step 1: Run Luna Modeler and create a new SQL Server connection This section assumes that you have the AdventureWorks database installed. How to create the ER diagram in Luna Modeler The following screenshot shows the ER diagram for the Person schema. ![]() In this article you will learn how to easily create an ER diagram of the AdventureWorks sample database. Installation instructions are described on the download pages. You can download the sample from Microsoft’s website or Github. It is often used in learning and training environments so that students may learn and put their SQL queries and data manipulation skills to practice. Microsoft has made available an example database called AdventureWorks that is intended for testing and demonstrating different Microsoft SQL Server functionalities. What is the AdventureWorks sample database?
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