When you have a multi-tenant database, almost every table will have a tenant ID of some type, and these columns will be involved in almost every join operation. When you're designing a multi-tenant database, you generally have three options: This app will be used by 1000-5000 customers. If you put everyone in the same database, you're eventually going to hit a wall on your current hardware and then you're either going to move everyone to bigger hardware anyway. Keeping each tenant in a separate database makes it very easy to move a highly-demanding tenant to their own server, place their data/log files on faster I/O, etc. Right now, I use single field Primary Key which is Id (Guid). The Overflow #43: Simulated keyboards. Shared database, one schema per tenant. There are many important advantages to isolating a tenant in a database. It's not hard to imagine that these databases simply perform worse. 2. Browse other questions tagged sql-server sql-server-2008 database-design multi-tenant or ask your own question. So those are some of the Tips & Tricks you can use in order to be successful building Multi-Tenant Databases in Windows Azure SQL Databases. But stepping back, you should plan to have multiple federated databases holding your tenant data. Separate Database. Ayende@Rahien blog Multi Tenancy - The Physical Data Model I hope that helps and would love to have your thoughts about it. All the tables will have TenantId (Guid / UNIQUEIDENTIFIER) field. Posted: August 11, 2012. For discussion, they're usually broken into three categories. SQL Server Central Mixing tables from different databases/applications into one database. Shared database, shared schema. Should I use a single or multiple database setup for a multi-client application? database-design - single - sql server multi tenant schema . I'm building a multi-tenant app (single database, single schema) using ASP Web API, Entity Framework, and SQL Server/Azure database. (7) Another point to consider is that you may have a legal obligation to keep one companies' data separate from anothers'. For Architecting a Database You can Opt for any One of the Following Three Approaches: 1. CloudExpo SaaS - Multi-Tenant Database Design Options. Since each customer will only be granted access to its own schema, it’s very easy to achieve customer isolation. Shared Database Separate Schema. One database per tenant. Shared Database Shared Schema. – Daniel Hutmacher Mar 27 '17 at 18:50 Yes, it make sense to have the TenantId in every table to avoid the unnecessary joins too. It fully depends on your requirement as which approach to choose but if you want a truly multi-tenant application I would suggest the 3 rd approach i.e. Note that I'm not talking about single vs multi-database on a single SQL Server. You can still go with a multi-tenant database design, but in the end state you will have a mix of multi-tenant and single-tenant databases. Featured on Meta Responding to the … And with a Tenant_ID column in every table, you'll also be able to apply row-level security if you're on SQL Server 2016 or the latest Azure SQL Database. If each tenant does not need physical separation of data and you don't plan on making tenant specific schema changes in the database then I would think a multi-tenant three database design … There are several approaches to multi-tenant databases. MSDN blogs Moving to Multi-Tenant Database Model Made Easy with SQL Azure Federations. Therefore, the tenant identifier is the database schema itself. Tenant data is isolated. Ask SQL Server Central One database or multiple? 3. The Overflow Blog Improve database performance with connection pooling. 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