|
Feature |
Azure SQL |
SQL Server |
|
Hosting |
Azure PaaS. |
On-premises. |
|
Max DB Size |
4TB (in P15). |
Based on SQL Server license. |
|
Licensing |
Not required. |
Requires SQL Server license. |
|
Backup and Restore |
Not Support. |
Support. |
|
Login |
Server Authentication. |
Windows Authentication and Server Authentication . |
|
Azure Cost |
Based on Database Throughput Units* (DTU’s) consumed. |
None, it’s on-premises. |
|
Analysis Services, Replication, Reporting Services, or SQL Server Service Broker |
Not Support. |
Support |
|
Database Mirroring or Failover Clusteringstrong> |
Not Support. |
Support |
|
Switch/Change(use) Database |
No. |
Yes |
|
Access Linked Servers |
No |
Yes |
|
SQL Profiler |
Not support |
Support |
|
|
In SQL Azure an idle connection goes down after 5 minutes and can go down for a lot of other reasons than timeout. You need to think about this especially if you use connection pooling. |
In SQL Server an idle connection almost never goes down. If it does, there is usually a serious error. |
|
Default transaction isolation level |
READ_COMMITTED_SNAPSHOT. |
READ_COMMITTED. |
|
SQL Server Agent |
Not Support . |
Support |
|
|
You cannot write cross-database references in SQL Azure. |
SQL Server you can combine data from databases in the same instance. |