SQL Server Recovery Model Types

SQL Server has 3 recovery model types which control types of backups so let’s discuss in more details all recovery types

when you do these operation sequential

right click any database—> properties –> select Pages –> options

you will see the dialog bellow

as you see in fig above you have 3 types

the relationship between backup types(Rows Headers) and Recovery Models(Columns Header) are

	Full	Bulk-logged	Simple
Full Backup	Yes	Yes	Yes
Differential Backup	Yes	Yes	Yes
Transaction Backup	Yes	Yes	No

it’s very clear that you can’t make trasaction log backup in simple mode.

so what is the Differential between Full mode and Bulk-Logged mode?

Full mode log any transaction in Transaction log file but Bulk-logged can’t log huge transaction to log file like bulk insert or create index in huge tables

you can use Bulk logged for more performance to insert bulk data to database because in this mode you will not log in  transaction log.

you can use Full mode to log any small things to transaction log file to feel safe when to return to end point of disaster

SQL Server Major Backup Types

we have many types of backups but in this article i just discuses 3 types of backups

1. Full Backup:- Backup all data and database objects
2. Differential Backup:- Backup all data and database objects from last full backup
3. Transaction Log Backup:- Backup all transaction from Transaction log file from last official backup official backup can be(Full backup or differential backup or transaction log backup)

let’s discuss fig bellow

F1 is full backup from database 

T1 is Transaction Log backup with difference from F1

D1 is differential backup with difference from F1

T2 is Transaction Log backup with difference from D2

D2 is differential backup with difference from F1

T3 is Transaction Log backup with difference from D2

D3 is differential backup with difference from F1

T4 is Transaction Log backup with difference from D3

D4 is differential backup with difference from F1

T5 is Transaction Log backup with difference from D4

D5 is differential backup with difference from F1