Learningcomputer.com SQL Server 2008 – Backup and Restore Database

Why Backup? Hard Disk failure Motherboard failure Power outage or surge Accidental deletion of data Malicious deletion of data Personally for me I do it to Keep my Job!

Terminology Backup means to make a copy of the database either full or partial Restore means to replace your current database with a backup Disk is referred to a storage medium like physical hard drive Device can refer either to a Disk or Tape Backup types are Full, Differential, Log and Filegroup

Types of Database Backups Full Database Backup Transaction Log Backup – A sequence of log backups provides for a continuous chain of transaction information Differential Database Backup – backup data since last backup – faster in case of many transactions Filegroup Backup – lets you backup to different filegroups and is very fast

Full Database Backup This re-creates the database as it was when the backup operation completed There is no way to recover any modifications made to the database after the most recent database backup Use this method when you need to implement simple maintenance procedures Use this for a read-only database

Differential Database Backup A differential database backup records only those data changes made to the database after the last full database backup Unlike the log backup, it cannot be restored to a particular point in time A differential database backup is smaller and takes less time to complete than a full database backup

Transaction Logs Backup Allows you to re-create the database without a full db backup This saves time when restoring the db Transaction log can be cleaned after a log backup Lets you restore to a certain point in time Database changes are frequent

Filegroup Backup This lets you backup database to filegroups This helps you backup in a short time This method is typically used to backup VLDB Also need to backup transaction log

Backing Up database in SQL Server Three options SQL Server Management Studio Transact SQL Maintenance Plan Demo: We will backup AdventureWorks2008 to our local disk We will do a Full database backup, change information, do a differential backup, change more information, do one log backup, make final changes and then do a last log backup