SQL Introduction

There are several other useful items in this output, one being dbi_LastLogBackupTime
which checks to make sure the log files are backing up as expected. The most common way to alert a DBA to failed SQL Server Agent jobs is to use
email. Sometimes I want a concise look at all the failed jobs for one server
on one screen.

The company’s image might be damaged if they lose customer’s data
or if database-related issues cause disruptions of client-facing applications. Some
bad scenarios include losing clients or facing penalties. https://remotemode.net/become-a-sql-dba-developer/ LDF – LDF contains what ever changes we are performing on database all the change related information will be recorded in LDF file. We require minimum 2 files 1 MF and 1 LDF to create a database.

Chapter 7: ADF Data Flow – 2

No, renaming a database will not change its physical file names. You need to manually perform additional steps to change the database physical file names. Any record deleted from SQL Server is not actually deleted https://remotemode.net/ from its physical data pages but
marked as “To BE DELETED” or “GHOSTED” by changing a bit in the row header. These records will be cleaned up by an
internal process that is called the ghost cleanup process.

Whenever we take log backup it copies the inactive portion and truncates the inactive portions. Before commit in MDF every transaction should written a entry in log file is called WAL. Pages commit in log file and waiting for check point to more mdf, those called dirty pages.

Licensing or Certifications for

To follow the tutorial, you should have some fundamental database concepts. In this module, you will learn how to create and keep baselines, performance metrics, standards, and finally, monitor RAM and disk usage, connections, and cache stats. Yes, we can change the secondary database restore mode from restoring to standby to use it for read-only operations.

• In sql server all the data will be stored in the form of records, these records also called as row data.
• The Problem Details window can be opened by clicking the Details icon next to an entry in the Error List.
• If you like to work with data, have great analytical skills, and have good troubleshooting skills, being a Database Administrator might be a good fit for you.

A table is a collection of related data entries and it consists of columns and rows. There are instances where you don’t place a primary key on a table. For
example, if you load data into a staging area, you might skip a primary key. But
you’ll want to include a primary key for most tables. Companies sometimes use a design pattern of

soft deletes, where a bit or date column indicates when you hide a row from
the end user. I think of these as deletes for people who can’t commit—I
kid.

SQL SERVER STORAGE ARCHITECTURE

We can use either the system dynamic management function sys.dm_io_virtual_file_stats or a
system function fn_virtualfilestats to get this information. We need to pass database and file id details about that
specific database file for which we are looking for IO statistics. I am pulling IO statistics
for the master database log file. At the beginning of your career, you may perform basic database maintenance tasks,
but as you grow professionally you will need to extend your skill set to other than
DBA skills.

If all virtual logs files are filled up the inactive portion will grow further and creates more virtual logs, till we have log space allocated. If it cannot grow further it will throw an error “ Transaction log for database is full and transaction will fail”. In this module, you’ll complete your final course project, which brings together concepts and practices you previously learned in the first four modules. In this three part assignment, you will perform database administration tasks across 3 different databases. You will start by installing and configuring a database, managing users and performing a backup. You will move on to recovery, indexing, optimization and automation of routine tasks.