Christa  Stehr

Christa Stehr

1593487560

Installing phpMyAdmin for Setting Up Database on a Remote Server | PHP Tutorial #72

Installing phpMyAdmin for Setting Up Database on a Remote Server | PHP Tutorial #72

#php

What is GEEK

Buddha Community

Installing phpMyAdmin for Setting Up Database on a Remote Server | PHP Tutorial #72
Ruth  Nabimanya

Ruth Nabimanya

1620633584

System Databases in SQL Server

Introduction

In SSMS, we many of may noticed System Databases under the Database Folder. But how many of us knows its purpose?. In this article lets discuss about the System Databases in SQL Server.

System Database

Fig. 1 System Databases

There are five system databases, these databases are created while installing SQL Server.

  • Master
  • Model
  • MSDB
  • Tempdb
  • Resource
Master
  • This database contains all the System level Information in SQL Server. The Information in form of Meta data.
  • Because of this master database, we are able to access the SQL Server (On premise SQL Server)
Model
  • This database is used as a template for new databases.
  • Whenever a new database is created, initially a copy of model database is what created as new database.
MSDB
  • This database is where a service called SQL Server Agent stores its data.
  • SQL server Agent is in charge of automation, which includes entities such as jobs, schedules, and alerts.
TempDB
  • The Tempdb is where SQL Server stores temporary data such as work tables, sort space, row versioning information and etc.
  • User can create their own version of temporary tables and those are stored in Tempdb.
  • But this database is destroyed and recreated every time when we restart the instance of SQL Server.
Resource
  • The resource database is a hidden, read only database that holds the definitions of all system objects.
  • When we query system object in a database, they appear to reside in the sys schema of the local database, but in actually their definitions reside in the resource db.

#sql server #master system database #model system database #msdb system database #sql server system databases #ssms #system database #system databases in sql server #tempdb system database

Loma  Baumbach

Loma Baumbach

1598296680

SQL Server System Databases - Basic Concepts

Introduction

The SQL Server design implies a one-to-many mapping between the database engine (instance) and the databases hosted on the instance. It means that you can deploy several databases on one instance of the SQL server. According to the Microsoft documentation, you can have up to 32767 databases on a single instance of SQL Server. Of course, there will be limitations, like the resources on the server, managing concurrency on TempDB, network traffic, etc.

Databases deployed on a SQL Server instance can either be System Databases or User Databases. System Databases come installed with the instance. In this article, we will discuss the purpose of each System database. Also, we’ll clarify what you need to care for when managing system databases on SQL Server.

Overview of System Databases

System databases are a part of many processes taking place when you install an instance of SQL Server. By default, these databases are created in the following paths:

%programfiles%\Microsoft SQL Server\MSSQL15.MSSQLSERVER\MSSQL\DATA

and

%programfiles%\Microsoft SQL Server\MSSQL15.MSSQLSERVER\MSSQL\Log

The path can be different. During the installation of SQL Server, you can specify the location of the system database files.

To list all the system databases in an instance, you can invoke the code in Listing 1. Listing 2 can be used to determine the location of the datafiles associated with the system databases. Note that in both scripts, we use a filter returning databases with database_id of 5 or higher than 5.

The essential “visible” system databases have database_ids 1,2,3,4 – they refer to master, tempdb, model, and msdb, respectively. There is also an “invisible” database called the resource databases and other system databases created when you enable features like replication.

-- Listing 1: System Databases
select 
name
,database_id
,create_date
,state_desc
,recovery_model_desc
,log_reuse_wait_desc
,physical_database_name
,is_db_chaining_on
,is_broker_enabled
,is_mixed_page_allocation_on
from sys.databases 
where database_id<5;

-- Listing 2: System Database Files
select 
name
,database_id
,DB_NAME(database_id)
,name
,physical_name
,type_desc
from sys.master_files 
where database_id<5;

Figure 1: System Databases

The master Database

The master database is the first database open on the start of SQL Server, containing the following data:

  • The records of the structure/configuration of the instance and all other databases.
  • The most dynamic management views that are necessary for monitoring the instance.

Thus, it has the information necessary for opening all other databases. That’s why it has to be first to open. The question is how to do it.

The SQL Server startup parameters contain two entries, which define the locations of the master database data and log files. The default startup parameters include only three lines – the third one is the error log file location. When SQL Server starts up, it must be able to write to that error log file.

The master database opens first. The information stored in the master database, including the configurations defined using sp_configure, applies to open other databases and complete the instance startup process.

Figure 2: SQL Server Configuration Manager

Figure 3: SQL Server Startup Parameters

There are several ways to learn about useful SQL Server system objects, like Dynamic Management Views and Functions.

For instance, expand the views or programmability nodes for the master database on object explorer. There, review these objects’ names and get more details from Books Online.

You can also migrate logins from one instance to another. For that, restore a backup of the master database to the destination instance. We’ll describe the specific technique in a separate article.

#sql server #sql server #sql server instance #sql server system databases #tutorial #database

I am Developer

1599190536

How to Store Form Data in Database using PHP -2020

In this php code to insert form data into mysql database. I will show you simple way of how to create an html form that stores data in a mysql database using php.

#How to store form data in database using php

  1. Create html form
  2. Create mysql database connection file
  3. Create php file to insert form data into mysql database

https://www.tutsmake.com/php-code-insert-data-into-mysql-database-from-form/

#php code for inserting data into database from form #how to insert data in mysql using php form #how to insert data into database in php using xampp #how to save data from html form to a database using php #how to save data in database on button click in php

Christa  Stehr

Christa Stehr

1593487560

Installing phpMyAdmin for Setting Up Database on a Remote Server | PHP Tutorial #72

Installing phpMyAdmin for Setting Up Database on a Remote Server | PHP Tutorial #72

#php

I am Developer

1598427973

Login Page in PHP with Database Source Code

complete login system php mysql. Here, i will show you how to build complete login system in php mysql using session.

And as well as how to create login page, user profile page in php with database and validation.

https://www.tutsmake.com/login-system-in-php-mysql-source-code-with-validation/

#login system php source code #simple login page in php with database source code #login page in php with database and validation #simple login form in php with mysql database #php login session