In this course you can learn the fundamental basics of data management with SQL and MySQL. Learn everything that you will need to make queries with the most popular data manipulating programming language SQL.
This course is about SQL commands in the main. You will learn the basics of queries. Let’s take a look at what you are going to learn in this course:
Section 1 — Setting up The Environment:
setting up the environment
installing MySQL server on Windows and MacOS
Section 2 — Database Theory
what are databases?
what are database management systems (DBMSs)?
what are database languages?
the data structures (B-trees) behind databases
procedural and non-procedural programming languages
Section 3 — Creating and Manipulating Tables
basic data types (integers, floating point numbers and characters)
enums and dates
how to create databases?
how to insert and remove items?
how to update existing items or database tables?
Section 4 — Basic SQL
basic SQL and MySQL commands
select, where and wildcards
ORDER BY and GROUP BY commands
Section 5 — Multiple Tables
joining multiple database tables
left and right join
Section 6 — Database Normalization
what is database normalisation?
first normal form (NF1)
second normal form (NF2)
third normal form (NF3)
Section 7 — Subqueries:
advanced SQL and MySQL
what are subqueries?
correlated and non-correlated subqueries
Section 8 — Transactions
what is database locking?
the ACID principles?
COMMIT, ROLLBACK and SAVEPOINT
Section 9 — Views
what are views and why are they crucial?
Section 10 — Indexes and Constraints
what are indexes and why to use them?
primary keys and foreign keys revisited
what are constraints?
Section 11 — Data Structures Behind Databases
what are pages?
the basic concept of paging in operating systems
external memory and internal memory
B tree data structure
B+ tree data structure
Section 12 — Stored Procedures
what are stored procedures?
SQL stands for Structured Query Language. SQL is a scripting language expected to store, control, and inquiry information put away in social databases. The main manifestation of SQL showed up in 1974, when a gathering in IBM built up the principal model of a social database. The primary business social database was discharged by Relational Software later turning out to be Oracle.
Models for SQL exist. In any case, the SQL that can be utilized on every last one of the major RDBMS today is in various flavors. This is because of two reasons:
1. The SQL order standard is genuinely intricate, and it isn’t handy to actualize the whole standard.
2. Every database seller needs an approach to separate its item from others.
Right now, contrasts are noted where fitting.
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In this course, we’ll be looking at database management basics and SQL using the MySQL RDBMS.
⭐️ Contents ⭐
⌨️ (0:00) Introduction
⌨️ (2:36) What is a Database?
⌨️ (23:10) Tables & Keys
⌨️ (43:31) SQL Basics
⌨️ (52:26) MySQL Windows Installation
⌨️ (1:01:59) MySQL Mac Installation
⌨️ (1:15:49) Creating Tables
⌨️ (1:31:05) Inserting Data
⌨️ (1:38:17) Constraints
⌨️ (1:48:11) Update & Delete
⌨️ (1:56:11) Basic Queries
⌨️ (2:08:37) Company Database Intro
⌨️ (2:14:05) Creating Company Database
⌨️ (2:30:27 ) More Basic Queries
⌨️ (2:26:24) Functions
⌨️ (2:45:13) Wildcards
⌨️ (2:53:53) Union
⌨️ (3:01:36) Joins
⌨️ (3:11:49) Nested Queries
⌨️ (3:21:52) On Delete
⌨️ (3:30:05) Triggers
⌨️ (3:42:12) ER Diagrams Intro
⌨️ (3:55:53) Designing an ER Diagram
⌨️ (4:08:34) Converting ER Diagrams to Schemas
📺 The video in this post was made by freeCodeCamp.org
The origin of the article: https://www.youtube.com/watch?v=HXV3zeQKqGY&list=PLWKjhJtqVAblfum5WiQblKPwIbqYXkDoC&index=8
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MySQL is the all-time number one open source database in the world, and a staple in RDBMS space. DigitalOcean is quickly building its reputation as the developers cloud by providing an affordable, flexible and easy to use cloud platform for developers to work with. MySQL on DigitalOcean is a natural fit, but what’s the best way to deploy your cloud database? In this post, we are going to compare the top two providers, DigitalOcean Managed Databases for MySQL vs. ScaleGrid MySQL hosting on DigitalOcean.
At a glance – TLDR
ScaleGrid Blog - At a glance overview - 1st pointCompare Throughput
ScaleGrid averages almost 40% higher throughput over DigitalOcean for MySQL, with up to 46% higher throughput in write-intensive workloads. Read now
ScaleGrid Blog - At a glance overview - 2nd pointCompare Latency
On average, ScaleGrid achieves almost 30% lower latency over DigitalOcean for the same deployment configurations. Read now
ScaleGrid Blog - At a glance overview - 3rd pointCompare Pricing
ScaleGrid provides 30% more storage on average vs. DigitalOcean for MySQL at the same affordable price. Read now
MySQL DigitalOcean Performance Benchmark
In this benchmark, we compare equivalent plan sizes between ScaleGrid MySQL on DigitalOcean and DigitalOcean Managed Databases for MySQL. We are going to use a common, popular plan size using the below configurations for this performance benchmark:
ScaleGridDigitalOceanInstance TypeMedium: 4 vCPUsMedium: 4 vCPUsMySQL Version126.96.36.199.20RAM8GB8GBSSD140GB115GBDeployment TypeStandaloneStandaloneRegionSF03SF03SupportIncludedBusiness-level support included with account sizes over $500/monthMonthly Price$120$120
As you can see above, ScaleGrid and DigitalOcean offer the same plan configurations across this plan size, apart from SSD where ScaleGrid provides over 20% more storage for the same price.
To ensure the most accurate results in our performance tests, we run the benchmark four times for each comparison to find the average performance across throughput and latency over read-intensive workloads, balanced workloads, and write-intensive workloads.
In this benchmark, we measure MySQL throughput in terms of queries per second (QPS) to measure our query efficiency. To quickly summarize the results, we display read-intensive, write-intensive and balanced workload averages below for 150 threads for ScaleGrid vs. DigitalOcean MySQL:
ScaleGrid MySQL vs DigitalOcean Managed Databases - Throughput Performance Graph
For the common 150 thread comparison, ScaleGrid averages almost 40% higher throughput over DigitalOcean for MySQL, with up to 46% higher throughput in write-intensive workloads.
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Hello guys, if you want to learn Microsoft SQL and T-SQL and looking for free online courses then you have come to the right place. Earlier, I have shared the best SQL Server courses and Database courses and in this article, I am going to share the best free T-SQL courses for beginners.
The Microsoft SQL Server is not just one of the popular database solutions but also one of the most complicated software offerings from Microsoft. It requires you to have a foundation in networks, databases, and programming.
This wide range of skills is often challenging to obtain without rigorous learning and years of hands-on experience. Since it’s difficult to learn and master the demand for expert SQL Server DBAs and Programmers is always high, particularly in banking sectors.
I know many of my friends in London and all around the world become SQL Server DBAs after starting as a programmer just to work on those big banks and earn very high salaries.
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Database Administration consists of everything essential for managing a database. This makes it
accessible as per your need. The DBA is the person who maintains, backs up and ensures the data
generation and consumption. You can access them by today's organizations through their IT systems.
The DBA plays a vital role in many of today's IT agencies, and by extension, their organizations as a
Consider, for example of a commercial bank. The DBA is the person who ensures that the bank teller
has fast, simple access to your records. Therefore you can access your bank balance and transaction
history easily. For this case, the DBA is an application database administrator and a general SQL DBA
position. This is responsible for most aspects of the databases of the organization. It isn’t the only form
of SQL DBA though. In this article let us go through duties and specializations of SQL DBA training
Duties of SQL DBA administrator
The duties of a database administrator can include:
Installing and updating the database server and or application software.
Planning and allocating the physical requirements of the database system. The activities include memory, storage space, network requirements, and so on. Modifying the database configuration using input provided by application developers.
Creating user profiles, and maintaining device protection by conscientious user permissions allocation.
Ensure compliance with the vendor license agreement for the database. This includes a number of installations, and takes care of licensing renewals.
Create a database backup and recovery strategy. Then test the backups regularly to ensure usability.
Monitoring technological support for all database systems and software related to these.
Generates reports by querying from the database as required. These reports can take the form of pre-formatted reports using the application frontend. Besides includes database administrator’s custom-made ad hoc reports.
Track and improve the performance of the database. You can either use manual or automated methods. This may be the most critical duties of a SQL DBA.
Migration of database instances into new hardware and software models. This is from premise to cloud-based applications, and vice versa.
Now that you have read about the duties let us go through different specializations a SQL DBA can acquire.
SQL Database administrator specializations
The term ‘doctor’ may refer to a wide range of specializations. Similarly the position of database administrator often includes a wide range of sub-specializations. The SQL DBA mentioned is the most popular one. It is the one who works for a company in-house or on contract. This helps to keep its internal databases chugging along optimally. The various SQL DBA jobs specializations are as follows.
There are also database managers who mainly build and construct databases. They work as part of a team, often in a software development company with more speciality. The database would be part of a larger framework for some particular business needs. In the commercial bank example earlier, the bank most likely buys or leases the software.
This is from an information communication and technology (ICT) firm. The firm specializes in banking software to operate its banking operations. Backed by a database, which is the backend storage for all the data, develop this banking software. You may build this by a team of professional SQL DBAs (more aptly called ‘database designers’). They work with business analysts and others who are familiar with banking operations. This is to develop functions and modules for the different applications. This is to ensure that all bank functions you create reflect in the database structure.
Quality SQL DBA or Tuning SQL DBA:
It is another type of database administrator. You may use this administrator in the optimization and enhancement of the performance. Databases parts of complex software. Simply put, the internal structure of a database and compose of data contained in tables. Using indexes which read like the table of contents of a book can then optimize data access. SQL DBAs help make sure to make a design for the database to take advantage of the physical or virtual hardware.
This means that you need to be able to spread data between multiple disks. Therefore it allows the database to allow better use of the memory or RAM. Besides it manages remote database network traffic. In ‘distributed setups,’ some databases split from multiple servers. Some databases may get so complex. Therefore they require a SQL DBA that focuses solely on improving performance. However, a non-specialist SQL DBA is commonly enough for smaller, single-company databases. for more SQL server dba online course
Application SQL DBA
A third category of database administrator is Application SQL DBA. Specifically, this function focuses on incorporating databases into the applications using them. Browsing most databases needs typically knowledge of a particular type of query language. The Organized Query Language, or SQL, is the most popular. Most users won’t learn how to use and navigate SQL.
Instead, they’ll use a front-end program to perform their required tasks. In a commercial bank, this application is the banking program itself . It is the SQL DBA job to ensure proper contact between the database and the programmer. SQL DBA uses it, and you may share reliable results between the two. For example, the database returns the correct amount and not.
Path to become a SQL DBA
There are two key paths to becoming a database administrator.
Focusing on becoming a SQL DBA from the start of an IT career or
Starting in a general ICT field, such as support or growth from the helpdesk, and slowly becoming more skilled in database management.
Either way, being a professional database administrator won’t occur overnight. You first need to learn other skills that are also important in most ICT careers.
SQL DBA Skills:
The important skills for a SQL DBA are as follows.
Excellent troubleshooting skills
When faced with a question, particularly one you haven’t seen before, the ability to think through the possible causes and then remove or logically follow them to the end is absolute. A successful SQL DBA is one who can see a mistake, and then quickly find potential causes and create possible solutions.
Logical thinking, common sense and above-average memory:
It is also important to have the natural ability to think methodically using an elimination-based approach coupled with a good memory. This includes the ability to remember technical information about various systems and technologies that are important to your configuration, such as how to increase the size of a table in your SQL Server database, how to connect a new disk to your Linux server and how to remove a user in your PostgreSQL database. Similarly, bearing in mind some basic details about your particular environment (Do you work in a LAN or WAN? What are the passwords of the database administrators? How many users do you have? When is your next audit of the database? Where are your backups stored?) is essential.
Curiosity and a deep desire to learn:
Curiosity and ambition should help ensure that your career as a database administrator doesn’t stagnate. The nature of IT is constantly changing — only the desire and appetite to keep learning new things can keep you from going backwards.
It is a good idea to have one or more commercial database systems approved. Most organizations should concentrate on recruiting people with qualifications and SQL DBA training in the applications that they use similar database. You can always go for SQL server dba training for getting expertise in the topic.
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