Databases News, Latest Updates and Recent Announcements on Techminis

A naukri.com initiative

New

Home

Databases

Hackernoon

131

Image Credit: Hackernoon

Deno vs Oracle: Who Really Owns JavaScript?

Deno, a modern runtime for JavaScript and TypeScript, is in a legal battle against Oracle over the trademark for the name “Javascript”.
The lawsuit lodged by Deno with the United States Patent and Trademark Office (USPTO) accuses Oracle of using fraudulent evidence to keep control of the trademark for Javascript, and of abandoning the trademark.
Oracle’s ownership over the term has upset developers, with many calling for restoration of Javascript as a public asset, free of corporate control.
Oracle acquired the name ‘Javascript’ as part of its purchase of Sun Microsystems. Deno's legal challenge has led to speculation on who really owns the tools that form the digital world we live in.
If Deno wins the lawsuit, developers will be free of legal uncertainty when using the term “Javascript”.
A win for Oracle would lead to continued confusion in the programming language industry, which in turn could limit creativity and innovation, leading to a less inspiring technological environment.
The outcome of the trial will have a great impact on the programming and web development community.
It will set a precedent on how open-source technologies balance corporate interests and community ownership.
Regardless of who wins, Javascript’s true legacy is in the hands of millions of developers who have built it, evolved with it, and helped to make it what it is today.
The decision may change the ecosystem, but it won't change the spirit of Javascript, which belongs to all of us.

Read Full Article

7 Likes

Dev

Image Credit: Dev

SQL Interview Questions: A Comprehensive Guide for Developers

A database is an organized collection of data, stored and retrieved digitally from a remote or local computer system.
DBMS (Database Management System) is a system software responsible for creating, retrieving, updating, and managing databases.
RDBMS (Relational Database Management System) stores data in tables and allows relations between tables through common fields.
SQL (Structured Query Language) is the standard language for relational database management systems, used for handling organized data and managing entities.

Read Full Article

5 Likes

Dev

268

Image Credit: Dev

The Justin Beiber database problem!

The Justin Beiber problem in database design refers to the issue of counting likes on Instagram posts, which can put a strain on the database server.
Instead of querying the likes table each time to count the likes, a solution is to have a likes_count column in the posts table.
Each time a post is liked, it creates a like record in the database and increments the likes_count column in the posts table.
By directly accessing the likes_count column, the application can retrieve the likes count faster and more efficiently.

Read Full Article

16 Likes

Dev

396

Image Credit: Dev

How to Detect and Defend Against SQL Injection Attacks – Part 4: Real-World Scenarios Deep Dive

This article examines four real-world SQL injection attack scenarios and the methods attackers used to gain access to sensitive data.
Heartland Payment Systems' 2008 SQL injection attack originated from a poorly secured web application and resulted in the theft of 130 million credit card numbers.
Sony Pictures' 2011 SQL injection attack exposed 47,000 employee records and led to financial losses and reputational damage.
Content Management Systems (CMS) like WordPress, Joomla, and Drupal are common targets for SQL injection. In 2018, attackers exploited a SQL injection vulnerability in a popular WordPress plugin to inject malicious payloads.
In a more recent example, attackers targeted an API endpoint of a financial institution to gain unauthorized access to sensitive financial records.
Blind SQL Injection, Error-Based SQL Injection, and Time-Based Blind SQL Injection are common methods used by attackers in SQL injection attacks.
Lack of input validation or sanitization, use of dynamic SQL queries, and insufficient database access controls are risk factors for SQL injection.
Developers prioritizing functionality over security, legacy systems, and outdated software introduce vulnerabilities, and misconfigurations expose applications to unnecessary risks.
Defensive strategies include regular code audits, advanced monitoring, security training, and adopting secure frameworks.
Organizations can proactively implement strategies to detect, prevent, and mitigate SQL injection threats.

Read Full Article

23 Likes

Dev

206

Image Credit: Dev

How I Solved the "MySQL Shutdown Unexpectedly" Error: A Step-by-Step Guide

Experiencing the MySQL shutdown unexpectedly error can be frustrating, especially when working on projects that depend on it.
The error can occur due to physically writing the file full.
To fix the issue, follow these steps: navigate to the data directory, backup the data, delete corrupted files, and restart MySQL.
Deleting corrupted log data and cleaning up unnecessary logs can solve the issue and prevent future interruptions.

Read Full Article

12 Likes

Dbi-Services

FreeBSD basics – 3 – Services

FreeBSD does not have a systemd-like system
The 'service' command is used to interact with services in FreeBSD
The 'REQUIRE' directive in service scripts defines startup order
Services can be enabled using the 'sysrc' utility or directly in '/etc/rc.conf'

Read Full Article

2 Likes

Dev

410

Image Credit: Dev

How to Detect and Defend Against SQL Injection Attacks(Part-1)[Must Read]

SQL injection is a common vulnerability where attackers can execute malicious code which is directly executed by the database server.
To detect SQL injection use both automated and manual testing and try inserting common SQL Injection payloads in the input fields.
Use of prepared statements with parameterized queries are effective defense against SQL injection attacks.
Cautiously involve ORM (Object-Relational Mapping) layers to interact with databases.
Whitelist expected input, use regular expression for expected pattern and escape input using appropriate escaping functions.
Employing web application firewalls can block malicious SQL injection attempts in real time.
Ensure that database accounts should have least privileges and do not expose database errors.
Conduct regular security testing to identify vulnerabilities.
SQL injection remains a risk that can be mitigated by taking preventative measures.
It is important to stay aware, conduct regular security testing, and apply the best practices to safeguard your system and secure sensitive data.

Read Full Article

24 Likes

Medium

288

Optimizing a Complex SQL Query

To optimize a complex SQL query, there are several strategies that can be applied.
Remove redundant joins to streamline the query execution.
Replace EXISTS subquery with INNER JOIN for improved performance.
Simplify ORDER BY clause to avoid potential issues with NULL values.

Read Full Article

17 Likes

Dev

402

Image Credit: Dev

🚀 Day 4: Lead & Opportunities Module and Analytics with Dynamic Charts

Today, the focus was on the Lead & Opportunities module and Analytics section.
Folder structure was organized for better file management.
Goals accomplished: Lead Registration, Display Leads, and Analytics Dashboard.
Key takeaways: Dropdown integration with Chart.js, lead management, and data visualization best practices.

Read Full Article

24 Likes

TechBullion

399

Image Credit: TechBullion

How to Resolve Page-Level Corruption in MS SQL Databases

Page-level corruption in MS SQL databases often leads to data inconsistency, system crashes, and potential data loss. Various factors know and unknow, contribute to page-level corruption. Addressing these issues proactively is very important to safeguarding valuable data assets.
Hardware problems such as disk drives that are about to fail, or memory problems can lead to slick page-level corruption in MS SQL databases.
A recovery checklist is critical before any operations are performed. Before we start, please take a full database backup to secure the data.
DBAs need to understand the potential impact of page-level corruption and know how to fix it in SQL Server databases as soon as corruption is detected to avoid severe disruptions.
In-built options like DBCC CHECKDB with REPAIR_ALLOW_DATA_LOSS and REPAIR_REBUILD, provide immediate solutions for page-level corruption.
Third-party SQL recovery tools, such as Stellar Repair for MS SQL, offer advanced capabilities for addressing complex page-level corruption that built-in options may not resolve.
Configuring a robust backup strategy involves determining the frequency of backups, choosing appropriate backup types (full, differential, or transaction log), and verifying the integrity of these backups.
Implementing SQL Server maintenance plans is crucial for database health. Regular index rebuilds help optimize performance by removing fragmentation, ensuring efficient data retrieval.
Ensuring that the SQL Server instance has adequate resources is critical for maintaining optimal performance.
Adopting effective SQL recovery tools and practices is essential. Stellar Repair for MS SQL stands out as a reliable option, offering advanced features to handle page-level corruption efficiently.

Read Full Article

23 Likes

Dbi-Services

212

FreeBSD basics – 2 – Users & Groups

Users and groups are managed in FreeBSD through the pw command. The adduser command is a wrapper around pw that provides an interactive way to create users. FreeBSD has a concept of login classes, which are used to set up user environments and optionally put restrictions on resource usage.
Login classes are defined in /etc/login.conf. Normal users are not allowed to read /etc/master.passwd but can get basic account information out of /etc/passwd. If you check /etc/passwd on a FreeBSD system, you'll see the hashed passwords. In adduser, the command created a new ZFS file system for the user.
The login access control table in FreeBSD is similar to PostgreSQL's pg_hba.conf. It can define who, from where, networked or not, is either accepted to login or not. The access control table can be found in /etc/login.access on FreeBSD.

Read Full Article

12 Likes

Dev

437

Image Credit: Dev

Avoid SELECT *, even on a single-column tables

Using SELECT * means that the database optimizer cannot choose index-only scans.
The computational overhead of deserialization can slow down query performance.
Not all columns are stored inline, and retrieving large columns like blobs increases I/Os.
Before the query result is sent to the client, it is serialized according to the communication protocol supported by the database, which affects network latency.
Client apps must deserialize the data after they receive the raw bytes, adding to overall processing time.
Using SELECT * on the client side, even if the table has one or two fields, can introduce unpredictability.
Explicit SELECT makes it easier to grep the codebase for in-use columns and make database schema changes.
It’s generally best to only select necessary fields to reduce unnecessary overhead when querying tables.
However, for tables with few columns and simple data types, SELECT * overhead may be negligible.
Be selective about the columns retrieved in queries to improve overall query performance.

Read Full Article

26 Likes

VentureBeat

Image Credit: VentureBeat

Breaking the cloud backup ‘black box’ with intelligent data mapping and retrieval

Eon, an Israel and New York-based start-up founded by a team of ex-AWS engineers, has come up with a new cloud-native backup solution.
The service continuously maps and backs up resources for enterprises, depending on the type of data involved.
It makes these backups usable by letting users retrieve specific files or records according to their needs and is challenging the status quo in the cloud backup domain.
The approach to setting up these backups has largely remained the same: static and error-prone.
Eon creates snapshots by automating resource mapping, classification, and policy association.
After creating the snapshots, the company makes them accessible to users, with global search across all the backed-up data.
This gives users the ability to locate and restore relevant data down to specific files.
Eon is essentially making cloud backups smart and immediately usable- unlike what's been the story so far.
As of now, Eon is working to scale its offering and is engaging with dozens of companies across industries.
It will be interesting to see how the company continues to differentiate in the highly competitive cloud backup space.

Read Full Article

4 Likes

Dbi-Services

283

FreeBSD basics – 1 – The first steps

FreeBSD is a complete operating system (including packages and ports), while Linux usually refers to the kernel only.
FreeBSD comes with almost everything you need by default.
Additional programs in FreeBSD do not go to either “/bin/” or “/usr/bin”, they go to “/usr/local/bin”.
Additional configuration files in FreeBSD to not go to “/etc” but into “/usr/local/etc/”.
You can add permanent network configurations in FreeBSD using the “sysrc” utility.
Name resolution is configured in “/etc/resolv.conf“ in FreeBSD.
System updates in FreeBSD can be done using “freebsd-update”.
Updating or managing packages in FreeBSD is done with “pkg”.
Next step includes adding users and groups in FreeBSD.

Read Full Article

17 Likes

TheNewsCrypto

185

Image Credit: TheNewsCrypto

Oracle Corp Resumes its Legal Battle Against Crypto Oracle LLC

Oracle Corporation has resumed its legal battle against Crypto Oracle LLC.
The lawsuit accuses Crypto Oracle of trademark infringement and dilution.
Oracle Corporation is seeking injunctive relief and damages.
Several other crypto firms have faced similar trademark infringement lawsuits.

Read Full Article

11 Likes

For uninterrupted reading, download the app

Databases

Discover more