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Databases
Dev
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Indexes in SQL | Clustered and Non Clustered Index
- Indexes in SQL are special data structures designed to optimize the speed of data retrieval operations from database tables.
- There are two types of indexes in SQL: clustered index and non-clustered index.
- A clustered index determines the physical order of data in a table, while a non-clustered index creates a separate structure with pointers to the physical data.
- Clustered indexes are efficient for range queries and faster retrieval for queries filtering on the clustered index column, while non-clustered indexes improve performance for queries on non-primary key columns.
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Dev
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122
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Best Practices for Handling Sensitive Data in MySQL Databases
- Protecting sensitive data is critical in the digital landscape, particularly from cyber threats.
- MySQL offers TDE to encrypt sensitive data stored in the database.
- TLS or SSL must be used to encrypt the data transmitted between the application and MySQL database.
- Storing user passwords in plain text should be avoided, and strong hashing algorithms like bcrypt, Argon2, or PBKDF2 must be used.
- MySQL allows the creation of roles with specific privileges to implement strict access controls.
- Regular auditing of user permissions for appropriate and up-to-date access rights is essential.
- The best practice for configuration must be followed to secure the MySQL installation.
- The system credentials must be kept secure by using environment variables instead of storing sensitive configuration data in application code.
- Data masking techniques must be utilized in the development or testing environments.
- Encryption and secure storage practices must be implemented for backups.
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Dbi-Services
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402
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PostgreSQL Conference Europe 2024 – Day 1
- Attending PostgreSQL Conference Europe 2024 in Athens is an incredible experience, full of enriching conversations and technical deep dives.
- The atmosphere was welcoming, with everyone eager to exchange knowledge and showcase their passion for PostgreSQL.
- Keynote highlighted the licensing structure of PostgreSQL, emphasizing its free and open-source nature.
- Sessions covered topics like high concurrency, distributed snapshots, security attacks, and Patroni deployment patterns.
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Dev
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301
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Essential MySQL Operators and Their Applications
- MySQL operators are key tools for developers, enabling precise data manipulation and analysis.
- The guide introduces the most important MySQL operators and demonstrates how to use them with practical examples.
- Operators covered include :=, >>, BETWEEN X and Y, IS | IS NOT, RLIKE, and SPACE().
- Understanding MySQL operators is crucial for efficient database management and query optimization.
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Medium
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384
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Unlocking the Power of SQL: The Language of Databases
- SQL is a powerful language for managing data in databases like Oracle, MySQL, and SQL Server.
- SQL has an intuitive syntax and is standardized, making it accessible and consistent across multiple databases.
- It allows for filtering, sorting, grouping, and aggregating data, ensuring data integrity and efficient management of large datasets.
- SQL has built-in functions for summarizing and analyzing data, making it essential for data analysts.
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Medium
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100
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Save Time by Creating Views in SQL
- Creating views in SQL can save time for programmers and allow for faster data access and organization.
- Views are pre-formatted queries that can be saved and called, ultimately eliminating the need to re-write code.
- While not necessary for every query written, views should be created for common logic and frequently accessed queries.
- Views can be joined together to encapsulate logic or create tables for tens or hundreds of millions of rows.
- Views are not inherently fast, but can be optimized and used to pull the most recent data.
- Going through views daily can help catch mistakes and improve logic which ultimately speeds up data analysis.
- By creating layers and reusable code, programmers can focus on data quality and analysis rather than figuring out how to pull the data repeatedly.
- Creating a fact layer that uses the cleanest views that programmers have created can serve as a single source of truth.
- In the end, organizing and creating views will improve proficiency and make data analysis a smoother and more efficient process for all involved.
- These views can be beneficial to data scientists, data analysts and data engineers creating pipelines for everyone involved in the data management process.
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Amazon
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306
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Evaluating the right fit for your Amazon Aurora workloads: provisioned or Serverless v2
- Amazon Aurora is a managed, cloud-native relational database service with MySQL and PostgreSQL compatibility, designed to offer the performance and availability of commercial databases at a lower cost.
- Aurora uses distributed architecture that separates compute capacity from storage, providing up to 128 TB of storage, high performance, and 99.99% availability.
- Important concepts of Aurora provisioned and Aurora Serverless v2 databases include clusters and instances, advantages of this architecture, and capacity and pricing.
- Aurora Serverless v2 scales the size of an Aurora instance based on workload and enables a richer feature compatibility with provisioned instances.
- Capacity of Aurora Serverless v2 is defined by Aurora Capacity Unit (ACU), and pricing is based on ACU-hours, which ensures the most precise fit of resources to your workload.
- Aurora Serverless v2 is available in all regions where Amazon Aurora is available, and the version support is similar to provisioned instances.
- Aurora Serverless v2 ensures feature compatibility and upgrades are the same as for provisioned instances.
- When planning for performance with Aurora Serverless v2, you will need to consider additional factors like minimum ACU, rate of instance scale, and buffer pool capacity, among others.
- Amazon Aurora provides a cluster endpoint which always points to the current writer node in the cluster, and Aurora Global Database offers the ability to maintain a live copy of your database cluster in up to five additional AWS Regions.
- Provisioned instances and Aurora Serverless v2 instances are complementary; choose which one is the best fit for your workload and validate these assumptions to optimize your database solutions on AWS.
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VentureBeat
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323
Differentiable Adaptive Merging is accelerating SLMs for enterprises
- Differentiable Adaptive Merging (DAM) is offering a new approach to model merging, addressing the complexity of the process.
- Arcee, a company specializing in small language models, is leading research on DAM.
- DAM adjusts the contribution of each model through scaling coefficients and optimizes the merge process using established machine learning techniques.
- DAM performs competitively with existing methods and offers efficient merging of specialized models.
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The New Stack
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How To Stop Worrying and Start Loving Databases on Kubernetes
- Kubernetes has transformed deployment and management for cloud native applications. However, many teams still hesitate when running databases on Kubernetes due to concerns about storage persistence, data integrity and operational complexity.
- Kubernetes uses the term 'Operator Pattern' to define an algorithm for managing stateful workloads. Kubernetes Operators are codebases that encapsulate operational knowledge into automation tasks that manage stateful deployments on Kubernetes.
- When choosing a Kubernetes Operator, essential factors to consider include: backups, monitoring, disaster recovery, high availability and connection scaling.
- When it comes to cloud native principles, storage architecture, disk storage solutions and object storage should be considered for backups and transaction logs.
- Kubernetes' strength is scaling applications effortlessly. Modern Kubernetes database operators enable vertical, horizontal and down scaling, as well as routine updates and maintenance.
- A known path paved with mature Operators is available for running databases on Kubernetes. By doing so, teams can build on the success of prior experience and offer innovative applications that achieve user value.
- To learn more about Kubernetes and the cloud native ecosystem, join KubeCon + CloudNativeCon North America, in Salt Lake City, Utah, on Nov. 12-15, 2024.
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Cloudblog
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Spanner and PostgreSQL at Prefab: Flexible, reliable, and cost-effective at any size
- Prefab uses Spanner’s PostgreSQL interface as a datastore for customer’s configurations, feature flags and generated client telemetry, with no downtime to date, a versatile Swiss Army knife of a database VMware Tanzu can be used to spin up Kubernetes clusters.
- Spanner, with its PostgreSQL interface, offers the resilience and uptime of Google-scale, massively-replicated database with the simplicity and portability that makes PostgreSQL so appealing.
- At a small scale, operating a database instance per environment can be annoyingly expensive, but the Spanner’s scale can now scale down to less than a full node, making it an even easier choice.
- Recent updates to Spanner and Google Cloud ecosystem address some early bumps to using the PostgreSQL interface to Spanner.
- A single Spanner instance can be multi-availability zone replicated to provide excellent reliability bearing in mind the crucial role feature flags and dynamic configuration systems have in not being overwhelmed by demand.
- Spanner's PostgreSQL interface is being used by Prefab to great effect. Optimization tools such as Spanner's Query editor which allows for query investigation and Key visualizer helps analyze Spanner's data access patterns to diagnose many common hotspots and locating common issues.
- The UI for Spanner, works well for analyzing and figuring out how many log statements will output to various levels using the Prefab UI. This data effectively helps to serve the downstream and upstream customers of the developers.
- Users new to Spanner should consider expanding their horizons and working with this versatile and effective tool that offers better reliability and scale.
- For new projects, developers would be wise to consider the increased usability and versatility of using Ruby on Rails directly on Spanner.
- Adoption of Spanner has allowed Prefab to achieve the same scaling benefits as HBase but without the headaches of doing it themselves. This has proven to be less expensive for Prefab as they no longer have to factor in several points of non-existent failure and lower operating costs.
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Dev
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354
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Context Switching in PLSQL
- Context switching refers to the process of switching between the SQL and PL/SQL engines in Oracle databases.
- When executing SQL queries, if a query calls a PL/SQL function, control switches from the SQL engine to the PL/SQL engine and back once the function completes.
- Context switching can introduce overhead and impact performance, especially if the function is called repeatedly in a query processing many rows.
- To minimize the impact of context switching, consider using inline functions, reducing the number of function calls, and utilizing techniques like Pipelined Table Functions or bulk processing.
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Dev
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315
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Summary of Horizontal and Vertical Partitioning
- Horizontal partitioning involves dividing a table into smaller pieces based on rows, improving query performance and manageability.
- Types of horizontal partitioning include range partitioning, list partitioning, and hash partitioning.
- Vertical partitioning involves dividing a table into smaller tables based on columns, enhancing performance and optimizing data management.
- Types of vertical partitioning include normalization, BLOB separation, and in-memory storage.
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Dev
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236
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Interval Partitioning in Oracle SQL
- Interval partitioning is a type of partitioning that automatically creates new partitions based on a defined interval for a specific column, typically a date or timestamp.
- The main benefits of interval partitioning are simplicity, efficient data management, and improved query performance.
- To use interval partitioning in Oracle SQL, you need to define the interval and create an interval partitioned table.
- When inserting data beyond existing partition boundaries, Oracle automatically creates new partitions.
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Dev
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0
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Partition in Oracle | Revision49
- Partitioning in Oracle SQL refers to the process of dividing a large database table into smaller, more manageable pieces, called partitions.
- Partitioning is required for performance optimization, improved manageability, increased availability, and data locality.
- The different types of partitioning in Oracle SQL include range, list, hash, and composite.
- Understanding partitioning allows administrators to design tables that optimize data access and maintenance based on specific use cases.
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Dev
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100
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Automatic Indexing in Oracle 19c version
- Machine learning is essential in Oracle 19c's Automatic Indexing, enabling the automatic creation, management, and optimization of indexes based on workload patterns.
- Observing Patterns: The system watches which SQL queries are run most frequently and suggests or creates new indexes for the columns most often used in those queries.
- Adjusting Over Time: The system can remove or change indexes that are no longer used to keep things efficient.
- Machine learning in automatic indexing significantly improves database performance by intelligently managing indexes according to real-time data and evolving patterns.
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