que es sql y nosql? cuales son sus diferencias y cuando deberías utilizarlos
HolaMundo
12 min, 48 sec
The video explains the differences between SQL and NoSQL databases, their advantages, and when to use each type.
Summary
- The history of SQL is discussed, including its development at IBM and adoption by companies like Oracle.
- SQL databases use tables with rows and columns and allow for data to be easily written when modeled correctly.
- NoSQL databases, existing since the 1960s, offer greater scalability and flexibility for certain types of applications.
- NoSQL is ideal for read-heavy applications, while SQL is better for write-heavy scenarios.
- The video covers the ACID properties of transactions in databases and shares Amazon's transition from SQL to NoSQL.
Chapter 1
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Introducing the comparison between SQL and NoSQL databases and what to expect in the video.
- The video begins with a greeting and a preview of the content, comparing SQL and NoSQL databases.
- The advantages of each database type and appropriate situations for their use are mentioned.
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Chapter 2
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Exploration of SQL's origins and its early development.
- SQL was developed at IBM by Donald Chamberlin and Raymond Boyce after studying the relational model of Edgar Codd.
- IBM initially used SQL with clients but didn't commercialize database engines until much later.
- Oracle, originally called Relational Software, quickly adopted SQL and created products around it.
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Chapter 3

Overview of SQL database structure, syntax, and advantages for data storage and retrieval.
- SQL databases store data in spreadsheet-like tables with rows and columns, using primary keys for relationships.
- The syntax of SQL allows developers to join data from different tables efficiently.
- Writing data in SQL is fast when tables are modeled in third normal form, but reading joined data can be slower.
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Chapter 4
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Diving into the characteristics of NoSQL databases and their historical context.
- NoSQL, standing for 'Not Only SQL' or 'Not SQL', emerged as a term in the late 2000s.
- The first use of NoSQL was in 1998 by Carlo Strozzi for a relational database that did not use SQL.
- NoSQL databases have been around since the 1960s but gained popularity in the 21st century.
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Chapter 5
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Explaining how NoSQL databases handle data and the responsibilities placed on developers.
- NoSQL databases do not have fixed relations, making data joining the responsibility of the developer.
- Developers must retrieve and combine data from various collections through code.
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Chapter 6

Comparing NoSQL's scalability and flexibility to traditional SQL databases.
- NoSQL databases can scale horizontally by adding more servers, which is often more cost-effective.
- They generally do not have fixed schemas, allowing easier updates to data structures and nested data within collections.
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Chapter 7
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Discussing how to model data in NoSQL databases compared to SQL databases.
- NoSQL databases are modeled based on the views of an application, making data retrieval for specific views faster.
- SQL databases are efficient for writing data within the same table but slower for reading from multiple tables.
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Chapter 8
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Elaborating on the ACID properties of transactions in databases.
- ACID stands for Atomicity, Consistency, Isolation, and Durability, ensuring reliable transaction processing.
- Both SQL and NoSQL databases support transactions with these properties.
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Chapter 9
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Sharing the story of how Amazon shifted from a SQL to a NoSQL database model.
- Amazon switched to NoSQL to improve performance and user experience, especially in their shopping cart system.
- The Dynamo paper influenced the design of highly available databases, prioritizing availability over immediate consistency.
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Chapter 10
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Wrapping up the video and inviting the audience to engage with the content.
- The presenter concludes the video, asking for likes and subscriptions, and encourages comments and course sign-ups.
- Anecdotes and stories are used to make the content relatable and engaging.
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