Shadowing Practice: PostgreSQL in 100 Seconds - Learn English Speaking with Video

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PostgreSQL, the most trusted name in open -source relational databases.
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Its development dates all the way back to 1986 at UC Berkeley, under the direction of Michael Stonebraker.
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Like other pure relational databases, it stores data in tables, columns, and rows, and uses structured query language to read and write data.
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However, PostgreSQL is technically an object relational database, which means it can create its own custom data types to store objects with properties
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and support advanced features like inheritance and polymorphism.
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When writing data, it runs fully ACID -compliant transactions, but also adds its own special sauce called multi -version concurrency control,
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which gives each transaction a snapshot of the database, allowing multiple transactions to run at the same time without traffic jams or locks.
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Developers also love its extensibility.
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Queries can be reused by writing stored procedures, and it even supports languages beyond SQL like Python and C.
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And it has a robust ecosystem of extensions, like PostGIS to provide geospatial data for apps like Uber, or Citus to shard and distribute the database to any scale,
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or PG embedding to give AI chatbots long -term memory, and the list goes on.
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To get started, you can download and install it locally, or better yet, use a free cloud database like Neon, which provides autoscaling out of the box and a nice UI to manage your data,
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in addition to a bunch of other advanced features like branching.
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Create a new database, then head over to the SQL editor to run your first query, or connect it to your IDE with an extension like SQL tools we could get started by creating a new table.
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But because this is an object -relational database, let's begin by creating a custom data type, which defines the structure of an object with corresponding properties and types.
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What's awesome about Postgres, though, is that we have more exotic data modeling options, like arrays can be used by putting brackets in front of a type,
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then make it a two -dimensional array by adding another set of brackets.
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We also have JSON data types to handle unstructured data, and even key value pairs with extensions like hstore.
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Now that we have this custom type, we can use it within one or more tables, like one table for programmers and another for designers.
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Once the table is created, we can then use an insert statement to add a row of data into it.
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Notice the use of a double colon to cast a string into JSON or H store types.
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And now finally, we can read the data with a select statement
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that uses dot notation to access the properties on our custom object.
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Every table has a unique primary key, and we can create relationships by storing the primary key from one table as the foreign key on another, like a programmer might own many Lambos.
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We can then find those Lambos by doing a join query that compares the programmer's ID to the Lambo's owner ID.
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This has been PostgreSQL in 100 seconds.
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Big shout out to NeonDB for sponsoring and making this awesome database free to use in the cloud.
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Thanks for watching, and I will see you in the next one.
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Vocabulario y notas de pronunciación para esta lección

Esta lección de conversación se basa en el vídeo “PostgreSQL in 100 Seconds”. Las palabras que más se repiten: database, table, type, object, relational. Este vídeo tiene 28 frases y 539 palabras para practicar shadowing. La parte hablada dura 2:36. El hablante habla rápido, unas 207 palabras por minuto, así que espera sonidos enlazados y reducidos. Solo el 75 % de las palabras está entre las 3.000 más comunes del inglés, por lo que el vocabulario es exigente.

Vocabulario clave de este vídeo

15 palabras del vídeo que vale la pena aprender, con su pronunciación y significado:

PalabraPronunciaciónSignificado
database sustantivo/ˈdeɪtəˌbeɪs/base de datos, banco de datos
custom sustantivo/ˈkʌstəm/costumbre, usanza
query sustantivo/ˈkwɪɹ.i/consulta, pregunta
extension sustantivo/ɪkˈstɛnʃən/extensión, extendimiento
transaction sustantivo/tɹænˈzækʃən/transacción
cloud sustantivo/ˈklaʊ̯d/nube, nimbo
array sustantivo/əˈɹeɪ/atavío, galas
bracket sustantivo/ˈbɹækɪt/consola, soporte
programmer sustantivo/ˈpɹoʊɡɹæmɚ/programador, programadora
compare verbo/kəmˈpɛɚ/comparar, parangonar
select verbo/sɪˈlɛkt/seleccionar, cribar
procedure sustantivo/pɹəˈsiː.d͡ʒə/procedimiento
designer sustantivo/dɪˈzaɪnɚ/diseñador, diseñadora
string sustantivo/stɹɪŋ/cuerda, mecate ("cordel" or "cuerda")
connect verbo/kəˈnɛkt/conectar, empalmar

Pronunciación a tener en cuenta

  • Los sonidos de “sh” y “zh”: extension /ɪkˈstɛnʃən/, transaction /tɹænˈzækʃən/, shout /ʃaʊt/, dimensional /daɪˈmɛn.ʃə.nəl/, notation /noʊˈteɪʃən/
  • Palabras largas — cuida el acento: developer /dɪˈvɛləpɚ/, technically /ˈtɛk.nɪˌkəl.i/, dimensional /daɪˈmɛn.ʃə.nəl/, inheritance /ɪnˈhɛɹɪtəns/, ecosystem /ˈikoʊˌsɪstəm/

Sonidos difíciles para hispanohablantes:

  • s + consonante al inicio — sin añadir una “e” delante: string /stɹɪŋ/, sponsor /ˈspɒn.səː/, snapshot /ˈsnæpʃɒt/
  • /z/ — sonora, no /s/: transaction /tɹænˈzækʃən/, designer /dɪˈzaɪnɚ/, columns /ˈkɑləmz/, exotic /ɪɡˈzɑtɪk/, polymorphism /pɑliˈmɔɹfɪz(ə)m/
  • /dʒ/ — no es la “y” ni la “ch”: procedure /pɹəˈsiː.d͡ʒə/, jam /ˈd͡ʒæm/

Cómo practicar con este vídeo

  1. Escucha el vídeo entero una vez sin hablar y anota las palabras que no conoces.
  2. Empieza a velocidad 0,75×, haz shadowing frase por frase y vuelve a la velocidad normal cuando te resulte fácil.
  3. Grábate y compara con el original, prestando atención a palabras como database, custom, query.

¿Qué es la Técnica de Shadowing?

Shadowing es una técnica de aprendizaje de idiomas respaldada por la ciencia, desarrollada originalmente para la formación de intérpretes profesionales y popularizada por el políglota Dr. Alexander Arguelles. El método es simple pero poderoso: escuchas audio en inglés nativo y lo repites en voz alta de inmediato, como una sombra que sigue al hablante con solo 1-2 segundos de retraso. A diferencia de la escucha pasiva o los ejercicios de gramática, el shadowing obliga a tu cerebro y músculos de la boca a procesar y reproducir simultáneamente patrones de habla reales. Las investigaciones muestran que mejora significativamente la precisión de la pronunciación, la entonación, el ritmo, el habla conectada, la comprensión auditiva y la fluidez al hablar, convirtiéndola en una de las metodologías más efectivas para la preparación del IELTS Speaking y la comunicación en inglés en el mundo real.

Técnica de shadowing: lee la guía completa paso a paso →