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    <description>Short, friendly articles about the SQL ideas behind the SQLazo path.</description>
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    <lastBuildDate>Sat, 26 Sep 2026 10:28:54 GMT</lastBuildDate>
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      <title>SQL joins for beginners: how tables shake hands</title>
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      <description>Why tables rarely live alone, and how INNER JOIN and LEFT JOIN turn them into one. With examples from the SQLazo record store.</description>
      <pubDate>Tue, 04 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Joins de SQL para principiantes: cómo se dan la mano las tablas</title>
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      <description>Por qué las tablas rara vez viven solas, y cómo INNER JOIN y LEFT JOIN las convierten en una sola. Con ejemplos de la tienda de discos de SQLazo.</description>
      <pubDate>Tue, 04 Aug 2026 00:00:00 GMT</pubDate>
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      <title>GROUP BY in plain words</title>
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      <description>What really happens when SQL groups rows: counting, summing and the difference between WHERE and HAVING.</description>
      <pubDate>Tue, 04 Aug 2026 00:00:00 GMT</pubDate>
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      <title>GROUP BY en palabras llanas</title>
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      <description>Qué ocurre de verdad cuando SQL agrupa filas: contar, sumar y la diferencia entre WHERE y HAVING.</description>
      <pubDate>Tue, 04 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Window functions, introduced gently</title>
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      <description>Rankings, running totals and rows that see other rows — the window functions superpower, explained without the jargon.</description>
      <pubDate>Tue, 04 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Funciones de ventana, presentadas con calma</title>
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      <description>Rankings, totales acumulados y filas que ven a otras filas — el superpoder de las funciones de ventana, explicado sin tecnicismos.</description>
      <pubDate>Tue, 04 Aug 2026 00:00:00 GMT</pubDate>
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      <title>A tour of the record store database</title>
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      <description>Meet the tables behind every SQLazo exercise: artists, albums, tracks, customers and the invoices that tie them together.</description>
      <pubDate>Tue, 04 Aug 2026 00:00:00 GMT</pubDate>
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      <title>Un paseo por la base de datos de la tienda de discos</title>
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      <description>Conoce las tablas que hay detrás de cada ejercicio de SQLazo: artistas, álbumes, canciones, clientes y las facturas que lo unen todo.</description>
      <pubDate>Tue, 04 Aug 2026 00:00:00 GMT</pubDate>
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