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CREATE TEMP TABLE personas ( nombre_completo TEXT ); INSERT INTO personas VALUES ('Ana María'), ('Luis Alberto'); -- Consulta: obtener primera letra de cada palabra SELECT nombre_completo, string_agg(SUBSTRING(word FROM 1 FOR 1), '') AS iniciales FROM ( SELECT nombre_completo, unnest(string_to_array(nombre_completo, ' ')) AS word FROM personas ) AS sub GROUP BY nombre_completo;

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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code

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