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Como ler SQL: O método do contrainterrogatório para verificar consultas escritas por você, pela sua equipe ou por IA
Paperback
Publisher: Independently Published
Published: Aug 2 2026
Pages: 266
Weight: 0.79
Height: 0.56 Width: 6.00 Depth: 9.00
Language: Portuguese
Uma consulta pode executar sem erros e ainda responder à pergunta errada.
Como ler SQL ensina um método prático para verificar consultas escritas por você, pela sua equipe ou por IA antes que um resultado incorreto chegue a um relatório, dashboard ou decisão de negócio.
Com o método LER - PREVER - TESTAR - PROVAR, você aprenderá a:
- traduzir uma consulta SQL para linguagem de negócio;
- prever a granularidade e a contagem de linhas antes da execução;
- detectar fanout, multiplicação de linhas e agregações incorretas;
- identificar filtros que eliminam dados silenciosamente;
- interpretar corretamente joins, NULLs, funções de janela, rankings e pivots;
- testar limites de datas, meias-noites e erros de off-by-one;
- conciliar totais e verificar resultados com evidências independentes;
- revisar SQL legado, SQL de colegas e SQL gerado por IA;
- registrar um veredito claro: correto, correto com ressalvas ou errado.
Os capÃtulos usam um conjunto de dados controlado e consultas executadas para mostrar não apenas como encontrar erros, mas também como provar que uma consulta está correta.
Este livro é destinado a analistas de dados, DBAs, desenvolvedores, engenheiros de dados, profissionais de qualidade e qualquer pessoa responsável por confiar nos resultados de uma consulta SQL.
Executar sem erro não prova nada. Aprenda a ler, testar e provar o que uma consulta realmente faz.
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