Scripts sql finalizados #1
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gcestaro
reviewed
Nov 16, 2021
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| SELECT l.titulo AS LIVRO FROM livros l | ||
| WHERE l.titulo LIKE '%java%'; |
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e se tiver JAVA ou Java, funciona?
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Funciona, o LIKE por padrão não é case-sensitive
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Legal, cuidado que isso não é uma verdade em todos os bancos de dados. No Oracle, até a versão 12c por exemplo, não é.
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| CREATE TABLE IF NOT EXISTS emprestimos( | ||
| id_e INT AUTO_INCREMENT NOT NULL, | ||
| livro VARCHAR(17) NOT NULL, |
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é legal ter uma referência de o que está usando do livro, usuário e outras FKs. Exemplo: ao invés de livro, poderia usar isbn_livro ou id_livro, pq só livro poderia ser qualquer coluna da tabela livro, geralmente o id, mas vale deixar explícito :)
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