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Operadores Condcionais SQL

OR:

  • Se uma das expressões for verdadeira a expressão completa será verdadeira.
    • Exemplos:
    • (V) OR (V) → Verdadeiro
    • (V) OR (F) → Verdadeiro
    • (F) OR (V) → Verdadeiro
    • (F) OR (F) → Falso

AND:

- Se todas as expressões forem verdadeiras a expressão completa será verdadeira. - Exemplos: - (V) AND (V) → Verdadeiro - (V) AND (F) → Falso - (F) AND (V) → Falso - (F) AND (F) → Falso

NOT:

- Se a expressão for verdadeira, com o NOT colocado na frente ele vira falsa. - Se a expressão for falsa, com o NOT colocado na frente ele vira verdadeiro.

LIKE

SELECT * FROM TABELA WHERE CAMPO LIKE '%CONDIÇÃO%'

%CONDIÇÃO% -> O símbolo % é usado para representar qualquer registro genérico.
Equivalente ao * quando manipulamos arquivos.

Exemplo:

SELECT * FROM TB_CLIENTES WHERE NOME LIKE '%Soares%' 
-> Mostrará todas os nomes que tenham Soares. Em qualquer parte do nome.
'%Soares' -> Mostrará apenas os nomes que tenham Soares apenas no final do nome.
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