SQL AND/OR operador

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SQL AND/OR operador

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SQL AND OR operador

WHERE o keyword p�de ser usado selecionar condicional dados de uma tabela. Esta circunst�ncia pode ser uma condi��o simples ou pode ser uma condi��o composta. As circunst�ncias compostas s�o compostas das circunst�ncias simples m�ltiplas conectadas perto AND/OR. N�o h� nenhum limite ao n�mero das circunst�ncias que podem estar atuais em uma �nica indica��o do SQL.

Sintaxe da condi��o composta

SELECT "column_name"
FROM "table_name"
WHERE "simple condition"
{[AND|OR] "simple condition"}+

Nota: - {} + significa que a express�o dentro do suporte ocorrer� um ou muitos times.AND AND OR pode ser usado permutavelmente. Al�m, para indicar a ordem da circunst�ncia n�s podemos usar o sinal do par�ntese ().

por exemplo n�s podemos desejar selecionar todo o store_name com as lojas das vendas mais extremamente de $1.000 ou todo o com vendas mais menos de $500 mas mais extremamente de $275 na tabela Store_Information,

Store_name	Sales	Date
Los Angeles	$1500	Jan-05-2005
San Diego	$250	Jan-07-2005
Los Angeles	$300	Jan-08-2005
Boston	$700	Jan-08-2005

Para selecionar a pergunta seguindo do store_name:

SELECT store_name FROM Store_Information WHERE Sales > 1000 OR (Sales < 500 AND Sales > 275)

Sa�da

store_name

Los Angeles

San Francisco

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s Keywords Usu�rio do sql dos, tutorial do sql, indica��o do sql, sql select

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