摘要：
SELECT DISTINCT Company FROM Orders SELECT * FROM Persons WHERE City='Beijing'SELECT * FROM Persons WHERE FirstName='Bush'--字符串要加单引号SELECT * FROM Persons WHERE Year>1965--日期不用加单引号SELECT * FROM Persons WHERE FirstName='Thomas' AND LastName='Carter'SELECT * FROM Pers 阅读全文
posted @ 2014-01-17 12:44
西卡
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