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Attach:附加數(shù)據(jù)庫； Detach:分離數(shù)據(jù)庫；查看全部
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下載地址查看全部
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RDBMS是關(guān)系型數(shù)據(jù)庫管理系統(tǒng)查看全部
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Mongo DB Database的代碼也是開放的，對用戶是可見的查看全部
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MySQL Database是免費的，開放的查看全部
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常用數(shù)據(jù)庫查看全部
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edit---advance option -lines查看全部
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having 是專門用來對函數(shù)（最大值、最小值、和、差）進行限制和運算的查看全部
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select SalesPersonID,Max(TotalDel) as MaximumTotalDel from A where SalesPersonID is not null group by salesPersonId, order by XX查看全部
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select Avg(TotalDue)as AverageTotalSales ,Min(TotalDue)as MiniumTotalSales ,Max()as XX ,Sum() as XX from A查看全部
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select Avg(TotalDue)as AveragrTotalSales from [Sales].[SalesOrderHeader]查看全部
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select distinct(A.column) from B查看全部
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select * from A where size is null select * from A where size is not null查看全部
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select * from A where class not in ('H')------也可 same as using ： <> 'H'查看全部
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select * from A where color in ('red','while','black') select * from B where size in ( '60','61','62')查看全部
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