A.Select * from [order details] Order by quantity desc
B.Select * from [order details] Order by quantity asc
C.Select * from [order details] Order by quantity
D.Select * from [order details] Order by desc quantity
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A.SELECT * FROM Products WHERE UnitPrice >= 20 OR UnitPrice <= 40
B.SELECT * FROM Products WHERE UnitPrice BETWEEN 20 OR 40
C.SELECT * FROM Products WHERE UnitPrice >= 20 AND UnitPrice <= 40
D.SELECT * FROM Products WHERE UnitPrice BETWEEN 20 AND 40
A.SELECT Product Name AS’產(chǎn)品的名稱’,Unit Price AS’單價(jià)’FROM Products
B.SELECT Product Name=產(chǎn)品的名稱,Unit Price=單價(jià)FROM Products
C.SELECT Product Name=“產(chǎn)品的名稱”,Uni tPrice=“單價(jià)”FROM Products
D.SELECT Product Name’產(chǎn)品的名稱’,Unit Price’單價(jià)’FROM Products
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最新試題
DELETE語(yǔ)句中使用JOIN子句執(zhí)行跨表刪除時(shí),有INNER、LEFT、RIGHT即內(nèi)連接、左連接、右連接等不同的連接方式。
視圖就是一個(gè)虛表,保存視圖時(shí),保存的是視圖的定義。
正常情況下一般刪除命令都會(huì)有帶WHERE子句。
存儲(chǔ)過(guò)程一經(jīng)定義,就可以被反復(fù)調(diào)用,從而實(shí)現(xiàn)了代碼的復(fù)用性、封裝性、高性能等。
MySQL數(shù)據(jù)庫(kù)中,通常將用戶寫(xiě)入對(duì)應(yīng)的權(quán)限表來(lái)控制訪問(wèn)權(quán)限的,以下屬于用戶權(quán)限得選項(xiàng)()