A.AND
B.NOT
C.OR
D.XOR
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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
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’FROM Products
B.SELECT Product Name=產(chǎn)品的名稱,Unit Price=單價FROM Products
C.SELECT Product Name=“產(chǎn)品的名稱”,Uni tPrice=“單價”FROM Products
D.SELECT Product Name’產(chǎn)品的名稱’,Unit Price’單價’FROM Products
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B.SELECT productname,price from products order by price DESC
C.SELECT productname,price from products order by price
D.SELECT productname and price from products order by price DESC
A.select * from table_name where 1<=2
B.truncate table table_name
C.delete from table_name where null=null
D.alter table table_name add column idd int
最新試題
用戶可以超出權(quán)限控制對數(shù)據(jù)庫進(jìn)行訪問。
存儲過程命名規(guī)則與數(shù)據(jù)庫、數(shù)據(jù)表、列等標(biāo)識符命名可以隨心所欲,不需要規(guī)則一致。
在MySQL中,使用insert語句向數(shù)據(jù)庫表插入數(shù)據(jù)記錄的方式有()
插入作為一種SQL操作,除了需要正確的命令語法外,還要求插入數(shù)據(jù)必須與數(shù)據(jù)表上的(),否則正確的語法也無法實(shí)現(xiàn)正常的插入操作。
以下分支結(jié)構(gòu)控制語句正確的是()
在以下選項(xiàng)中哪些屬于視圖的特點(diǎn)()
在SQL中,刪除操作有drop、truncate、delete,其中風(fēng)險等級最高的是delete。
MySQL數(shù)據(jù)庫中,通常將用戶寫入對應(yīng)的權(quán)限表來控制訪問權(quán)限的,以下屬于用戶權(quán)限得選項(xiàng)()
批量記錄插入,可以不要求插入數(shù)據(jù)結(jié)構(gòu)匹配,與約束不沖突。
下列關(guān)于用戶權(quán)限說法正確的是()