A.GROUP BY WHERE HAVING
B.WHE REGROUP BY HAVING
C.WHE REHAVING GROUP BY
D.HAVING WHERE GROUP BY
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A.Select email from student where email!=null
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A.LIMIT
B.TOP
C.COUNT
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A.select top3 cDiscription fromTvtype order by iprice asc
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C.select top3 cDiscription from Tvtype order by iprice desc
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A.select CustomerName,SalesDate from Sales group by CustomerName,SalesDate
B.select CustomerName,SalesDate from Sales order by CustomerName,SalesDate
C.select CustomerName,SalesDate from Sales group by CustomerNameorderbySalesDateDESC
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A.select*intocatt where from kehu
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最新試題
MySQL通過賦予/撤銷某個用戶對某個數(shù)據(jù)庫或某個表的某項權力(讀、寫、更改、刪除等),來保證數(shù)據(jù)安全。
在以下選項中哪些屬于視圖的功能()
視圖的意義:為用戶集中提取數(shù)據(jù)、隱蔽數(shù)據(jù)庫的復雜性,使操作簡便化、增加數(shù)據(jù)的安全性、提高表的邏輯獨立性。
下列關于用戶權限說法正確的是()
在實際應用中,為了防止新建視圖與已存在的視圖重名產(chǎn)生沖突,常用CREATE OR REPLACE VIEW來創(chuàng)建新視圖。
DELETE語句中使用JOIN子句執(zhí)行跨表刪除時,有INNER、LEFT、RIGHT即內(nèi)連接、左連接、右連接等不同的連接方式。
mysql變量有4種類型:局部變量、用戶變量、會話變量和全局變量。
MySQL變量可分為兩大類,即()
MySQL變量可分為兩大類,即用戶變量和系統(tǒng)變量。
在MYSQL中,存儲過程不可以帶有參數(shù)。