A.elect * From Emp Where HirDate>='1981-1-1' And HirDate <='1981-12-31'
B.Select * From Emp Where Between In '1981-1-1' And <'1981-12-31'
C.Select * From Emp Where Between In '1981-12-31' And <'1981-1-1'
D.Select * From Emp Where HirDate>='1981-1-1' NOT HirDate <='1981-12-31'
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A.Select * From Emp Where EmpNO In('791','792','793')
B.Select * From Emp Where EmpNO ='791' Or EmpNO='792' OR EmpNO='793'
C.Select * From Emp Where EmpNO >='791' And EmpNO<='793'
D.Select * From Emp Where EmpNO >'791' And EmpNO<'793'
A.Select * From Emp Where EmpNO Not In('791','792','793')
B.Select * From Emp Where EmpNO !='791' AND EmpNO!='792' And EmpNO='793'
C.Select * From Emp Where EmpNO <>'791' AND EmpNO<>792' And EmpNO=<>793'
D.Select * From Emp Where EmpNO =!'791' AND EmpNO =!'792' And EmpNO =!'793'
A.Select * From Emp
B.Select * From Emp Where EmpNO Like '%%'
C.Select * From Emp Where Name = '%%'
D.Select * From Emp Where Name Like '%%'
A.truncate table book
B.delete * from book
C.drop table book
D.delete from book
A.Update grade set score=score+5
B.Update grade set score=score+5 where score>=55 or score <=60
C.Update grade set score=score+5 where score between 55 and 60
D.Update grade set score=score+5 where score >=55 and score <=60
最新試題
在MySQL中,可以使用insert語句向數(shù)據(jù)庫表插入數(shù)據(jù)記錄方式有()
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服務(wù)器通過()來維護(hù)連接的客戶端,其作用域僅限于當(dāng)前連接。
想要實現(xiàn)級聯(lián)刪除必須在數(shù)據(jù)外鍵上設(shè)置“級聯(lián)”的更新或刪除。
在insert語句中可以嵌入子查詢,通過子查詢將來自其他數(shù)據(jù)表的數(shù)據(jù)批量插入到所需的數(shù)據(jù)表中。
正常情況下一般刪除命令都會有帶WHERE子句。
以下關(guān)于級聯(lián)刪除描述正確的是()
在MYSQL中,存儲過程不可以帶有參數(shù)。
不同的用戶合理地分配相應(yīng)權(quán)限,能有效控制不同用戶對不同數(shù)據(jù)的“增刪秘方”權(quán)限,是保護(hù)數(shù)據(jù)的一種有效手段。
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()