计算机 等考 二级 Access 上机 考试 模拟 试题 四 请在答题菜单下选择相应命令,并按照题目要求完成下面的操作,具体要求如下: 注意:下面出现的考生文件夹均为%USER% 考生文件夹下存在一个数据库文件samp1.mdb,里面已经设计好表对象tStud和tScore,窗体对
计算机等考二级Access上机考试模拟试题四
请在“答题”菜单下选择相应命令,并按照题目要求完成下面的操作,具体要求如下:
注意:下面出现的“考生文件夹”均为%USER%
考生文件夹下存在一个数据库文件“samp1.mdb”,里面已经设计好表对象“tStud”和“tScore”,窗体对象“fTest”和宏对象mTest。并按照以下要求完成操作:
(1)将“tStud”表的“简历”字段的显示宽度设置为40;
(2)建立表“tStud”与表“tScore”之间的关系,两个表通过“学号”建立一对多联系。
(3)将窗体“fTest”中显示标题为“Button1”的命令按钮改为显示“按钮”;
(4)将宏“mTest”删除;
(5)设置“tScore”表的“课程号”字段的输入掩码为只能输入5位数字或字母形式;
(6)将“tStud”表中的“简历”字段隐藏起来。

Mastering the method of adding MySQL users is crucial for database administrators and developers because it ensures the security and access control of the database. 1) Create a new user using the CREATEUSER command, 2) Assign permissions through the GRANT command, 3) Use FLUSHPRIVILEGES to ensure permissions take effect, 4) Regularly audit and clean user accounts to maintain performance and security.

ChooseCHARforfixed-lengthdata,VARCHARforvariable-lengthdata,andTEXTforlargetextfields.1)CHARisefficientforconsistent-lengthdatalikecodes.2)VARCHARsuitsvariable-lengthdatalikenames,balancingflexibilityandperformance.3)TEXTisidealforlargetextslikeartic

Best practices for handling string data types and indexes in MySQL include: 1) Selecting the appropriate string type, such as CHAR for fixed length, VARCHAR for variable length, and TEXT for large text; 2) Be cautious in indexing, avoid over-indexing, and create indexes for common queries; 3) Use prefix indexes and full-text indexes to optimize long string searches; 4) Regularly monitor and optimize indexes to keep indexes small and efficient. Through these methods, we can balance read and write performance and improve database efficiency.

ToaddauserremotelytoMySQL,followthesesteps:1)ConnecttoMySQLasroot,2)Createanewuserwithremoteaccess,3)Grantnecessaryprivileges,and4)Flushprivileges.BecautiousofsecurityrisksbylimitingprivilegesandaccesstospecificIPs,ensuringstrongpasswords,andmonitori

TostorestringsefficientlyinMySQL,choosetherightdatatypebasedonyourneeds:1)UseCHARforfixed-lengthstringslikecountrycodes.2)UseVARCHARforvariable-lengthstringslikenames.3)UseTEXTforlong-formtextcontent.4)UseBLOBforbinarydatalikeimages.Considerstorageov

When selecting MySQL's BLOB and TEXT data types, BLOB is suitable for storing binary data, and TEXT is suitable for storing text data. 1) BLOB is suitable for binary data such as pictures and audio, 2) TEXT is suitable for text data such as articles and comments. When choosing, data properties and performance optimization must be considered.

No,youshouldnotusetherootuserinMySQLforyourproduct.Instead,createspecificuserswithlimitedprivilegestoenhancesecurityandperformance:1)Createanewuserwithastrongpassword,2)Grantonlynecessarypermissionstothisuser,3)Regularlyreviewandupdateuserpermissions

MySQLstringdatatypesshouldbechosenbasedondatacharacteristicsandusecases:1)UseCHARforfixed-lengthstringslikecountrycodes.2)UseVARCHARforvariable-lengthstringslikenames.3)UseBINARYorVARBINARYforbinarydatalikecryptographickeys.4)UseBLOBorTEXTforlargeuns


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