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什么是字段（field）？
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为“工资”表增加一个“实发工资”字段的正确命令是A．MODIFY TABLE 工资 ADD COLUMN 实发工资 N（9,2）B．MODIFY TABLE 工资 ADD FIELD 实发工资 N（9,2）C．ALTER TABLE 工资 ADD COLUMN 实发工资 N（9,2）D．ALTER TABLE 工资 ADD FIELD 实发工资 N（9,2）
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为“工资”表增加一个“实发工资”字段的正确命今是A)MODIFY TABLE I N ADD COLUMN实发工资N(9,2)B)MODIFY TABLE工资ADD FIELD实发工资N(9,2)C)ALTER TABLE工资ADD COLUMN实发工资N(9,2)D) ALTER TABLE工资ADD FIELD实发工资N(9,2)
考题
现有员工工资表(PAYMENT)，其字段包含如下：员工号(EmployeeID)C(10)，基本工资(BaseFee)N (8．2)，津贴(SubsidyFee)N(8．2)，奖金(AwardFee)N(8．2)，保险扣除(’InsuranceFee)N(8．2)。现要求为“工资”表增加一个“实发工资”字段(RealFee)，类型为数值型，正确SQL命令是（ ）。A. ALTER TABLE PAYMENT ADD COLUMN RealFee N(8，2)B. ALTER TABLE PAYMENT ADD FIELD RealFee N(8，2)C. MODIFY TABLE PAYMENT ADD COLUMN Re,Fee N(S，2)D. MODIFY TABLE PAYMENT ADD FIELD RealFee N(8，2)
考题
为“选课”表增加一个“等级”字段，其类型为C、宽度为2，正确的SQL命令是( )。A．ALTER TABLE选课ADD FIELD等级C(2)B．ALTER TABLE选课ALTER FIELD等级C(2)C．ALTER TABLE选课ADD等级C(2)D．ALTER TABLE选课ALTER等级C(2)
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Calendar类中,用于为指定的日历字段增加或减去指定的时间量的方法是?()
A.int get(int field)B.void add(int field,int amount)C.void set(int field,int value)D.void set(int year,int month,int date)
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在EI Villege高级检索平台中ky字段表示什么意思？（）A、表示keyword字段B、表示Subject字段C、表示Controlled term字段D、表示同时检索Subject/Title/Abstract字段
考题
为了保护隐私数据，对数据元素进行替换的方法是（）。A、数据标记化Data TokenizationB、字段级加密Field level encryptionC、行级数加密Row level encryptionD、批量数据哈希Batch hash
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如果要创建一张仅包含一个字段的表rb，其字段名为rb，字段类型为字符型，字段宽度为20，则可以用下列的（）命令创建。A、CREATE TABLE rb rb C（20）B、CREATE TABLE rb（rbC（20））C、CREATE TABLE rb FIELD rb C（20）D、CREATE TABLE rb FIELD（rb C（20））
考题
设有一个表rsda，该表有一个名为zc的字段。如果要把字段名zc改为zhicheng，可以使用下列命令（）A、ALTER TABLE rsda RENAME COLUMN zc TO zhichengB、ALTER TABLE rsda RENAME FIELD zc TO zhichengC、ALTER TABLE rsda COLUMN RENAME zc TO zhichengD、ALTER TABLE rsda FIELD zc RENAME TO zhicheng
考题
jim has created a field hint for the address field. Users tell him this text disappears when they click in the address field. which one of the following is most likely reason?（）A、 the address field is computed B、 jim should have used a text popup C、 jim stored the field hint in the database D、 field hint only display when the user has not clicked in the field （field hint）
考题
单选题jim has created a field hint for the address field. Users tell him this text disappears when they click in the address field. which one of the following is most likely reason?（）A
the address field is computed B
jim should have used a text popup C
jim stored the field hint in the database D
field hint only display when the user has not clicked in the field （field hint）
考题
单选题Adam Smith was a professor of philosophy, a commissioner of customs, and founded the field of modern economics.A
a commissioner of customs, and founded the field of modem economicsB
worked as commissioner of customs, and founded the field of modern economicsC
a commissioner of customs, and the founder of the field of modern economicsD
commissioned customs, and was the founder of the field of modern economicsE
a commissioner of customs, and was the founder of the field of modem economics
考题
单选题为了保护隐私数据，对数据元素进行替换的方法是（）。A
数据标记化Data TokenizationB
字段级加密Field level encryptionC
行级数加密Row level encryptionD
批量数据哈希Batch hash
考题
单选题The most common type of AC service generator found aboard ship is the stationary （）.A
electromagnetic field, revolving armature typeB
electromagnetic field, oscillatory armature typeC
armature, oscillatory electromagnet field typeD
armature, rotating electromagnetic field type
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