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Select the statement that best describes The cure for Amplification Principle in the Internetdomain， as explained in RFC 3429 （Internet Architectural Guidelines ）（）？
- A、Amplification is prevented if global changes have only a local effect as opposed to systems in which global changes have a local effect
- B、Amplification is prevented if local changes have only a local effect as opposed to system inwhich localchange have a global effect
- C、Internet domain does not suffer from“The Amplification Principle”as BGP takes care of misbehaving advertisers
- D、None of the above
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更多 “Select the statement that best describes The cure for Amplification Principle in the Internetdomain， as explained in RFC 3429 （Internet Architectural Guidelines ）（）？A、Amplification is prevented if global changes have only a local effect as opposed to systems in which global changes have a local effectB、Amplification is prevented if local changes have only a local effect as opposed to system inwhich localchange have a global effectC、Internet domain does not suffer from“The Amplification Principle”as BGP takes care of misbehaving advertisersD、None of the above” 相关考题
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The user Sue issues this SQL statement:GRANT SELECT ON sue. EMP TO alice WITH GRANT OPTION; The user Alice issues this SQL statement:GRANT SELECT ON sue. EMP TO reena WITH GRANT OPTION; The user Reena issues this SQL statement:GRANT SELECT ON sue. EMP TO timber;The user Sue issues this SQL statement:REVOKE select on sue. EMP FROM alice;For which users does the revoke command revoke SELECT privileges on the SUE.EMP table?（）A. Alice onlyB. Alice and ReenaC. Alice, Reena, and TimberD. Sue, Alice, Reena, and Timber
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In a SELECT statement that includes a WHERE clause, where is the GROUP BY clause placed in the SELECT statement? ()
A. Immediately after the SELECT clauseB. Before the WHERE clauseC. Before the FROM clauseD. After the ORDER BY clauseE. After the WHERE clause
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Evaluate this SQL statement:In the statement, which capabilities of a SELECT statement are performed?()
A. Selection, projection, joinB. Difference, projection, joinC. Selection, intersection, joinD. Intersection, projection, joinE. Difference, projection, product
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Exhibit:Examine the data in the EMPLOYEES table.Examine the subquery:SELECT last_nameFROM employeesWHERE salary IN (SELECT MAX(salary)FROM employeesGROUP BY department_id);Which statement is true?()
A. The SELECT statement is syntactically accurate.B. The SELECT statement does not work because there is no HAVING clause.C. The SELECT statement does not work because the column specified in the GROUP BY clause is not in the SELECT list.D. The SELECT statement does not work because the GROUP BY clause should be in the main query and not in the subquery.
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From SQL*Plus, you issue this SELECT statement:You use this statement to retrieve data from a data table for()。
A. UpdatingB. ViewingC. DeletingD. InsertingE. Truncating
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Examine the description of the MARKS table:SUBJ1 and SUBJ2 indicate the marks obtained by a student in two subjects.Examine this SELECT statement based on the MARKS table:What is the result of the SELECT statement?（）A. The statement executes successfully and returns the student ID and sum of all marks for each student who obtained more than the average mark in each subject.B. The statement returns an error at the SELECT clause.C. The statement returns an error at the WHERE clause.D. The statement returns an error at the ORDER BY clause.
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Evaluate this SQL statement:SELECT e.EMPLOYEE_ID,e.LAST_NAME,e.DEPARTMENT_ID, d.DEPARTMENT_NAMEFROM EMPLOYEES e, DEPARTMENTS dWHERE e.DEPARTMENT_ID = d.DEPARTMENT_ID;In the statement, which capabilities of a SELECT statement are performed?（）A.selection, projection, joinB.difference, projection, joinC.selection, intersection, joinD.intersection, projection, joinE.difference, projection, product
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Click the Exhibit button and examine the data in the EMPLOYEES table.Examine the subquery:SELECT last_nameFROM employeesWHERE salary IN (SELECT MAX(salary)FROM employeesGROUP BY department_id);Which statement is true?（）A.The SELECT statement is syntactically accurate.B.The SELECT statement does not work because there is no HAVING clause.C.The SELECT statement does not work because the column specified in the GROUP BY clause is not in the SELECT list.D.The SELECT statement does not work because the GROUP BY clause should be in the main query and not in the subquery.
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What is a sub-select statement?A．a select statement that selects a subset of fields in a tableB．a select statement that returns a subset of the data in a tableC．a select statement that appears within another select statementD．a select statement that returns a subset of the constraints on a field
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In which four clauses can a subquery be used?（）A、in the INTO clause of an INSERT statementB、in the FROM clause of a SELECT statementC、in the GROUP BY clause of a SELECT statementD、in the WHERE clause of a SELECT statementE、in the SET clause of an UPDATE statementF、in the VALUES clause of an INSERT statement
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Which two statements about views are true? （）A、A view can be created as read only.B、A view can be created as a join on two or more tables.C、A view cannot have an ORDER BY clause in the SELECT statement.D、A view cannot be created with a GROUP BY clause in the SELECT statement.E、A view must have aliases defined for the column names in the SELECT statement.
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From SQL*Plus, you issue this SELECT statement: SELECT* FROM order; You use this statement to retrieve data from a data table for （）.A、UpdatingB、ViewingC、DeletingD、InsertingE、Truncating
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Which two statements are true regarding the ORDER BY clause? （）A、It is executed first in the query execution B、It must be the last clause in the SELECT statement C、It cannot be used in a SELECT statement containing a HAVING clauseD、You cannot specify a column name followed by an expression in this clause E、You can specify a combination of numeric positions and column names in this clause
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Where can subqueries be used?（）A、field names in the SELECT statement B、the FROM clause in the SELECT statement C、the HAVING clause in the SELECT statementD、the GROUP BY clause in the SELECT statement E、the WHERE clause in only the SELECT statement F、the WHERE clause in SELECT as well as all DML statements
考题
In a SELECT statement that includes a WHERE clause, where is the GROUP BY clause placed in the SELECT statement?（）A、Immediately after the SELECT clauseB、Before the WHERE clauseC、Before the FROM clauseD、After the ORDER BY clauseE、After the WHERE clause
考题
单选题Evaluate this SQL statement: SELECT e.EMPLOYEE_ID,e.LAST_NAME,e.DEPARTMENT_ID, d.DEPARTMENT_NAME FROM EMP e, DEPARTMENT d WHERE e.DEPARTMENT_ID = d.DEPARTMENT_ID; In the statement, which capabilities of a SELECT statement are performed?（）A
Selection, projection, joinB
Difference, projection, joinC
Selection, intersection, joinD
Intersection, projection, joinE
Difference, projection, product
考题
单选题The user Sue issues this SQL statement: GRANT SELECT ON sue. EMP TO alice WITH GRANT OPTION; The user Alice issues this SQL statement: GRANT SELECT ON sue. EMP TO reena WITH GRANT OPTION; The user Reena issues this SQL statement: GRANT SELECT ON sue. EMP TO timber; The user Sue issues this SQL statement: REVOKE select on sue. EMP FROM alice; For which users does the revoke command revoke SELECT privileges on the SUE.EMP table?（）A
Alice onlyB
Alice and ReenaC
Alice, Reena, and TimberD
Sue, Alice, Reena, and Timber
考题
单选题View the Exhibit and examine the structure of the ORDERS and ORDERJTEMS tables. Evaluate the following SQL statement： SELECT oi.order_id， product_jd， order_date FROM order_items oi JOIN orders o USING （order_id）； Which statement is true regarding the execution of this SQL statement？（）A
The statement would not execute because table aliases are not allowed in the JOIN clause.B
The statement would not execute because the table alias prefix is not used in the USING clause.C
The statement would not execute because all the columns in the SELECT clause are not prefixed with table aliases.D
The statement would not execute because the column part of the USING clause cannot have a qualifier in the SELECT list.
考题
单选题Examine the description of the MARKS table: STD_ID NUMBER(4) STUDENT_NAME VARCHAR2(30) SUBJ1 NUMBER(3) SUBJ2 NUMBER(3) SUBJ1 and SUBJ2 indicate the marks obtained by a student in two subjects. Examine this SELECT statement based on the MARKS table: SELECT subj1+subj2 total_marks, std_id FROM marks WHERE subj1 AVG(subj1) AND subj2 AVG(subj2) ORDER BY total_ marks; What is the result of the SELECT statement?（）A
The statement executes successfully and returns the student ID and sum of all marks for each student who obtained more than the average mark in each subject.B
The statement returns an error at the SELECT clause.C
The statement returns an error at the WHERE clause.D
The statement returns an error at the ORDER BY clause.
考题
单选题Evaluate this SQL statement: SELECT e.EMPLOYEE_ID,e.LAST_NAME,e.DEPARTMENT_ID, d.DEPARTMENT_NAME FROM EMP e, DEPARTMENT d WHERE e.DEPARTMENT_ID = d.DEPARTMENT_ID; In the statement, which capabilities of a SELECT statement are performed?（）A
Selection, projection, joinB
Difference, projection, joinC
Selection, intersection, joinD
Intersection, projection, joinE
Difference, projection, product
考题
多选题Which two statements about views are true?（）AA view can be created as read only.BA view can be created as a join on two or more tables.CA view cannot have an ORDER BY clause in the SELECT statement.DA view cannot be created with a GROUP BY clause in the SELECT statement.EA view must have aliases defined for the column names in the SELECT statement.
考题
多选题In which four clauses can a subquery be used? （）Ain the INTO clause of an INSERT statementBin the FROM clause of a SELECT statementCin the GROUP BY clause of a SELECT statementDin the WHERE clause of a SELECT statementEin the SET clause of an UPDATE statementFin the VALUES clause of an INSERT statement
考题
多选题Which two are true about aggregate functions?（）AYou can use aggregate functions in any clause of a SELECT statement.BYou can use aggregate functions only in the column list of the select clause and in the WHERE clause of a SELECT statement.CYou can mix single row columns with aggregate functions in the column list of a SELECT statement by grouping on the single row columns.DYou can pass column names, expressions, constants, or functions as parameter to an aggregate function.EYou can use aggregate functions on a table, only by grouping the whole table as one single group.FYou cannot group the rows of a table by more than one column while using aggregate functions.
考题
多选题From SQL*Plus, you issue this SELECT statement: SELECT* FROM order; You use this statement to retrieve data from a data table for （）.AUpdatingBViewingCDeletingDInsertingETruncating
考题
单选题In a SELECT statement that includes a WHERE clause, where is the GROUP BY clause placed in the SELECT statement? （）A
Immediately after the SELECT clauseB
Before the WHERE clauseC
Before the FROM clauseD
After the ORDER BY clauseE
After the WHERE clause
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