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Which iSQL*Plus feature can be used to replace values in the WHERE clause?()
A.substitution variables
B.replacement variables
C.prompt variables
D.instead-of variables
E.This feature cannot be implemented through iSQL*Plus.
参考答案
更多 “ Which iSQL*Plus feature can be used to replace values in the WHERE clause?() A.substitution variablesB.replacement variablesC.prompt variablesD.instead-of variablesE.This feature cannot be implemented through iSQL*Plus. ” 相关考题
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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 are attributes of iSQL*Plus? （）A、iSQL*Plus commands cannot be abbreviated.B、iSQL*Plus commands are accessed from a browser.C、iSQL*Plus commands are used to manipulate data in tables.D、iSQL*Plus commands manipulate table definitions in the database.E、iSQL*Plus is the Oracle proprietary interface for executing SQL statements.
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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 are true regarding the USING clause in table joins?（）A、It can be used to join a maximum of three tables B、It can be used to restrict the number of columns used in a NATURAL join C、It can be used to access data from tables through equijoins as well as nonequijoins D、It can be used to join tables that have columns with the same name and compatible data types
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Which two statements about subqueries are true? （）A、A single row subquery can retrieve data from only one table.B、A SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.C、A SQL query statement can display data from table B that is referred to in its subquery, without including table B in its own FROM clause.D、A single row subquery can retrieve data from more than one table.E、A single row subquery cannot be used in a condition where the LIKE operator is used for comparison.F、A multiple-row subquery cannot be used in a condition where the LIKE operator is used for comparison.
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Which two statements are true about WHERE and HAVING clauses? （）A、A WHERE clause can be used to restrict both rows and groups.B、A WHERE clause can be used to restrict rows only.C、A HAVING clause can be used to restrict both rows and groups.D、A HAVING clause can be used to restrict groups only.E、A WHERE clause CANNOT be used in a query if the query uses a HAVING clause.F、A HAVING clause CANNOT be used in subqueries.
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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
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Which two statements are true regarding the USING and ON clauses in table joins?（）A、Both USING and ON clauses can be used for equijoins and nonequijoins B、Amaximum of one pair of columns can be joined between two tables using the ON clause C、The ON clause can be used to join tables on columns that have different names but compatible data types D、The WHERE clause can be used to apply additional conditions in SELECT statements containing the ON or the USING clause
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多选题Where can subqueries be used?（）Afield names in the SELECT statementBthe FROM clause in the SELECT statementCthe HAVING clause in the SELECT statementDthe GROUP BY clause in the SELECT statementEthe WHERE clause in only the SELECT statementFthe WHERE clause in SELECT as well as all DML statements
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单选题Which /SQL*Plus feature can be used to replace values in the WHERE clause?（）A
Substitution variablesB
Replacement variablesC
Prompt variablesD
Instead-of variablesE
This feature cannot be implemented through /SQL*Plus
考题
多选题Which two statements are true regarding the USING and ON clauses in table joins?（）ABoth USING and ON clauses can be used for equijoins and nonequijoinsBAmaximum of one pair of columns can be joined between two tables using the ON clauseCThe ON clause can be used to join tables on columns that have different names but compatible data typesDThe WHERE clause can be used to apply additional conditions in SELECT statements containing the ON or the USING clause
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单选题Which of the following constraint types can be used to ensure the value of an INTEGER column references only positive values?（）A
UniqueB
CheckC
ReferentialD
Informational
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多选题Which two statements are true regarding the USING clause in table joins?（）AIt can be used to join a maximum of three tablesBIt can be used to restrict the number of columns used in a NATURAL joinCIt can be used to access data from tables through equijoins as well as nonequijoinsDIt can be used to join tables that have columns with the same name and compatible data types
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多选题Which two are attributes of iSQL*Plus? （）A/SQL*Plus commands cannot be abbreviated.B/SQL*Plus commands are accessed from a browser.C/SQL*Plus commands are used to manipulate data in tables.D/SQL*Plus commands manipulate table definitions in the database.E/SQL*Plus is the Oracle proprietary interface for executing SQL statements.
考题
单选题Which iSQL*Plus feature can be used to replace values in the WHERE clause?（）A
substitution variablesB
replacement variablesC
prompt variablesD
instead-of variablesE
This feature cannot be implemented through iSQL*Plus.
考题
多选题Which two statements about subqueries are true? （）AA single row subquery can retrieve data from only one table.BA SQL query statement cannot display data from table B that is referred to in its subquery, unless table B is included in the main query's FROM clause.CA SQL query statement can display data from table B that is referred to in its subquery, without including table B in its own FROM clause.DA single row subquery can retrieve data from more than one table.EA single row subquery cannot be used in a condition where the LIKE operator is used for comparison.FA multiple-row subquery cannot be used in a condition where the LIKE operator is used for comparison.
考题
多选题Which two are attributes of iSQL*Plus? （）AiSQL*Plus commands cannot be abbreviated.BiSQL*Plus commands are accessed from a browser.CiSQL*Plus commands are used to manipulate data in tables.DiSQL*Plus commands manipulate table definitions in the database.EiSQL*Plus is the Oracle proprietary interface for executing SQL statements.
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
单选题Which /SQL*Plus feature can be used to replace values in the WHERE clause?（）A
Substitution variablesB
Replacement variablesC
Prompt variablesD
Instead-of variablesE
This feature cannot be implemented through /SQL*Plus.
考题
多选题Which two statements are true regarding subqueries? （）AA subquery can retrieve zero or more rowsBOnly two subqueries can be placed atone levelCA subquery can be used only in SQL query statementsDA subquery can appear on either side of a comparison operatorEThere is no limit on the number of subquery levels in the WHERE clause of a SELECT statement
考题
多选题Which two statements are true about WHERE and HAVING clauses? （）AA WHERE clause can be used to restrict both rows and groups.BA WHERE clause can be used to restrict rows only.CA HAVING clause can be used to restrict both rows and groups.DA HAVING clause can be used to restrict groups only.EA WHERE clause CANNOT be used in a query of the query uses a HAVING clause.FA HAVING clause CANNOT be used in subqueries.
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