网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
A SELECT statement can be used to perform these three functions: 1. Choose rows from a table. 2. Choose columns from a table 3. Bring together data that is stored in different tables by creating a link between them. Which set of keywords describes these capabilities? （）
A
difference, projection, join
B
selection, projection, join
C
selection, intersection, join
D
intersection, projection, join
E
difference, projection, product
参考答案
参考解析
解析：
暂无解析
更多 “单选题A SELECT statement can be used to perform these three functions: 1. Choose rows from a table. 2. Choose columns from a table 3. Bring together data that is stored in different tables by creating a link between them. Which set of keywords describes these capabilities? （）A difference, projection, joinB selection, projection, joinC selection, intersection, joinD intersection, projection, joinE difference, projection, product” 相关考题
考题
● （73） statement can perform. a calculation and store the result in a variable so that it can be used later.（73）A. AssignmentB. ControlC. I/OD. Declaration
考题
An （70） statement can perform. a calculation and store the result in a variable sothat it can be used later.（70）A. executableB. inputC. outputD. assignment
考题
An(73)statement can perform. a calculation and store the result in a variable so that it can be used later。A．assignmentB．executableC．inputD．output
考题
A SELECT statement can be used to perform these three functions:1. Choose rows from a table.2. Choose columns from a table3. Bring together data that is stored in different tables by creating a link between them. Which set of keywords describes these capabilities? （）A. difference, projection, joinB. selection, projection, joinC. selection, intersection, joinD. intersection, projection, joinE. difference, projection, product
考题
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
考题
Which NLS parameter can be used to change the default Oracle sort method from binary to linguistic for the SQL SELECT statement?()
A. NLS_LANGB. NLS_COMPC. NLS_SORTD. None of the above
考题
______statement can perform. a calculation and store the result in a variable So that it can be used later．A．AssignmentB．ControlC．I/OD．DeclarationA．B．C．D．
考题
l An (5) statement can perform. a calculation and store the result in a variable so that it can be used later.A. executableB.inputC.outputD. assignment
考题
An ______ statement can perform. a calculation and store the result in a variable so that it can be used later.A．executableB．inputC．outputD．assignment
考题
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
考题
Which NLS parameter can be used to change the default Oracle sort method from binary to linguistic for the SQL SELECT statement?（）A、NLS_LANGB、NLS_COMPC、NLS_SORTD、None of the above
考题
A SELECT statement can be used to perform these three functions: 1. Choose rows from a table. 2. Choose columns from a table 3. Bring together data that is stored in different tables by creating a link between them. Which set of keywords describes these capabilities?（）A、difference, projection, joinB、selection, projection, joinC、selection, intersection, joinD、intersection, projection, joinE、difference, projection, product
考题
Which three are true?（）A、A MERGE statement is used to merge the data of one table with data from another.B、A MERGE statement replaces the data of one table with that of another.C、A MERGE statement can be used to insert new rows into a table.D、A MERGE statement can be used to update existing rows in a table.
考题
Evaluate the SQL statement:TRUNCATE TABLE DEPT;Which three are true about the SQL statement? （）A、It releases the storage space used by the table.B、It does not release the storage space used by the table.C、You can roll back the deletion of rows after the statement executes.D、You can NOT roll back the deletion of rows after the statement executes.E、An attempt to use DESCRIBE on the DEPT table after the TRUNCATE statement executes will display an error.F、You must be the owner of the table or have DELETE ANY TABLE system privileges to truncate the DEPT table
考题
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
考题
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
Which two statements about subqueries are true? （）A、A subquery should retrieve only one row.B、A subquery can retrieve zero or more rows.C、A subquery can be used only in SQL query statements.D、Subqueries CANNOT be nested by more than two levels.E、A subquery CANNOT be used in an SQL query statement that uses group functions.F、When a subquery is used with an inequality comparison operator in the outer SQL statement, the column list in the SELECT clause of the subquery should contain only one column.
考题
多选题Evaluate the SQL statement: TRUNCATE TABLE DEPT;Which three are true about the SQL statement? （）AIt releases the storage space used by the table.BIt does not release the storage space used by the table.CYou can roll back the deletion of rows after the statement executes.DYou can NOT roll back the deletion of rows after the statement executes.EAn attempt to use DESCRIBE on the DEPT table after the TRUNCATE statement executes will display an error.FYou must be the owner of the table or have DELETE ANY TABLE system privileges to truncate the DEPT table.
考题
多选题Which two statements are true regarding the ORDER BY clause? （）AIt is executed first in the query executionBIt must be the last clause in the SELECT statementCIt cannot be used in a SELECT statement containing a HAVING clauseDYou cannot specify a column name followed by an expression in this clauseEYou can specify a combination of numeric positions and column names in this clause
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 three are true?（）AA MERGE statement is used to merge the data of one table with data from another.BA MERGE statement replaces the data of one table with that of another.CA MERGE statement can be used to insert new rows into a table.DA MERGE statement can be used to update existing rows in a table.
考题
多选题Which two statements about subqueries are true? （）AA subquery should retrieve only one row.BA subquery can retrieve zero or more rows.CA subquery can be used only in SQL query statements.DSubqueries CANNOT be nested by more than two levels.EA subquery CANNOT be used in an SQL query statement that uses group functions.FWhen a subquery is used with an inequality comparison operator in the outer SQL statement, the column list in the SELECT clause of the subquery should contain only one column.
考题
单选题Which NLS parameter can be used to change the default Oracle sort method from binary to linguistic for the SQL SELECT statement?（）A
NLS_LANGB
NLS_COMPC
NLS_SORTD
None of the above
考题
单选题A SELECT statement can be used to perform these three functions: 1.Choose rows from a table. 2.Choose columns from a table. 3.Bring together data that is stored in different tables by creating a link between them. Which set of keywords describes these capabilities?（）A
difference, projection, joinB
selection, projection, joinC
selection, intersection, joinD
intersection, projection, joinE
difference, projection, product
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
单选题Which NLS parameter can be used to change the default Oracle sort method from binary to linguistic for the SQL SELECT statement？（）A
NLS_LANGB
NLS_COMPC
NLS_SORTD
None of the above
热门标签
最新试卷
