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【多选题】

What two statements are true regarding the recommendations received from the SQL Access Advisor?（）(Choose two.)

A、It cannot generate recommendations that support multiple workload queries.

B、It can recommend partitioning on tables provided that the workloads have some predicates and joins on the columns of the NUMBER or DATE type.

C、It can recommend partitioning only on tables that have at least 10,000 rows.

D、It can recommend only B-tree indexes and not bitmap or function-based indexes

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更多“What two statements are true regarding the recommendations received from the SQL Access Advisor?（）(Choose two.)”相关的问题
第1题
[单选题] Evaluate these two SQL statements: What is true about them?（）

A、The two statements produce identical results.  B、The second statement returns a syntax error.  C、There is no need to specify DESC because the results are sorted in descending order by default.  D、The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.  

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第2题
[] Evaluate these two SQL statements: SELECT last_name, salary , hire_date FROM EMPLOYEES ORDER BY salary DESC; SELECT last_name, salary, hire_date FROM EMPLOYEES ORDER BY 2 DESC; What is true about them? （） Evaluate these two SQL statements: SELECT last_name, salary , hire_date FROM EMPLOYEES ORDER BY salary DESC; SELECT last_name, salary, hire_date FROM EMPLOYEES ORDER BY 2 DESC; What is true about them? （）

A、A. The two statements produce identical results.  B、B. The second statement returns a syntax error.  C、C. There is no need to specify DESC because the results are sorted in descending order by default.  D、D. The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.  

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第3题
[单选题] Evaluate these two SQL statements:SELECT last_name, salary, hire_dateFROM EMPLOYEES ORDRE BY salary DESC; SELECT last_name, salary, hire_dateFROM EMPOLYEES ORDER BY 2 DESC; What is true about them?（）

A、The two statements produce identical results.  B、The second statement returns a syntax error.  C、There is no need to specify DESC because the results are sorted in descending order by default.  D、The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.  

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第4题
[单选题] Evaluate these two SQL statements: SELECT last_name, salary, hire_dateFROM EMPLOYEES ORDRE BY salary DESC; SELECT last_name, salary, hire_dateFROM EMPOLYEES ORDER BY 2 DESC; What is true about them? （）

A、The two statements produce identical results.  B、The second statement returns a syntax error.  C、There is no need to specify DESC because the results are sorted in descending order by default.  D、The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.  

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第5题
[单选题] Evaluate these two SQL statements: SELECT last_name, salary , hire_date FROM EMPLOYEES ORDER BY salary DESC; SELECT last_name, salary , hire_date FROM EMPLOYEESORDER BY 2 DESC; What is true about them?（）

A、The two statements produce identical results.  B、The second statement returns a syntax error.  C、There is no need to specify DESC because the results are sorted in descending order by default.  D、The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.  

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第6题
[单选题] Evaluate these two SQL statements: SELECT last_name, salary , hire_date FROM EMPLOYEES ORDER BY salary DESC; SELECT last_name, salary , hire_date FROM EMPLOYEES ORDER BY 2 DESC; What is true about them?（）

A、The two statements produce identical results.  B、The second statement returns a syntax error.  C、There is no need to specify DESC because the results are sorted in descending order by default.  D、The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.  

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第7题
[单选题] Evaluate these two SQL statements: SELECT last_name, salary , hire_date FROM EMPLOYEES ORDER BY salary DESC; SELECT last_name, salary, hire_date FROM EMPLOYEES ORDER BY 2 DESC; What is true about them?（）

A、The two statements produce identical results.  B、The second statement returns a syntax error.  C、There is no need to specify DESC because the results are sorted in descending order by default.  D、The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.  

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第8题
[单选题] 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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第9题
[单选题] What is true about joining tables through an equijoin?（）

A、You can join a maximum of two tables through an equijoin.  B、You can join a maximum of two columns through an equijoin.  C、You specify an equijoin condition in the SELECT or FROM clauses of a SELECT statement.  D、To join two tables through an equijoin, the columns in the join condition must be primary key and foreign key columns.  E、You can join n tables (all having single column primary keys) in a SQL statement by specifying a minimum of n-1 join conditions.  

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第10题
[单选题] What is true about joining tables through an equijoin? （）

A、You can join a maximum of two tables through an equijoin.  B、You can join a maximum of two columns through an equijoin.  C、You specify an equijoin condition in the SELECT or FROM clauses of a SELECT statement.  D、To join two tables through an equijoin, the columns in the join condition must be primary key and foreign key columns.  E、You can join n tables (all having single column primary keys) in a SQL statement by specifying a minimum of n-1 join conditions.  

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