判断题Prepared Statement是Statement的子接口,使用Prepared Statement要比使用Statement性能更高。A对B错

判断题
Prepared Statement是Statement的子接口,使用Prepared Statement要比使用Statement性能更高。
A

B


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(ii) Comment on the figures in the statement prepared in (a)(i) above. (4 marks)

(b) Explain the matters that should be considered when planning the nature and scope of the examination ofCusiter Co’s forecast balance sheet and income statement as prepared for the bank. (7 marks)

executeUpdate()不是Statement接口的方法。() 此题为判断题(对,错)。

The income statement is prepared from (). A.the income statement columns of the work sheetB.the adjusted trial balanceC.either the adjusted trial balance or the income statement columns of the work sheetD.both the adjusted trial balance and the income statement columns of the work sheet

Statement是PreparedStatement的父接口。Statement对象用于执行不带参数的简单SQL语句;PreparedStatement对象用于执行预编译SQL语句。() 此题为判断题(对,错)。

You run the SQL Tuning Advisor (STA) to tune a SQL statement that is part of a fixed SQL plan baseline. The STA generates a SQL profile for the SQL statement, which recommends that you accept the profile. Which statement is true when you accept the suggested SQL profile?()A. The tuned plan is not added to the SQL plan baseline.B. The tuned plan is added to the fixed SQL plan baseline as a fixed plan.C. The tuned plan is added to the fixed SQL plan baseline as a nonfixed plan.D. The tuned plan is added to a new nonfixed SQL plan baseline as a nonfixed plan.

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

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.

Examine the structure of the EMPLOYEES and DEPARTMENTS tables:Evaluate this SQL statement:Which SQL statement is equivalent to the above SQL statement?() A.B.C.D.

Evaluate the set of SQL statements:What is true about the set?() A. The DESCRIBE DEPT statement displays the structure of the DEPT table.B. The ROLLBACK statement frees the storage space occupies by the DEPT table.C. The DESCRIBE DEPT statement returns an error ORA-04043: object DEPT does not exist.D. The DESCRIBE DEPT statement displays the structure of the DEPT table only if there is a COMMIT statement introduced before the ROLLBACK statement.

Evaluate the SQL statement:What is the result of the statement?() A. The statement produces an error at line 1.B. The statement produces an error at line 3.C. The statement produces an error at line 6.D. The statement returns the employee name, salary, department ID, and maximum salary earned in the department of the employee for all departments that pay less salary then the maximum salary paid in the company.E. The statement returns the employee name, salary, department ID, and maximum salary earned in the department of the employee for all employees who earn less than the maximum salary in their department.

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

关于PreparedStatement与Statement描述错误的是()。A、一般而言,PreparedStatement比Statement执行效率更高B、PreparedStatement会预编译SQL语句C、Statement每次都会解析/编译SQL,确立并优化数据获取路径D、Statement执行扫描的结果集比PreparedStatement大

Evaluate the set of SQL statements: CREATE TABLE dept (deptno NUMBER(2), dname VARCHAR2(14), loc VARCHAR2(13)); ROLLBACK; DESCRIBE DEPT What is true about the set?()A、The DESCRIBE DEPT statement displays the structure of the DEPT table.B、The ROLLBACK statement frees the storage space occupied by the DEPT table.C、The DESCRIBE DEPT statement returns an error ORA-04043: object DEPT does not exist.D、The DESCRIBE DEPT statement displays the structure of the DEPT table only if there is a COMMIT statement introduced before the ROLLBACK statement.

Statement接口中的execute Query(String sql)方法返回的数据类型是()A、Statement接口实例B、Connection接口实例C、Database Meta Data类的对象D、Result Set类的对象

在JDBC应用程序中,使用Statement接口的()方法,执行查询语句,并可返回结果集。A、execute()B、close()C、executeUpdate()D、executeQuery()

下面对jdbc api描述错误的是()。A、DriverManager接口的getConnection()方法可以建立和数据库的连接B、Connection接口的createStatement()方法可以创建一个Statement对象C、Statement接口的executeQuery()方法可以发送select语句给数据库D、ResultSet接口表示执行insert语句后得到的结果集

cn是Connection对象,创建Statement对象的方法是()。A、Statement st=new Statement()B、Statement st=cn.newStatement()C、Statement st=cn.createNewStatement()D、Statement st=cn.createStatement()

Prepared Statement是Statement的子接口,使用Prepared Statement要比使用Statement性能更高。

以下描述正确的是()。A、CallableStatement是PreparedStatement的父接口B、PreparedStatement是CallableStatement的父接口C、CallableStatement是Statement的子接口D、PreparedStatement是Statement的父接口

Which two statements are true about terms in a routing policy?()A、A then statement is mandatory in a termB、If a term does not contain a from statement, all routers matchC、If a term does not contain a from statement, the Junos OS will not commitD、A then statement is not mandatory in a term

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.

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

单选题Your Oracle10g database contains a table with a TIMESTAMP TO LOCAL TIME ZONE column. There are about two hundred column values for the column. You issued the following statement:   SQL ALTER DATABASE SET TIME_ZONE =’Europe/London’;   What will be the result of issuing the above statement?()A The statement will be executed successfully, and a new time zone will be set for the database.B The statement will be executed successfully, but a new time zone will not be set for the database.C The statement will not be executed successfully because the SET TIME_ZONE clause can be used only with the ALTER SESSION statement.D The statement will not be executed successfully because the ALTER DATABASE SET TIME_ZONE statement is used only when the database contains no table with the TIMESTAMP TO LOCAL TIME ZONE column.

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.

多选题Which two statements are true about terms in a routing policy?()AA then statement is mandatory in a termBIf a term does not contain a from statement, all routers matchCIf a term does not contain a from statement, the Junos OS will not commitDA then statement is not mandatory in a term

单选题You run the SQL Tuning Advisor (STA) to tune a SQL statement that is part of a fixed SQL plan baseline. The STA generates a SQL profile for the SQL statement, which recommends that you accept the profile. Which statement is true when you accept the suggested SQL profile?()AThe tuned plan is not added to the SQL plan baseline.BThe tuned plan is added to the fixed SQL plan baseline as a fixed plan.CThe tuned plan is added to the fixed SQL plan baseline as a nonfixed plan.DThe tuned plan is added to a new nonfixed SQL plan baseline as a nonfixed plan.