Oracle-Testking-Ocp 1z0-007-Oracle 9i Intro To Plsql-v2 0 by PDF

В данной книге описана программа MySQL версии 3.23 — самый последний стабиль
ный выпуск, доступный на момент написания книги. Сначала излагаются основы
MySQL: запросы, модели баз данных, вопросы нормализации и организации много
пользовательской работы, а также транзакции. Затем систематически анализируются
все ключевые аспекты программы и демонстрируются эффективные методики взаимо
действия с базами данных MySQL посредством языков С, Java, personal home page, Perl, Python и др.
Внимательно проверенная ведущим разработчиком MySQL Микаэлем Видениу
сом, данная книга дает профессионалам именно то, что они ищут: авторитетное,
подробное, богатое примерами руководство по разработке приложений MySQL кор
поративного уровня.

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E: This query has wrong order of columns to sort: results need to be sorted first by semester, than by grade point average. OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 56-61 Chapter 2: Limiting, Sorting, and Manipulating Return Data QUESTION NO: 41 The ORDERS table has these columns: ORDER_ID CUSTOMER_ID ORDER_TOTAL NUMBER(4) NUMBER(12) NUMBER(10,2) NOT NULL NOT NULL The ORDERS table tracks the Order number, the order total, and the customer to whom the Order belongs. 00 dollars?

A. UPDATE new_employees SET name = (Select last_name|| first_name FROM employees Where employee_id =180) WHERE employee_id =180; B. UPDATE new_employees SET name = (SELECT last_name||first_name FROM employees) WHERE employee_id =180; C. com - 30 - 1z0 -007 FROM employees WHERE employee_id =180) WHERE employee_id =(SELECT employee_id FROM new employees); D. UPDATE new_employees SET name = (SELECT last name|| first_name FROM employees WHERE employee_id= (SELECT employee_id FROM new_employees)) WHERE employee_id =180; Answer: A Explanation: Sub-query in this answer will return one row value, concatenated first and last name for the employee with ID 180, so update will be successful.

Immediately after the SELECT clause Before the WHERE clause Before the FROM clause After the ORDER BY clause After the WHERE clause Answer: E Explanation: The GROUP BY clause can be place only after the WHERE clause, or after FROM clause if there is no the WHERE clause in the statement. Incorrect Answers A: It is not possible to place the GROUP BY clause immediately after the SELECT clause. B: It is not possible to place the GROUP BY clause before the WHERE clause, it can be done only after it.

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