Read e-book online Beginning XML Databases (Wrox Beginning Guides) PDF

By Gavin Powell

ISBN-10: 0471791202

ISBN-13: 9780471791201

* Supported by way of all significant database structures, XML presents a simple, standardized approach to moving facts among databases and to and from the internet, self sufficient of the software program in use* deals database programmers and data-driven net builders specified suggestions on how one can comprehend and paintings with XML as information* a number of hands-on, step by step examples support readers learn how to simplify database paintings utilizing XML* exhibits how one can use XML to replace facts among a number of databases both internally or with exterior consumers and companions* Covers XML in well known databases together with Oracle Database, SQL Server, and short insurance of DB2 Database* Covers uncomplicated syntax for XML, the XML DOM, and XSL – with an emphasis on database use, and local XML databases* extra themes coated comprise local XML databases, XPath, XQuery, XLink, XPointer, DTDs, XML Schemas, between others

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Com BEGIN UPDATE employee SET bonus=bonus+v_bonus WHERE dept_id IN (10,20,30); COMMIT; END; What will be the result? A: A subset of employees will be given a $300 increase in bonus. 114. You have been granted update privileges on the last_name column of the employee table. Which data dictionary view would you query to display the column. The privilege was granted on the schema that owns the employee table? A: ALL_COL_PRIVS_RECD 115. Which alter command would you use to reinstate a disabled primary re constraint?

What should you do after each fetch statement in the PL/SQL block? A: Initialize the loop. com 89. Which statement about using a subquery in the FROM clause is true? A: You eliminate the need to create a new view or table by placing a subquery in the FROM clause. 90. Examine the table instance chart for the patient table. Column name Key type Nulls/Unique FK table FK column Data type Length Id_number PK NN, UU NUM 10 last_name first_name NN NN VARCHAR2 25 VARCHAR2 25 birth_date DATE doctor_id DOCTOR ID_NUMBER NUM 10 You created the patient_id_seq sequence to be used with the patient tables primary key column.

Definition The column must contain a value in each row. Each value must be different in a column in columns. The value must be unique and present. It defines a condition that each row must satisfy. It establishes a relationship between columns. You attempt to create the salary table with this command: 1. 2. 3. 4. 5. 6. 7. CREATE TABLE SALARY. (employee_id NUMBER(9) CONSTRAINT salary_pk PRIMARY KEY, 1995_salary NUMBER(8,2), NUMBER manager_name VARCHAR2(25) CONSTRAINT mgr_name_nn NOT NULL, $ salary_96 NUMBER(8,2)); Which two lines of the statement will return errors?

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Beginning XML Databases (Wrox Beginning Guides) by Gavin Powell

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