Oracle PL/SQL by Example (4th Edition) by Benjamin Rosenzweig

By Benjamin Rosenzweig

This booklet is a comic story. web page 1 of bankruptcy 1 states "In addition, PL/SQL can be utilized to advance functions for browsers resembling Netscape" - Netscape? web page nine states "The choose assertion within the previous instance is supported by means of a number of models of Oracle. even if, beginning with Oracle 9i, the recent ANSI 1999 SQL regular is supported besides" - the recent ANSI 1999 commonplace? the single updating that i may see was once a number of pages within the creation. not just has the e-book no longer been up-to-date, the ebook is filled with typos and error that most likely have existed because the first variation. The examples do not believe the reasons of the examples. I needed to maintain working the code to determine which used to be right. SQL Developer is neglected (as it didn't exist while the single attempt was once positioned into this booklet ten years ago). The authors have been too lazy to actually replace the e-book so that they simply slapped a brand new hide on it and referred to as it up to date. notice the dates at the different experiences. Do your self a desire and don't waste your cash in this ebook.

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Extra info for Oracle PL/SQL by Example (4th Edition)

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1 PL/SQL in Client/Server Architecture LAB OBJECTIVES After completing this lab, you will be able to . Use PL/SQL anonymous blocks . Understand how PL/SQL gets executed Many Oracle applications are built using client/server architecture. The Oracle database resides on the server. The program that makes requests against this database resides on the client machine. This program can be written in C, Java, or PL/SQL. Because PL/SQL is just like any other programming language, it has syntax and rules that determine how programming statements work together.

Valid dates for DATE variables are January 1, 4712 BC to December 31, 9999 AD. When stored in a database column, date values include the time of day in seconds since midnight. The date portion defaults to the first day of the current month; the time portion defaults to midnight. Dates are actually stored in binary format and are displayed according to the default format. TIMESTAMP . This datatype is an extension of the DATE datatype. It stores fixed-length date values with a precision down to a fraction of a second, with up to nine places after the decimal (the default is six).

Would you receive an error message? If so, what would it say? ANSWER: In this example, you declare a variable called exception. Next, you initialize this variable and display its value on the screen. This example illustrates an invalid use of reserved words. To the PL/SQL compiler,“exception” is a reserved word that denotes the beginning of the exception-handling section. As a result, it cannot be used to name a variable. 1 27 ORA-06550: line 2, column 4: PLS-00103: Encountered the symbol "EXCEPTION" when expecting one of the following: begin function package pragma procedure subtype type use cursor form current The symbol "begin was inserted before "EXCEPTION" to continue.

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