advanced features of oracle pl sql

... tường minh? Cursor ngầm là một địa chỉ không đặt tên của một lệnh SQL được xử lý bởi Oracle và/hay cơ chế thực thi PL/ SQL. Mọi lệnh SQL đều thực hiện trong một cursor ngầm, bao gồm các lệnh update, ... dụng hay không. Trả về là TRUE hay FALSE 4. Có bao nhiêu loại vòng lặp trong PL/ SQL? Các kiểu vòng lặp có sẵn trong PL/ SQl là: • Lệnh loop-exit. • Lệnh while-loop. • Lệnh for-loop. 5. Phân biệt ... minh, developer có toàn quyền điều khiển trên sự thực hiện lệnh. DECLARE CURSOR employee_cursor IS SELECT * FROM employee; ...

Ngày tải lên: 22/08/2012, 09:51

... 11 2.2. SQL* PLUS, CÔNG CỤ TƯƠNG TÁC LỆNH SQL VỚI DATABASE 11 2.2.1. Câu lệnh tương tác của SQL* Plus .11 2.2.2. Phân nhóm câu lệnh trong SQL* Plus 12 2.2.3. Chi tiết các lệnh SQL* Plus cơ ... sách này được upload tại: hutonline.net Oracle cơ bản - SQL và PL/ SQL ký từ tính từ trái sang LTRIM(char1, n [,char2]) NLS_INITCAP(char) REPLACE(char,search_string[,replacem ent_string]) ... này được upload tại: hutonline.net Oracle cơ bản - SQL và PL/ SQL MỤC LỤC MỤC LỤC 1 CHƯƠNG 1. GIỚI THIỆU CHUNG 5 1.1. NGÔN NGỮ SQL 5 1.1.1. Lịch sử phát triển của ngôn ngữ SQL .5 ...

Ngày tải lên: 31/08/2012, 16:46

... Quyển sách này được upload tại: hutonline.net Oracle cơ bản - SQL và PL/ SQL Chương 1. GIỚI THIỆU CHUNG 1.1.NGÔN NGỮ SQL 1.1.1. Lịch sử phát triển của ngôn ngữ SQL Mô hình cơ sở dữ ... Trang 4 Quyển sách này được upload tại: hutonline.net Oracle cơ bản - SQL và PL/ SQL Primary Key nhất thiết phải có số liệu. Foreign Key Là một column ... unit Tập hợp các câu lệnh thực hiện được viết bởi ngôn ngữ SQL và PL/ SQL, bao gồm Procedure, function, package 1.2.3. Các nhóm lệnh SQL cơ bản Tên lệnh SELECT INSERT UPDATE DELETE Diễn...

Ngày tải lên: 29/09/2013, 05:20

... between client and server PL/ SQL programs. Prior to PL/ SQL Release 2.3, you would have had to fetch all data from the cursor, store it in PL/ SQL variables (perhaps a PL/ SQL table), and then pass ... independent of any host language. Because the focus of this book is on standalone PL/ SQL development, I present cursor variables as a PL/ SQL Release 2.3 enhancement. If you do have PL/ SQL Release ... name Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. When the test for termination takes place After each execution of the loop body, PL/ SQL checks the value of the...

Ngày tải lên: 17/10/2013, 22:15

... constants, etc.). In PL/ SQL, the select list of a SELECT may contain PL/ SQL variables, expressions, and even functions (PL/ SQL Release 2.1 and above). Please purchase PDF Split-Merge on www.verypdf.com ... the most recently executed SQL statement by examining the values in the implicit SQL cursor attributes, as explained later in this chapter. PL/ SQL employs an implicit cursor for each UPDATE, ... Previous: 6.3 Implicit and Explicit Cursors Oracle PL/ SQL Programming, 2nd Edition Next: 6.5 Opening Cursors 6.3 Implicit and Explicit Cursors Book Index 6.5 Opening Cursors The Oracle Library...

Ngày tải lên: 20/10/2013, 17:15

... 6.2.1 Types of Cursors You have lots of options in PL/ SQL for executing SQL, and all of them occur as some type of cursor. Generally, there are two types of SQL that you can execute in PL/ SQL: static ... this is not actually a PL/ SQL table, but a type of table. Here are some examples: TYPE emp_names_tabtype IS TABLE OF ; TYPE dates_tabtype IS TABLE OF ; PL/ SQL table A PL/ SQL table is declared ... possible in PL/ SQL only through the use of the DBMS _SQL built-in package (see Appendix C, Built-In Packages). All other forms of SQL executed inside a PL/ SQL program represent static SQL; these...

Ngày tải lên: 20/10/2013, 17:15

... with PL/ SQL 71 72 1.4 PL/ SQL Versions 72 1.4.1 Working with Multiple Versions of PL/ SQL 72 1.4.2 How This Book Handles Different Versions of PL/ SQL 73 1.4.3 PL/ SQL Version 2.0 73 1.4.4 PL/ SQL ... Introduction to PL/ SQL 66 1.1 What Is PL/ SQL? 66 68 1.2 The Concept of Programming in Oracle Applications 68 70 1.3 The Origins of PL/ SQL 70 1.3.1 Improved Application Portability with PL/ SQL 70 1.3.2 ... Clearing the PL/ SQL Table 374 376 10.8 PL/ SQL Table Enhancements in PL/ SQL Release 2.3 376 10.8.1 PL/ SQL Tables of Records 377 10.8.2 PL/ SQL Table Built−ins 379 383 10.9 Working with PL/ SQL Tables...

Ngày tải lên: 23/10/2013, 15:15

... how often PL/ SQL is performing conversions on your behalf. Figure 4.1 shows what kinds of implicit conversions PL/ SQL can perform. Figure 4.1: Implicit conversions performed by PL/ SQL Please ... remainder of the datatypes in the numeric category are all subtypes of NUMBER. They are provided in ORACLE& apos;s SQL and in PL/ SQL in order to offer compatibility with ANSI SQL, SQL/ DS, and ... NULL value of the company_name variable when it is instantiated. Previous: 4.3 NULLs in PL/ SQL Oracle PL/ SQL Programming, 2nd Edition Next: 4.5 Anchored Declarations 4.3 NULLs in PL/ SQL Book...

Ngày tải lên: 24/10/2013, 15:15

... physical design of your programs. The block structure is at the core of two key concepts and features of the PL/ SQL language: Modularization The PL/ SQL block is the basic unit of work from which ... Formatting PL/ SQL Blocks Oracle PL/ SQL Programming, 2nd Edition Next: 3.6 Using Comments Effectively 3.4 Formatting PL/ SQL Blocks Book Index 3.6 Using Comments Effectively The Oracle Library ... Block Structure PL/ SQL is a block-structured language. Each of the basic programming units you write to build your application is (or should be) a logical unit of work. The PL/ SQL block allows...

Ngày tải lên: 24/10/2013, 15:15

... two versions of PL/ SQL: ● PL/ SQL Release 1.1: a client-side PL/ SQL engine that allows the application to execute local PL/ SQL programs ● PL/ SQL Release 2.X: the server-based PL/ SQL engine ... 1.2 The Concept of Programming in Oracle Applications Chapter 1 Introduction to PL/ SQL Next: 1.4 PL/ SQL Versions 1.3 The Origins of PL/ SQL Oracle has a history of leading the software industry ... strange planet. So read on! Previous: 1.6 A Few of My Favorite (PL/ SQL) Things Oracle PL/ SQL Programming, 2nd Edition Next: 2. PL/ SQL Language Fundamentals 1.6 A Few of My Favorite (PL/ SQL) ...

Ngày tải lên: 28/10/2013, 22:15

... coverage of the PL/ SQL language over the life of this language. The first edition of this book covered most of PL/ SQL& apos;s features as it existed through PL/ SQL Release 2.3. With the release of Oracle8 , ... challenge: how do we fit all the new technologies of PL/ SQL8 into Oracle PL/ SQL Programming and fill out coverage of existing elements of PL/ SQL without creating a tome so unwieldy that reading ... rushing off to learn Java? Because even with all of the hoopla over Java, PL/ SQL is still the best way to build programs to access data in Oracle7 and Oracle8 databases. After Oracle began using PL/ SQL...

Ngày tải lên: 28/10/2013, 22:15

... of a PL/ SQL Table Clearing the PL/ SQL Table PL/ SQL Table Enhancements in PL/ SQL Release 2.3 Working with PL/ SQL Tables A PL/ SQL table is a one-dimensional, unbounded, sparse collection of homogeneous ... Table 10.3 PL/ SQL Tables and DML Statements Tables are PL/ SQL constructs. PL/ SQL is a linguistic extension of the Oracle SQL language, but it is distinct from SQL. When PL/ SQL executes a SQL DML ... Tables Contents: PL/ SQL Tables and Other Collections Characteristics of PL/ SQL Tables PL/ SQL Tables and DML Statements Declaring a PL/ SQL Table Referencing and Modifying PL/ SQL Table Rows Filling the Rows of...

Ngày tải lên: 07/11/2013, 19:15

... Previous: 10.7 Clearing the PL/ SQL Table Chapter 10 PL/ SQL Tables Next: 10.9 Working with PL/ SQL Tables 10.8 PL/ SQL Table Enhancements in PL/ SQL Release 2.3 PL/ SQL Release 2.3 offers significantly ... in PL/ SQL Release 2.3 Oracle PL/ SQL Programming, 2nd Edition Next: III. Built-In Functions 10.8 PL/ SQL Table Enhancements in PL/ SQL Release 2.3 Book Index III. Built-In Functions The Oracle ... New operations on PL/ SQL tables. PL/ SQL Release 2.3 offers a set of new built-in functions and procedures which return information about, or modify the contents of, a PL/ SQL table. These operations...

Ngày tải lên: 07/11/2013, 19:15

... padded_length number of characters from the left (start of the string) and then simply returns that substring of the incoming value. ● Place the phrase "sell!" in front of the names of selected ... the set of characters to be translated (if found), and replace_set is the set of characters which will be placed in the string. Unlike REPLACE, where the last argument could be left off, you ... day in the month, PL/ SQL always returns the last day in the resulting month, regardless of the number of actual days in each of the months. This quirk can cause problems. I offer a solution...

Ngày tải lên: 07/11/2013, 19:15

... PL/ SQL? Oracle SQL and PL/ SQL are evolving languages that constitute the backbone of applications written for the Oracle environment. Every version of the Oracle database expands the features of ... for writing large, complex programs that must interact with an Oracle database. The difference between SQL and PL/ SQL SQL and PL/ SQL are completely different languages. SQL is a limited language that ... addition to SQL* Plus and newly born Oracle SQL Developer, a number of other tools enable you to work with PL/ SQL. The reason for using any one of these is to make your life easier. Of course,...

Ngày tải lên: 13/12/2013, 03:15

Ngày tải lên: 13/12/2013, 03:15

Ngày tải lên: 15/12/2013, 04:15

Ngày tải lên: 15/12/2013, 04:15

Ngày tải lên: 15/12/2013, 04:15

Ngày tải lên: 15/12/2013, 04:15