pl sql for better performance

... know SQL before trying to use PL/ SQL This book assumes that you already know SQL If you haven’t mastered SQL, take a good long look at SQL For Dummies, 5th Edition, by Allen G Taylor (Wiley), before ... What makes PL/ SQL unique is its tight integration with SQL It is easier and more natural to embed SQL in PL/ SQL than to so in any other programming language This makes PL/ SQL ideal for writing ... ideal 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...

Ngày tải lên: 13/12/2013, 03:15

... Scoop on SQL and PL/ SQL 16 The purpose of SQL and PL/ SQL 17 The difference between SQL and PL/ SQL 18 What’s new in Oracle SQL and PL/ SQL? 18 What Is PL/ SQL Good For? ... SQL and PL/ SQL ᮣ Discovering what PL/ SQL is good for P L /SQL is an extension to the industry-standard SQL language Oracle Corporation developed PL/ SQL and released the first version in 1991 PL/ SQL ... Oracle PL/ SQL ® FOR DUMmIES ‰ by Michael Rosenblum and Dr Paul Dorsey Oracle PL/ SQL ® FOR DUMmIES ‰ by Michael Rosenblum and Dr Paul Dorsey Oracle® PL/ SQL For Dummies® Published...

Ngày tải lên: 13/12/2013, 03:15

... Scoop on SQL and PL/ SQL 16 The purpose of SQL and PL/ SQL 17 The difference between SQL and PL/ SQL 18 What’s new in Oracle SQL and PL/ SQL? 18 What Is PL/ SQL Good For? ... SQL and PL/ SQL ᮣ Discovering what PL/ SQL is good for P L /SQL is an extension to the industry-standard SQL language Oracle Corporation developed PL/ SQL and released the first version in 1991 PL/ SQL ... What makes PL/ SQL unique is its tight integration with SQL It is easier and more natural to embed SQL in PL/ SQL than to so in any other programming language This makes PL/ SQL ideal for writing...

Ngày tải lên: 27/06/2014, 06:20

... Scoop on SQL and PL/ SQL 16 The purpose of SQL and PL/ SQL 17 The difference between SQL and PL/ SQL 18 What’s new in Oracle SQL and PL/ SQL? 18 What Is PL/ SQL Good For? ... SQL and PL/ SQL ᮣ Discovering what PL/ SQL is good for P L /SQL is an extension to the industry-standard SQL language Oracle Corporation developed PL/ SQL and released the first version in 1991 PL/ SQL ... Oracle PL/ SQL ® FOR DUMmIES ‰ by Michael Rosenblum and Dr Paul Dorsey Oracle PL/ SQL ® FOR DUMmIES ‰ by Michael Rosenblum and Dr Paul Dorsey Oracle® PL/ SQL For Dummies® Published...

Ngày tải lên: 08/08/2014, 20:21

... options: Chapter 2: The PL/ SQL Environment ߜ Toad from Quest Software: Toad is the most popular PL/ SQL coding tool on the market It includes a nice editing environment for SQL and PL/ SQL However, the ... stored procedures You can store PL/ SQL code inside the database (See Chapter for additional information about this topic.) For example, you could store the first PL/ SQL routine from the preceding ... Groundwork: PL/ SQL Fundamentals In This Chapter ᮣ Using PL/ SQL as a programming language ᮣ Understanding lexical program units ᮣ Benefiting from reusable PL/ SQL code ᮣ Discovering PL/ SQL extras P L/SQL...

Ngày tải lên: 08/08/2014, 20:21

... errors SQL> show errors Errors for FUNCTION F_GETDIFF_NR: LINE/COL ERROR -8/3 PL/ SQL: Statement ignored 8/17 PLS-00905: object SCOTT.F_GETAREA_NR is invalid 9/3 PL/ SQL: ... and 15 For now, you need to remember that you can pass variables by reference, even in PL/ SQL Chapter 3: Laying the Groundwork: PL/ SQL Fundamentals In addition to compiler hints in PL/ SQL, you ... execute next PL/ SQL is no different in this regard PL/ SQL supports IF THEN, CASE, and LOOP statements If you’re an experienced programmer, you can probably just skim this chapter for the PL/ SQL- specific...

Ngày tải lên: 08/08/2014, 20:21

... cursors for updates and shortcuts ᮣ Using PL/ SQL functions in SQL T he main reason to use PL/ SQL as a programming language is that it works really well with SQL PL/ SQL works better with SQL than ... cursor to loop through this information is one of the main reasons for using PL/ SQL ߜ How cursors allow PL/ SQL to retrieve information from an Oracle database: PL/ SQL s ability to easily and efficiently ... ways; you can embed SQL in PL/ SQL code, and you can call PL/ SQL functions within SQL structures This chapter shows you how to use both languages together more effectively For example, you find out...

Ngày tải lên: 08/08/2014, 20:21

... access Placing packages for optimal performance Placing code in packages has mixed impacts on performance The first time a package is referenced, the entire package is brought into memory For very ... truths ᮣ Discovering SQL development rules ᮣ Examining PL/ SQL development rules ᮣ Checking out stored PL/ SQL program units T his chapter provides some useful coding standards for PL/ SQL developers ... Toad or SQL Navigator, rather than SQL* Plus, to write code Only recently did Oracle release a sophisticated, user-friendly graphical PL/ SQL development tool called Oracle SQL Developer (formerly...

Ngày tải lên: 08/08/2014, 20:21

... loop; end; / PL/ SQL procedure successfully completed Elapsed: 00:00:01.35 Example 2: SQL> declare v_nr binary_float; begin for i in 1000000 loop v_nr:=sqrt(i); end loop; end; / PL/ SQL procedure ... DBMS_OUTPUT.put_line(to_char(v_dt,v_form_tx)); 10 end; 11 / 12-MAR-2006 19:13:51 ➞12 28-FEB-2003 00:00:00 ➞13 PL/ SQL procedure successfully completed SQL> 239 240 Part IV: PL/ SQL Data Manipulations Here are the details for ... a major performance impact, which is even greater for BINARY_FLOAT Because the number of decimal places for binary datatypes is less than it is for the NUMBER datatype, you might be forced to...

Ngày tải lên: 08/08/2014, 20:21

... to create entirely new types Some user-defined types are for PL/ SQL only, and some can be used in both PL/ SQL and SQL You can create PL/ SQL datatypes in the declaration portions of procedures, ... used in PL/ SQL code (for example, as parameters of functions/procedures), but not in any SQL (views, table definitions, stored datatypes, and so on) A record type can be defined either explicitly ... FOR loop that can spin through the array Inside the loop, you’re accessing array elements by their subscripts This method works in both pure PL/ SQL commands and SQL statements inside the PL/ SQL...

Ngày tải lên: 08/08/2014, 20:21

... it SQL> set serveroutput on SQL> exec p_summary(10); begin p_summary_10; end; PL/ SQL procedure successfully completed Building SQL on the Fly The preceding sections show how dynamic SQL works for ... v_plsql_tx VARCHAR2(2000); begin v_plsql_tx = ‘BEGIN ‘ || ‘ :1 := :1*:2; ‘ || ‘END;’; 10 execute immediate v_plsql_tx 11 using in out a, b; 12 DBMS_OUTPUT.put_line(‘a=’||a); 13 end; 14 / a=6 PL/ SQL ... transaction waits for the trigger to complete before releasing the lock, thus resulting in a deadlock Query audit Some situations require more than simple data modification For example you may need...

Ngày tải lên: 08/08/2014, 20:21

... started programming in PL/ SQL It is not a complete reference There are too many important features in PL/ SQL to discuss in any one book Fortunately, plenty of good PL/ SQL books are available ... operations: You can use SQL bulk operations to replace or modify whole areas of PL/ SQL code When you need to update millions of rows in the database by using PL/ SQL, traditional PL/ SQL coding techniques ... that can be called from PL/ SQL The only time you might encounter this type of requirement is when trying to use PL/ SQL to perform complex bulk mathematical operations for a statistical, financial,...

Ngày tải lên: 08/08/2014, 20:21

... coding standards for capitalization, 211 for comments, 207–210 for constant value, 202–205 for data conversion for dates, 213 for data element, 206 for datatype declarations, 211–213 for global variables, ... standards for, 205–206 naming standards for, 193–194 packaging stored, 217 programming language, PL/ SQL as, 41–42 409 410 Oracle PL/ SQL For Dummies Programming Language/Structured Query Language See PL/ SQL ... 411 412 Oracle PL/ SQL For Dummies SQL (Structured Query Language) See also Native Dynamic SQL coding standards for, 214–217 description of, 17 features of, 19 integration with PL/ SQL, 1, 18, 127–161...

Ngày tải lên: 08/08/2014, 20:21

... Choose Properties ⟶ Choose General tab Click Disk Cleanup Waiting • Disk Cleanup for: C Click All Ok Part Check for viruses and spyware Part Hoovering out the dust ... programs run at startup Part Defragment your hard disk Part Clean up your hard disk Part Check for viruses and spyware Part Hoovering out the dust Part Uninstall unused programs • Windows key...

Ngày tải lên: 09/05/2016, 02:50

... PL/ SQL Environment PL/ SQL engine PL/ SQL block PL/ SQL block PL/ SQL SQL Procedural Statement Executor SQL Statement Executor Oracle Server Hint Draw attention to the fact that PL/ SQL can ... SQL and SQL* Plus Interaction SQL Statements SQL Statements Buffer Server SQL* Plus SQL* Plus Commands Query Results Hint Give an overview of all the uses of the SQL statements Explain SQL as ... Additional Information If time permits, share this information with the class PL/ SQL is the procedural extension to SQL, provided by Oracle Through PL/ SQL, the data manipulation capabilities of SQL are...

Ngày tải lên: 24/01/2014, 10:20

... PMIPv6 performs better than the popular host-based MIPv6 and its extensions in terms of handover performance [11], it still has a long handover delay that is not suitable for time-sensitive applications ... Figure The information elements in the server provide information that is essential for making intelligent handover decisions, such as, general information and access networkspecific information ... attached MNs) and the Information server, a new MAG will immediately get information about MNs attaching to neighboring MAGs including authentication information For example, when an MN is handing...

Ngày tải lên: 21/06/2014, 17:20

... vòng lặp PL/ SQL? Các kiểu vòng lặp có sẵn PL/ SQl là: • Lệnh loop-exit • Lệnh while-loop • Lệnh for- loop Phân biệt trỏ (cursor) ngầm trỏ tường minh? Cursor ngầm đòa không đặt tên lệnh SQL xử lý ... trỏ tường minh? Cursor ngầm đòa không đặt tên lệnh SQL xử lý Oracle và/hay chế thực thi PL/ SQL Mọi lệnh SQL thực cursor ngầm, bao gồm lệnh update, insert, delete lệnh select không thực cursors ... cursor tường minh, developer có toàn quyền điều khiển thực lệnh DECLARE CURSOR employee_cursor IS SELECT * FROM employee; ...

Ngày tải lên: 22/08/2012, 09:51

... phát triển công nghệ - FPT Giáo trình SQL PL/ SQL Đào tạo bản: SQL PL/ SQL Trang 25 Công ty cổ phần đầu t phát triển công nghệ - FPT Giáo trình SQL PL/ SQL LENGTH('SQLCOURSE') LENGTH(DEPTNO) LENGTH(DNAME) ... công nghệ - FPT Giáo trình SQL PL/ SQL Công ty cổ phần đầu t phát triển công nghệ - Fpt Hà Nội, tháng 11 năm 2002 Đào tạo Oracle Giáo trình SQL PL/ SQL Đào tạo bản: SQL PL/ SQL Trang Công ty cổ phần ... cho phép liệu thoả mãn điều kiện Đào tạo bản: SQL PL/ SQL Trang 17 Công ty cổ phần đầu t phát triển công nghệ - FPT Giáo trình SQL PL/ SQL Các toán tử SQL [NOT] BETWEEN x AND y : [Không] lớn x nhỏ...

Ngày tải lên: 23/08/2012, 16:16

... - SQL PL/ SQL Hình vẽ Câu lệnh SQL* Plus Khác biệt lệnh SQL SQL*Plus SQL* Plus SQL Là ngôn ngữ để giao tiếp với Oracle Server việc truy xuất liệu Câu lệnh dựa ký tự chuẩn ASCII Nhận dạng lệnh SQL ... 73 74 74 CHƯƠNG 12 GIỚI THIỆU NGÔN NGỮ PL/ SQL 76 12.1 TỔNG QUAN VỀ PL/ SQL 12.1.1 Cú pháp lệnh PL/ SQL 12.1.2 Khối lệnh PL/ SQL 12.2 LỆNH LẬP TRÌNH PL/ SQL ĐƠN GIẢN 12.2.1 Lệnh IF 12.2.2 Lệnh ... Quyển sách upload tại: hutonline.net Oracle - SQL PL/ SQL Chương CÁC HÀM SQL 4.1.TỔNG QUAN VỀ HÀM SQL 4.1.1 Cấu trúc hàm SQL Hàm SQL đặc điểm làm tăng khả sử dụng câu lệnh SQL Hàm SQL nhận nhiều...

Ngày tải lên: 31/08/2012, 16:46

... vòng lặp PL/ SQL? Các kiểu vòng lặp có sẵn PL/ SQl là: • Lệnh loop-exit • Lệnh while-loop • Lệnh for- loop Phân biệt trỏ (cursor) ngầm trỏ tường minh? Cursor ngầm đòa không đặt tên lệnh SQL xử lý ... trỏ tường minh? Cursor ngầm đòa không đặt tên lệnh SQL xử lý Oracle và/hay chế thực thi PL/ SQL Mọi lệnh SQL thực cursor ngầm, bao gồm lệnh update, insert, delete lệnh select không thực cursors ... cursor tường minh, developer có toàn quyền điều khiển thực lệnh DECLARE CURSOR employee_cursor IS SELECT * FROM employee; ...

Ngày tải lên: 01/09/2012, 09:45