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ASP.NET Web PDF Document Viewer/Editor Control LibraryThis ensures that if in the future you change the data type of the empno column to, say, varchar2(30), your PL/SQL code is insulated from such changes. In the same vein, you can intermingle SQL and PL/SQL freely. These are particularly effective because they can be decomposed using succinct patterns in the same way as tuple arguments: let length (Vector3D(dx,dy,dz)) = sqrt(dx*dx+dy*dy+dz*dz) This technique is most useful for record-like values where there is some natural order on the constituent elements of the value (as shown earlier) or where the elements have different types. excel 2007 barcode formula, barcode generator for excel 2010, microsoft excel barcode add in free, how to create barcodes in excel 2013 free, barcode font for excel 2010 free, barcode excel, barcode font for excel free, free barcode add in for excel 2003, free barcode generator excel 2007, microsoft excel 2013 barcode font,Yes, you heard me right. The reason I make this claim is that if you write your code in PL/SQL, you have ensured that Your code can be invoked by any other language that has the ability to connect and talk to Oracle. This includes C, C++, and Java, among other languages. Your code is automatically ported to all operating systems to which Oracle is ported (which include most popular flavors of UNIX and Windows). Those who claim that writing in PL/SQL will tie your code to a database overlook the fact that if you don t exploit a database fully, you re simply not getting your money s worth. If you pursue this strategy, not only does performance suffer but also you ll get code that will give incorrect results when used directly against another database. In most cases, database independence isn t a real requirement. Developing code in a database-independent way by restricting developers to use a subset of common features is analogous to a right-handed swordsman fighting a duel with his left hand odds are that it is a losing fight. In the relatively rare case you do need to write code that works against different databases, your data access layer should be written using the procedural language of the database (e.g., PL/SQL in Oracle, Transact-SQL in SQL Server, and so on). This way you ensure (among other things) that Your code exploits all features of the database and the ones offered by a stored procedure language such as PL/SQL. Your Java code is largely independent of the database (assuming you use the SQL92 syntax of invoking procedures from JDBC). Your code can be accessed by applications written in any other language and from all the tools that know how to invoke a stored procedure. Figure 5-4. The validity of a digitial signature is recomputed at load time Finally, it s important to note that strong names do not prevent evildoers from loading your assembly into ildasm.exe for the purposes of viewing proprietary code. If you wish to limit an evildoer s ability to do so, you ll want to make use of obfuscation software. As you may know, obfuscators essentially scramble the contents of a .NET assembly in such a way that while its intended operation is persevered, the internal CIL code is rendered essentially unreadable. PL/SQL Code Is Compact (Fewer Lines of Code) Multiple types can be declared together to give a mutually recursive collection of types, including record types, discriminated unions, and abbreviations. The type definitions must be separated by the keyword and: Compared to code written in Java (or, for that matter, any other language), if a piece of code involves SQL statements, the PL/SQL version is likely to be much more compact. For example, if you want to write a procedure that fetches all employees who have a given job title from the emp table and do some processing on them, in PL/SQL you can write create or replace procedure process_employees( p_job in varchar2 ) is begin for i in ( select * from emp where job = p_job ) loop dbms_output.put_line( 'processing the record of ' || i.ename ); -- processing code Note Visual Studio 2005 ships with a community edition of Dotfuscator, which as the name implies, is an Summary end loop; end; / show errors; exec process_employees ( 'CLERK' ) Notice how the preceding loop implicitly does cursor management for you, such as opening, fetching, and closing the cursor. Try writing the same code in Java it will require many more lines of code.
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