rdlc code 39

rdlc code 39

rdlc code 39

rdlc code 39

rdlc code 39

rdlc code 39,
rdlc code 39,

rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,

rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,

rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,
rdlc code 39,

The underlying object is also needed when you need to update the user s data because each storage module will have a different method for updating data In our SneakyCat application, we want to record the last time a user posted an idea, so we use the $c->user->get_object() method to get a DBIx::Class object for the user You can see this in the whisper action in lib/SneakyCat/Controller/Ideaspm: # in the Ideas Controller sub whisper :Local :Args(0) { my ( $self, $c ) = @_; # .. ## Now we update the user - first we get the underlying DBIx::Class object ## then we set the value and save it my $user = $c->user->get_object(); $user->last_whisper($current_time); $user->update(); # .. }.

For example, imagine that you are trying to insert a row via a view based on a UNION in which underlying base table should the DBMS insert that row The Oracle documentation provides all of the details and rules with regard to view updatability Most rules and exceptions are rather straightforward, and as noted earlier, most Oracle error messages clearly indicate the reason why certain data manipulation commands are forbidden The data dictionary offers a helpful view to find out which of your view columns are updatable: the USER_UPDATABLE_COLUMNS view For example, Listing 10-14 shows that you cannot do much with the DESCRIPTION column of the CRS_OFFERINGS view This is because it is based on a column from the COURSES table, which is a not a key-preserved table in this view Listing 10-14.

Selecting the Report Writer option opens a Report Writer dialog (see Figure 10-9), which displays three options: Report Writer Wizard (to guide you through creating a report), Report Writer (to create a report directly from a report design mode, bypassing the wizard), and Open existing report (to open a previously saved report profile).

As we mentioned before, it s a good idea to use $c->user->get() where possible, as it is guaranteed to remain compatible with future changes you may make to your application. After you ve worked with authenticated users for a while, however, you will likely find yourself accessing the underlying object fairly often. Thankfully, there is a slightly shorter version of the get_object method: $c->user->obj. Because it is so much shorter, you are likely to see the extra variable creation avoided in favor of calling it directly. Using the $c->user->obj method, the preceding example looks like this: sub whisper :Local :Args(0) { my ( $self, $c ) = @_;

View Column Updatability Information from the Data Dictionary SQL> 2 3 4 select , from where column_name updatable, insertable, deletable user_updatable_columns table_name = 'CRS_OFFERINGS'; UPD --YES NO YES INS --YES NO YES DEL --YES NO YES.

In a chapter about views, it s worth mentioning that PL/SQL (the standard procedural programming language for Oracle databases) provides a way to make any view updatable. With PL/SQL, you can define instead-of triggers on your views. These triggers take over control as soon as any data manipulation commands are executed against the view. This means that you can make any view updatable, if you choose, by writing some procedural PL/SQL code. Obviously, it is your sole responsibility to make sure that those instead-of triggers do the right things to your database to maintain data consistency and integrity. Instead-of triggers should not be your first thought to solve data manipulation issues with views. However, they may solve your problems in some special cases, or they may allow you to implement a very specific application behavior.

The Report Writer Wizard guides you through the process of creating reports by means of interactive dialogs. This is usually a good first step in creating a report: you use the wizard to create a profile of a basic report that you can modify further using Concordance s report designer environment. The wizard has ten different interactive dialogs, described in the following sections.

# ... $c->user->obj->last_whisper($current_time); $c->user->obj->update(); # ... } This example is a bit more succinct than the previous option, but just a bit. Ultimately, the two samples provide identical functionality, so it s really a matter of personal preference.

If data manipulation is allowed via a certain view, there are two rather curious situations that deserve attention: You change rows with an UPDATE command against the view, and then the rows don t show up in the view anymore. You add rows with an INSERT command against the view; however, the rows don t show up when you query the view.