c# .net core barcode generator

c# .net core barcode generator

c# .net core barcode generator

c# .net core barcode generator

c# .net core barcode generator,

c# .net core barcode generator,

c# .net core barcode generator,
c# .net core barcode generator,

c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,

c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,

c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,
c# .net core barcode generator,

SQL Server Agent runs as a Windows NT/2000 service. It is designed to run on the system regardless of whether a user is logged in and is responsible for executing scheduled jobs. There are two main options for configuring security for SQL Server Agent. The first is to allow it to run under the local system account. This account has permissions to run jobs on the local machine only; it cannot access other machines on the network. In a single server environment, this option is the easiest to configure. If you want to be able to perform tasks on remote machines, however, you must assign SQL Server Agent a specific Windows NT user account under which it will log in. You can then assign the appropriate permissions to this account within the domain(s) in your environment. To set options for the SQL Server Agent service through Enterprise Manager: 1. Expand the server object for the SQL Server machine on which SQL Server Agent is running. 2. Expand the Management folder, right click the SQL Server Agent item, and select Properties. From the SQL Server Agent Properties dialog box, you can configure the various options for the service on the following tabs: s General In the General tab, you can specify the account that SQL Server Agent will use for running on the system:

Sometimes, it is not possible to associate a fact with a row in a dimension table. This occurs when the dimension value is unknown or invalid, or the relationship is optional. In an ER model, the traditional solution is to store a NULL value in the foreign key column. Unfortunately, the presence of NULL foreign keys in a fact table leads to more analytic complications. Entire fact table rows disappear from query result sets, unless one makes use of outer joins. Employing an outer join causes query results to contain NULLs, even if dimension tables do not. An example of an optional relationship occurs in retail sales. You may have noticed that in some stores the cashier will note when a salesperson has helped you. This information may be used to evaluate salespeople or to compute their compensation. Whatever the reason, some sales have an associated salesperson, while some do not. The star schema in Figure 6-9 accommodates this optionality by allowing the salesrep_key to be NULL. Like the NULL value in a dimension column, this approach will lead to problems when formulating queries. The workaround tactics explored for NULL values in dimension columns will not suffice. Additional workarounds will be required. Notice that there are types of salesreps and that some are managers. Managers may have special flexibility when it comes to pricing, so perhaps someone has asked for a report covering sales in which managers were not involved. A well-meaning developer might mistakenly write a query like this:

SELECT NAME, CITY FROM SALESREPS, OFFICES WHERE REP_OFFICE *= OFFICE NAME ------------Tom Snyder Mary Jones Sam Clark Bob Smith Paul Cruz Dan Roberts Bill Adams Sue Smith Larry Fitch Nancy Angelli CITY -------NULL New York New York Chicago Chicago Chicago Atlanta Los Angeles Los Angeles Denver.

You can either enter a username and password for an existing Windows NT account or use the local system account. SQL Server Agent can also be configured to use a specific mail profile for sending e-mail notifications of jobs (described later in this section). If you have already configured a Messaging Application Programming Interface (MAPI) client for this user, you can enter this name in the box. Examples of MAPI clients include Microsoft Outlook and Outlook Express. To keep a record of all outgoing messages within the mailbox for this user, check the appropriate box. Finally, you can choose the name of the file to which SQL Server Agent will log error messages. You can also specify the name of a server operator who will receive a pop-up message when the error occurs. s Advanced On this tab, you can define the actions SQL Server Agent will take if it crashes:

WHERE salesrep.salesrep_type <> 'Manager' AND salesrep.salesrep_key = sales_facts.salesrep_key AND store.store_key = sales_facts.store_key GROUP BY store.store_name

Note in this case (a left outer join), the "child" table (SALESREPS, the table with the foreign key) is the major table in the outer join, and the "parent" table (OFFICES) is the

6:

Unfortunately, this SQL query will not pick up all sales where a manager was not involved. For fact table rows where there is no salesperson, the join to the salesrep dimension fails altogether; such facts will not be included in the query results. This occurs because the NULL foreign key cannot be matched to a row in the dimension table. The only way to produce the desired results is to employ an outer join. An outer join instructs the DBMS to include rows from one table, even if it is being joined to another table that does not include a corresponding row. If a corresponding row is not found, the database will generate NULL values for its columns in the result set. So, for example, when the fact table in Figure 6-9 is outer-joined to salesrep, the fact table row with a NULL salesrep_key is given a salesrep_name and salesrep_type of NULL. This means that the previously discussed tactics for