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The JDBC interface provides objects and methods for retrieving metadata about databases, query results, and parameterized statements. A JDBC Connection object provides access to metadata about the database that it represents. Invoking its getMetaData() method returns a DatabaseMetaData object, described in Table 19-22. Each method listed in the table returns a result set, containing information about a type of database entity: tables, columns, primary keys, and so on. The result set can be processed using the normal JDBC query results processing routines. Other metadata access methods provide information about the database product name supported on this connection, its version number, and similar information. Metadata information about query results can also be very useful. A ResultSet object provides a getMetaData method that can be invoked to obtain a description of its query results. The method returns a ResultSetMetaData object, described in Table 19-23. The methods let you determine how many columns there are in the query results, and the name and data type of each column, identified by their ordinal position within the query results. Finally, metadata information about the parameters used in a prepared SQL statement or a prepared call to a stored procedure can also be useful. The PreparedStatement and the CallableStatement objects both provide a getParameterMetaData() method that retrieves this information. The method returns a ParameterMetaData object, described in Table 19-24. Invoking the methods of this object provides information about how many parameters are used in the statement, their data types, whether each parameter is an input, output or input/output parameter, and similar information. asp.net upc-a UPC-A . NET Control - UPC-A barcode generator with free . NET ...
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6 Apr 2005 ... Demonstrates a method to draw UPC-A barcodes using C#. ... NET 2003 - 7.87 Kb. Image 1 for Drawing UPC-A Barcodes with C# ... getTables() getColumns() getPrimaryKeys() getProcedures() getProcedureColumns() Returns result set of table information of tables in database Returns result set of column names and type info, given table name Returns result set of primary key info, given table name Returns result set of stored procedure info Returns result set of info about parameters for a specific stored procedure asp.net upc-a Barcode UPC-A - CodeProject
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The UPC-A Code and the assignment of manufacturer ID numbers is controlled in the ... ASP . NET /Windows Forms/Reporting Services/Compact Framework ... Returns number of query results columns Retrieves name of specified results column Retrieves data type of specified results column JDBC 2.0 and JDBC 3.0 introduced several capabilities that extend the basic database access functionality of JDBC. JDBC data sources, first introduced in JDBC 2.0, provide a higher-level method for finding available drivers and databases and connecting to them. They mask the details of making a connection from the Java application programmer. Basically, a data source is identified with some external directory or catalog that is able ALTER SESSION SET NLS_DATE_FORMAT='MM/DD/YYYY'; getParameterClassName() getParameterCount() getParameterMode() getParameterType() getParameterTypeName() getPrecision() getScale() isNullable() isSigned() Returns name of the class (data type) for specified parameter Returns number of parameters in the statement Returns mode (IN, OUT, INOUT) of parameter Returns SQL data type of specified parameter Returns DBMS data type of specified parameter Returns precision of specified parameter Returns scale of specified parameter Determines whether the specified parameter is nullable Determines whether the specified parameter is a signed number Table 19-24. 19: Alter all date strings This is a more tedious solution that involves editing the SQL statements and changing all dates in MM/DD/YYYY format to DD-MON-RR format. to translate logical entity names into specific details Using a data source, the application programmer can specify a target database by an abstract name, and have the directory in conjunction with the JDBC software handle the details of connections JDBC rowsets are another advanced concept enhanced and extended in the JDBC revisions A rowset extends the concept of a JDBC result set, which you will recall represents a set of query results Beyond the query results themselves, a rowset encapsulates information about the underlying source database, the connection to the database, its user name and password, and so on The rowset retains its identity independent of an active connection to the database Thus, a rowset may exist in a disconnected state, and it can be used to reestablish a connection to the database When connected to the database, the rowset can contain query results like a result set. Here are a few ideas for procuring a Fresnel lens, both second hand and new, cost varies widely: Car reversing lenses are a great source, like those pictured in Figure 8-18, these are often fairly
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