executing commands that modify information in the database

... command that doesn't return a result set from the database. In this section, you'll learn how to use the ExecuteNonQuery() method to execute commands that modify information in the database. ... mySqlDataReader.Close(); } public static void Main() { SqlConnection mySqlConnection = Executing Commands that Modify Information in the Database You can use the ExecuteNonQuery() method of a Command ... Finally, you execute the INSERT statement using the ExecuteNonQuery() method: int numberOfRows = mySqlCommand.ExecuteNonQuery(); The ExecuteNonQuery() method returns an int value that indicates...

Ngày tải lên: 24/10/2013, 08:15

Ngày tải lên: 30/03/2014, 13:20

Ngày tải lên: 04/10/2012, 10:02

Ngày tải lên: 04/10/2012, 10:02

Ngày tải lên: 04/10/2012, 10:02

... DataTable containing the schema from the Orders table in the Northwind sample database. The method CreateTableFromSchema( ) in the sample code is called to create a table in the database from ... a schema in the database for the schema of the DataTable argument. The method builds a DDL statement from the schema information and executes it against the data source specified by the connection ... MessageBoxIcon .Information) ; } private void CreateTableFromSchema(DataTable dt, String connectionString) { // Drop the new table if it is already there. StringBuilder sqlCmd = new StringBuilder(...

Ngày tải lên: 21/01/2014, 11:20

... first mapping them into a domain ontol- ogy, then constructing the matches based on the rela- tionships inherent in that ontology. The iMAP system reformulates schema matching as a search in an often very ... consider again the databases in Figure 2. Suppose we have created the mappings, and have used them to transfer the house listings from database S and an- other database U (not shown in the figure) ... Pottinger & Bernstein 2003). This problem has been studied since the early 1980s. It arises in building a database system that comprises several distinct databases, and in designing the schema...

Ngày tải lên: 19/02/2014, 12:20

... and mine it very deeply, not necessarily discovering every aspect of the domain but requiring that the various aspects be integrated with one another to produce a coherent whole. Even in the ... interfaces (limiting that phrase, for the moment, to mean typed English sentences) to various kinds of information systems. At one end of this spectrum is simple, single database query, in ... THERE STILL IS GOLD IN THE DATABASE MINE Madeleine Bates BBN Laboratories 10 Moulton Street Cambridge, MA 02238 Let me state clearly at the outset that I disagree with the premise that...

Ngày tải lên: 21/02/2014, 20:20

Ngày tải lên: 21/06/2014, 02:20

Ngày tải lên: 07/07/2014, 12:20

Ngày tải lên: 07/07/2014, 12:20

Ngày tải lên: 07/07/2014, 12:20

Ngày tải lên: 07/07/2014, 12:20

... insights regarding productive and unproductive activities in an online world? In the late nineties, online traffic and the total amount of business conducted through the Internet were growing rapidly ... tangible), and the type of electronic 16 labor, and where t is the number of years in business. t is included in the model to control for the maturity of a company. Companies operating in the Internet ... and 0 for physical dot coms. Further, the α ’s and the corresponding levels of inputs in the last four formulations involving the dummy variable apply only to the physical dot coms. 1.5 DATA...

Ngày tải lên: 18/02/2014, 11:20

... for the dynamic nature of the Internet and the information that can be found on it; 3 . The search for information is often limited to a few Internet services, such as the WWW. Finding information ... which information is, and which is not stored in these databases. Combining the stored data to extract valuable information from it (for instance, by discovering interesting patterns in it) ... picture of the size of the Internet, let alone to make an estimation of the amount of information that is available on or through it; • The dynamic nature of the information on Internet: information...

Ngày tải lên: 08/10/2012, 15:22

Ngày tải lên: 05/09/2013, 10:15

... Search engines are domain-independent in the way they treat gathered information and in the way they enable users to search in it 8 . Terms in gathered documents are lifted out of their context, ... search the information on the Internet itself, but the meta- information that has been gathered about it. The result of such a search, is not the meta- information itself, but pointers to the document(s) ... even higher in the future) that the question who is supplying the information has become less important: demand for information is becoming the most important aspect of the information chain. What's...

Ngày tải lên: 26/10/2013, 17:15

... stored in the InfoCubes, the central data containers of BW. For more information, see Business Information Warehouse online documentation. Chapter 7: Overview of Reporting in the Business Information ... of Reporting in the Business Information Warehouse Contents What Is the Business Information Warehouse? 7–2 Business Information Warehouse Architecture: An Overview 7–2 Business Information ... systems include extraction programs that export the data from the extract tables and send it to the Business Information Warehouse in the required format. Business Content in the Business Information...

Ngày tải lên: 11/12/2013, 14:15

... containing an identity column, and then retrieve the new value for that column generated by the database. You can also do additional work in a stored procedure such as inserting a row into ... shown in the earlier section, "Modifying Rows in a DataTable ." Note You'll find a complete program named PushChangesUsingProcedures.cs in the ch11 directory that illustrates the ... use of the methods shown in this section. The listing for this program is omitted from this book for brevity. Creating the Stored Procedures in the Database You'll create the following three...

Ngày tải lên: 14/12/2013, 13:15

... generated by the database when the new row is pushed to the database by the Update() method in step 4. When the Update() method is called, the AddProduct4() stored procedure is run to add the new ... row to the Products table. The database then generates a new ProductID for the row, which is then returned by the AddProduct4() stored procedure. You can then read the new ProductID using myNewDataRow["ProductID"], ... The int returned by the Fill() method is the number of rows retrieved from the database and copied to myDataSet. The myDataSet object now contains a DataTable named Products, which contains...

Ngày tải lên: 14/12/2013, 13:15