Tài liệu Using Expression Columns to Display Calculated Values pptx

... [ Team LiB ] Recipe 3.2 Using Expression Columns to Display Calculated Values Problem You need to display a calculated value for each row in a DataTable and to filter and sort the table ... variables, and constants using System; using System.Configuration; using System.Windows.Forms; using System.Data; using System.Data.SqlClient; // . . . private v...

Ngày tải lên: 21/01/2014, 11:20

... Using Expression Columns to Display Aggregate Values Problem You want to add summary information such as averages, sums, and counts to a table based on related child rows. Solution Use expression ... database and a relation between them. An expression is added to the Order Details table to calculate the extended price for each row. Aggregate values for the tota...

Ngày tải lên: 21/01/2014, 11:20

... Using Stored Procedures to Add, Modify, and Remove Rows from the Database You can get a DataAdapter object to call stored procedures to add, modify, and remove rows ... how to set in a DataAdapter object's InsertCommand, UpdateCommand, and DeleteCommand properties. The ability to call stored procedures using a DataAdapter is a very powerful addition to ... you'll...

Ngày tải lên: 14/12/2013, 13:15

... mySqlDataAdapter.Update() is called to push the new row to the database. The AddProduct4() stored procedure is run to add the new row to the Products table, and the RowState of myNewDataRow changes to Unchanged. ... myDataTable.Rows.Add() is called to add myNewDataRow to myDataTable. This causes the RowState of myNewDataRow to change to Added, which indicates myNewDataRo...

Ngày tải lên: 14/12/2013, 13:15

... DataTable dtOrders = new DataTable("Orders"); da.FillSchema(dtOrders, SchemaType.Source); da.Fill(dtOrders); // Create a view and bind it to the grid. dv = new DataView(dtOrders); ... ControlDataEditWithDataViewForm.cs // Namespaces, variables, and constants using System; using System.Configuration; using System.Data; using System.Data.SqlClient; private Data...

Ngày tải lên: 14/12/2013, 18:16

... Type as it is (Automatic Detect). To save your password for future connections, check next to Save Password. Clicking the "OK" button will allow WS_FTP to connect to your web server: The ... right. If you need to delete a file on the web server or your desktop PC, click the file and click the Delete button. To rename a file, click Rename. For more ways to use and cus...

Ngày tải lên: 22/12/2013, 10:16

... of the substitution variable to store the value. message is the message displayed. Introduction to Oracle: SQL and PL/SQL Using Procedure BuilderCĆ28 Using SQL*Plus to Create Reports and Manage ... to represent a value to be passed into a statement. A global variable preceded by a colon (:)is used to pass information out of the PL/SQL block. Input Values From SQL*Plus, input...

Ngày tải lên: 17/01/2014, 09:20

... Boolean expression first == second should be true because both first and second are set to today's date. In fact, only the less than operator and the greater than or equal to operator seem to ... it is reset to 0, otherwise it is incremented using the ++ operator: int seconds; if (seconds == 59) seconds = 0; else seconds++; Boolean Expressions Only Please! The...

Ngày tải lên: 21/01/2014, 15:20

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Ngày tải lên: 14/02/2014, 21:20

... used here to refer to them. Each edoc is converted to a prefix code that’s output. The first table allocates edocs 0 through 255 to the literals, edoc 256 to end-of-block, and edocs 257–285 to lengths. ... quantization, it is still possible to get back a vector very similar to the original d. We first quantize t to the integers (9, 1,−3, 0) and perform the inverse transform to...

Ngày tải lên: 14/12/2013, 15:15