Structured Query Language (SQL) employs a variety of different data structures, with tables being one of the most commonly used. However, tables have certain limitations. For instance, you can’t limit users to only have access to part of a table. A user must be granted access to an entir...
“Unable to enlist in the transaction” with Oracle linked server from MS SQL Server [<Name of Missing Index, sysname,>] in non clustered index [Execute SQL Task] Error: The value type (__ComObject) can only be converted to variables of type Object. [ODBC Driver Manager] Data source nam...
Here is an example of retrieving data from database and bound the data to a DataGridView control using Ado.Net.复制 Imports System.Data.OleDb Public Class Form1 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim con As ...
Right-click WebForm1.aspx, and then click View Code to display the code-behind page source. Add the following statements to the top of the code-behind page: using System.Data.SqlClient; using System.IO; using System.Text; In the code-behi...
Carefully look at how the concatenation is constructed to "encapsulate" the value of cell M4 between the last brackets (If you would use CUBEVALUE this would be the same syntax) SC713 As a side note in case you're not aware. GETPIVOTDATA retrieves values thatdisplayon...
To view database object dependenciesIn Object Explorer, connect to an instance of the Database Engine and then expand that instance. Expand Databases, expand the database in which the object exists, and then expand the folder in which the object belongs. For example, if the object is a ...
Then type in the Hostname, Port, Username, and Password (if there is one) for the database you want to connect to. I'm using Rfam's public database as an example. Click Test connection if you're not 100% positive you have the right information. You'll get a pop-up box like...
When you're using parameterized queries, it's a bad idea to use Parameters.AddWithValue. In this case, ADO.NET must guess the data type, and there's a special hazard when using strings and AddWithValue. First of all, the .NET string class is a Unicode string, whereas in T-SQL, a st...
I want to count the number of unique servers for a specified date. e.g. I have this: I want to count the unique number of servers for 1-Feb and the unique number of servers for 2-Feb. The date cells are formatted as dates so although the cell shows 1-Feb, th...
To demonstrate new features in Reporting Services, the AdventureWorks SQL Server database is used. The AdventureWorks database ships with Reporting Services. Prerequisites The following are prerequisites: The Access database (.mdb file) or Access project (.adp file). Microsoft Access 2002 or later....