... connect toaSQLServerdatabase */ using System; using System.Data; using System.Data.SqlClient; class MySqlConnection { public static void Main() { // formulate a string containing the details of ... // database connection string connectionString = "server= localhost ;database= Northwind;uid=sa;pwd=sa"; // create a SqlConnection object to connect to the // database, passing the connection string ... SQLServer and use those credentials to connect to the database This saves you from providing a separate username and password toSQLServer You can use integrated security in your program by...
... InfoMessage event fires when the database returns a warning or information message produced by the database You use the InfoMessage event to monitor these messages To get the message, you read ... the SqlInfoMessageEventArgs object You can produce information and error messages using the SQLServer PRINT or RAISERROR statements, which are described in Chapter 4, "Introduction to TransactSQL ... using System; using System.Data; using System.Data.SqlClient; class InfoMessage { // define the InfoMessageHandler() method to handle the // InfoMessage event public static void InfoMessageHandler(...
... the DataAdapter and CommandBuilder SqlDataAdapter da = new SqlDataAdapter(cmd); SqlCommandBuilder cb = new SqlCommandBuilder(da); // Fill table using the DataAdapter DataTable dt = new DataTable( ... changing data being read by a user and preventing users from reading data being changed by a user Locks are acquired and released by user actions; they are managed internally by database software ... locking as a transaction with an isolation level of REPEATABLE READ SERIALIZABLE Use the same locking as a transaction with an isolation level of SERIALIZABLE Table 6-22 SQLServer locking hints...
... the DataAdapter and CommandBuilder SqlDataAdapter da = new SqlDataAdapter(cmd); SqlCommandBuilder cb = new SqlCommandBuilder(da); // Fill table using the DataAdapter DataTable dt = new DataTable( ... changing data being read by a user and preventing users from reading data being changed by a user Locks are acquired and released by user actions; they are managed internally by database software ... locking as a transaction with an isolation level of REPEATABLE READ SERIALIZABLE Use the same locking as a transaction with an isolation level of SERIALIZABLE Table 6-22 SQLServer locking hints...
... "database" chọn "New Database" hình vẽ sau: Sau việc đánh tên database click OK Ngoài dùng SQL script để tạo database Khi ta phải rõ vị trí primary data file transaction log file Ví dụ: USE master ... thông tin database object (table, view ) hay data type Sp_helpdb [ 'database' ] Cung cấp thông tin database cụ thể Sp_monitor Cho biết độ bận rộn SQLServer Sp_spaceused ['object', 'updateusage' ... Visual Basic 6.0 Authors AuthID First Name Last Name A1 John Brown A2 Matthew Bortniker A3 Rick Johnson A4 Peter Wright A5 James Moon AuthorBook BookID AuthID A1 A2 A3 A4 A5 A1 Ngoài điều quan...
... tạo User Database Chúng ta tạo database dễ dàng dùng SQLServer Enterprise cách right-click lên "database" chọn "New Database" hình vẽ sau: Sau việc đánh tên database click OK Ngoài dùng SQL script ... SQLServer Transaction log file SQLServer dùng để ghi lại thay đổi xảy database Quá trình diễn sau: có thay đổi data Insert, Update, Delete yêu cầu từ ứng dụng, SQLServer tải (load) data page ... tạo database Khi ta phải rõ vị trí primary data file transaction log file Ví dụ: USE master GO CREATE DATABASE Products ON ( NAME = prods_dat, FILENAME = 'c:\program files\microsoft SQL server\ mssql\data\prods.mdf',...
... secured database while the actual permissions are stored in the database file When you connect toa secured Jet database, the user ID and password are validated [ Team LiB ] against the values in ... string attributes in addition to those defined by ADO .NET To open adatabase secured by Microsoft Access user-level security, use the Jet OLEDB:System Database attribute in the connection string ... Microsoft Access user-level security requires an additional file—the workgroup information or MDW file in addition to the database or MDB file This file contains the user and group information for...
... installed instance of SQLServer Client tools such as Enterprise Manager and Query Analyzer are also shared The System.Data.SqlClient class cannot automatically discover the port number of a named instance ... plus an instance name The format is \ This format is used in the connection string to specify the Data Source attribute for a named instance Each instance operates independently ... other instances installed on the same computer Each instance has its own set of system and user databases that are not shared between instances and it runs within its own security context The maximum...
... Interface and log onto the system Navigate toDatabase > Connection and add a new database handler for Microsoft SQLServer Click Save to add the database handler to the configuration Navigate toDatabase ... follows: a different sql file for each database required login information when connectingto the databasesql scripts Each of the database types has asql file that you need to: Modify to point to ... of the MySQL database machine) Port: (default MySQL port) Database: (left blank / database is created via the opn_mysql .sql script) How to create a Microsoft SQLServerdatabase for the...
... result.ToString( ); } Discussion A Microsoft Access database password requires that users enter a password to obtain access to the database and database objects This is also known as share-level ... ADO .NET To open adatabase secured by a Microsoft Access database password, use the Jet OLEDB :Database Password attribute in the connection string to specify the password This corresponds to the OLE ... A password does not allow groups or users to have distinct levels of access or permissions Anyone with the password has unrestricted access to the database The Set Database command from the Tools...