sql server compare 2 tables for differences

Because of accidental operation, in Enterprise Manager mistakenly deleted the database table, then mistakenly deleted the table data what to do?A lot of people's usual practice is to recover from the log first, if the recovery from the log is not possible from the MDF file itself.The first thing to do when you delete data by mistake is to detach the database, stop the database service, and then copy the MDF and LDF.Recover data from MDF files applied to the customer database a few years ago, but

table [Table name] Drop constraint name Create Default ValueAlter table [Table name] add constraint default name: Default \ '51windows. Net \ 'for [field name] Delete default valueAlter table [Table name] Drop constraint default name Delete logs in SQL Server to reduce the size of database filesDump transaction database name with no_logBackup log database name with no_logDBCC shrinkdatabase (database name)

)-----ntext; varbinary (max)----image. With large-value data types, it is much more flexible to manipulate large-value data than before. For example: Before the text is not "like", with varchar (max) After the problem, because varchar (max) in the Behavior and varchar (n) The same, so can be used in Varcahr can be used in the varchar (max On In addition, this also supports the use of AFTER triggers on column references to large-value data types in the inserted and deleted

uncommitted transactions, or committed but not completed transactions, based on which the instance is automatically restored. So far, the SQL Server database has no instance restoration concept.Media recovery is mainly used to damage database files caused by media faults. When a database file, or some content in a file, or a bad disk partition occurs, or the database is damaged by viruses, data is lost, an

Explorer and query analyzer. No installation is required.I strongly recommend this and use it myself. Dbtools Manager Http://www.dbtools.com.br/ Multi-Database Manager in the free version and SQLite Aqua data Studio Http://www.aquafold.com/ There is a lot of functionality that supports a lot of database software, you can use JDBC or ODBC to support SQLite query. There is also SQLite administrator, and later I found that the Firefox plug-in (Addons) SQLite manager is also

free, and cross-platform, on the contrary, how much would it cost to use Asp+mssql? The paging difference is different when the SQL statement gets the total number of records.Select COUNT (*) from Guestbook; MssqlSelect name from note; Mysql MySQL is an open source database, smaller, but functional and fast. Much better than access. SQL Server,mssql is also i

You are working on a program for importing an Excel file from a SQL Server database. To read the columns in the database information, looking for a lot of information from the Internet, and finally summed up the more ideal SQL statements, after the execution of the returned columns are: Table name, column name, column type, column length, column description, whet

You are working on a program for importing an Excel file from a SQL Server database. To read the columns in the database information, looking for a lot of information from the Internet, and finally summed up the more ideal SQL statements, after the execution of the returned columns are: Table name, column name, column type, column length, column description, whet

Oracle and Microsoft are two major database products in the history of database development. This leaves little room for selection of databases, either Microsoft or Oracle. However, there is a big difference between them. Today, I will talk about the three small differences between them that I have to pay attention to when selecting databases. Understanding these differences can provide great guidance for d

In the process of program development, sometimes you need to directly input data testing programs in the database. If you enter Chinese characters directly in a table in the Microsoft SQL Server database, you may not be able to enter Chinese characters, This seems to be a small BUG. It has been tested several times, and there are several situations below. 1. if you define a field in the table as INT or B

. The inner join feature is to display only records that meet the join criteria, as in the previous statement, the query results show only records that are classid equal in the Student and class tables. For example, if the ClassID field for a student record is empty, the link will not show the student record because the corresponding ClassID is not found in the class table. The Connection is not the same, with a left outer join as an example (a righ

Label:Decimal (numeric) synonymous for precise storage of numeric values float and real cannot store values accurately The decimal data type can store up to 38 digits, and all numbers can be placed to the right of the decimal point. The decimal data type stores an accurate (precise) representation of the number, and does not store the approximate value of the value. The two characteristics of a column, variable, and parameter that define a decimal are as follows: p The sum of the digi

Microsoft SQL server, Error 2, SQL server When I started learning about databases in my sophomore year, I installed the database at the beginning. As a result, the first lab class of the database taught us how to install the database on our own machine. We also needed lab r

Tags: example complete arch ble log htm col archive printTransferred from: http://www.cnblogs.com/micheng11/archive/2008/07/08/1237905.htmlThere are two ways to assign values to variables that are already defined in SQL Server, SET and SELECT, respectively.The differences between these two approaches are explained in more detail in

Label:In simple terms, the difference between update and alter, such as Right-click Properties Update Everymatchinfo SET matchno=111--Updating permissions ALTER TABLE EVERYMATCHINFO add IDD INT--Change permissions The actual is the difference between DDL and DML, with some brief instructions DML (Data Manipulation language) is the language of the manipulation: they are select, UPDATE, INSERT, DELETE, just like its name, these 4 commands are the languages used to manipulate the data in the da

development of testing, select the development version, the deployment of the Enterprise version. and the general choice of Express version can meet the common needs. 3. Download and installChinese version [2]: Version 32 of SQL Server R2 Version 64 of SQL Server R2 The sa

same as the primary key! Both can connect the table and define the rules!The primary key, which must be available in each table, is unique and uniquely identifies each record.Foreign key, the foreign key in one table can only be the primary key in the other table, in general, to delete the primary key in a table must first ensure that there is no same foreign key in the other table (that is, the primary key in the table does not have a foreign key associated with it)Indexes only speed up querie

Http://cwbboy.cnblogs.com/archive/2006/03/22/356017.html You can access a database on the. net platform in the following ways:1. OleDB database access program,2. ODBC Database Access Program,3. proprietary database access programs. For example, when accessing SQL Server 2000, we generally like to use proprietary SQL

You can access a database on the. NET platform in the following ways: 1. oledb database access program, 2. ODBC Database Access Program, 3. proprietary database access programs. For example, when accessing SQL Server 2000, we generally like to use proprietary SQL Server. NET

, then the problem comes out. All varchar fields are garbled when they are stored in Chinese (shown as??). ）． And generally you don't know this because you're using the wrong data type to store the resulting, you'll try to install the Chinese font, try to set the operating system's language environment ... None of this solves the problem, and the only solution is to nvarchar (or nchar) the type of database field. More familiar with the project management of friends should know, to the deployment