sql server recover deleted rows

Original address: http://www.cnblogs.com/liuzhendong/archive/2011/10/11/2207361.htmlThese basic concepts are not always understood before, and are now organized as follows:1. District:Zone is the basic unit of administrative space in SQL Server.A zone is eight physically contiguous pages (that is, ten KB), and all pages are stored in a zone, which means that there are 16 extents per megabyte in the SQL

This article focuses on SQL Server 2005 maintenance plans that cannot be removed (SQL Server maintnance plan can not delete), and the following is full text: A database to change the IP and host name, only the database instance modified, forget to maintain the plan to remove the IP and host name after the restart, mai

Original: SQL Server queries all table names and rows of dataQuery all indicateSelectfromwhere xtype='u'select* from sys.tablesQuerying all table names and rows in the databaseSELECTA.name as [TABLE NAME], B.rows as [RECORD COUNT] fromsysobjects asaINNER JOINsysindexes asB ona.ID=b.idWHERE(A.type= 'u' ) and(B.

SQL Server deduplication is one of our most common actions, and here's a look at six different ways SQL Server can remove duplicate rows for your reference.1. If there is an ID field, it is a unique fielddelect table TableName where ID not in (the Select Max (ID) from the ta

Recovering deleted data from deleteA chance I saw the recovery of SQL Server deleted data by mistake BlogThe original address is: http://www.cnblogs.com/lyhabc/p/3683147.htmlI was very curious to see the next, and then is confused, completely do not understand. I'm not actually going toThis blog post to understand, sin

. We'll use the Common Table Expression (CTE) and put the ' self ' Join query in it.With duplicates as (select distinct A.custid as customer_id from Customers2 a join customers2 B on A.custid Let ' s check which rows got deleted.SELECT * from Customers2 goScenario 2.b:delete all duplicate records but keep the first original oneLet ' s first truncate the CUSTOMERS2 table and add the same rows again.Truncate

Tags: SQL Server database RemovalToday to help test students to solve the database can not delete the problem, the process is as follows:1, delete the database is, the database into single-user mode, and can not be deleted, such as:650) this.width=650; "title=" 1.png "alt=" wkiol1qbvzsg5tmfaaa9iihiksg014.jpg "src=" http://s3.51cto.com/wyfs02/M00/ 49/d6/wkiol1qbvz

Original article: http://support.microsoft.com/kb/139444/SummaryThe Microsoft SQL Server table should not contain duplicate rows and non-unique primary keys. For the sake of conciseness, we sometimes refer to the primary key as "key" or "Pk" in this article, but this always indicates "primary key ". Repeated PK violates entity integrity and is not allowed in the

Tags: SQL Server  In recent days, the company's technical maintenance staff frequently let me recover the database, because they are always missing the where condition, resulting in update, delete has unrecoverable consequences, plus those libraries are dozens of G. It takes about more than 10 minutes to recover. To

Quick Method for counting the number of rows in each table in SQL Server This article mainly introduces how to calculate the number of rows in each table in SQL Server. This article does not use the traditional count () function b