how to update millions of records in sql server

SQL Server UPDATE statement is used to update data, the following is a detailed description of the syntax aspects of SQL Server update statements, hoping to give you a better understand

Yesterday found in the program data analysis results are not, after the analysis, the original data is still, the value of the field is cumulative. Heart said, not Ah, is to regenerate records before the analysis of AH. Did you forget to delete it? Check the code, found that there are DELETE statements. Then execute in Query Analyzer, error. Try again and again, understand, Delete from does not recognize table name alias! Thinking back, the original p

transaction in the first connection completes, because the update lock for the SQL connection considers that the update lock in the first transaction might modify the data, so it must be executed before the transaction execution is complete. The update lock becomes an exclusive lock at this time.2. If the

of data in the table or indexed view is the result of the query.INDEX_ID: The index ID of the table or indexed view. If the table has no indexes, there will be a row of index_id=0 records in Sys.dm_db_partition_stats, if there is a clustered index (and only one clustered index in a table), then in Sys.dm_db_partition_ There is a row of index_id=1 records in stats, and the corresponding Index_id=0

', ' SQL Server name '); ' User name '; ' Password ', database name. dbo. Table name) Select *from Local surface --Update the surface Update b Set B. Column a=a. Column A From OPENROWSET (' SQLOLEDB ', ' SQL Server name ')

Source: One reason SQL Server can update subscription data conflictsWhy are updatable subscriptions conflicting?Updatable subscriptions, when the upgrade adds a field, typically increases in the publisher's publication database, and after the table is added, the publication is automatically synchronized to the subscription database (replication schema change =tru

Tags: SQL Server duplicateenvironment : Windows Server 2003 sp2,sql Server 2000, software for managing fixed assets.Failure phenomena:To increase the fixed asset information for two Cisco switches at the same time, the serial number is different because the model is identica

dbo. ClassInfo as CON t.class=c.id where c.id= ' 1 '--where the way to do multiple table updates update t SET T.remark = ' class 02 student ' from dbo. Student as T, dbo. ClassInfo as Cwhere t.class=c.id and c.id= ' 2 '--7, Output view data updated before and after update dbo. Student set stusex= ' female ' OUTPUT inserted.stusex,deleted.stusexwhere stuid= ' 007 '--8, the command after the SET statement in

static void Update (String connstring, DataTable table){SqlConnection conn = new SqlConnection (connstring);SqlCommand COMM = conn. CreateCommand ();Comm.commandtimeout = _commandtimeout;Comm.commandtype = CommandType.Text;SqlDataAdapter adapter = new SqlDataAdapter (comm);SqlCommandBuilder Commandbulider = new SqlCommandBuilder (adapter);Commandbulider.conflictoption = conflictoption.overwritechanges;Try{Conn. Open ();Set the number of processing ba

operation violates one or more constraints. If you ignore this conflict, it should be resolved in other ways. You can log the details of this conflict and then send the log entries to the system administrator.How does a schema prevent conflicts?To make schema changes on a table in a publication that supports updating subscriptions, you must stop all activities on the table at the Publisher and Subscribers, and you must propagate the pending data changes to all nodes before you can make schema c

SQL Server deadlock makes the problem that we often encounter, the deadlock of database operation is unavoidable, this article does not intend to discuss how deadlocks are produced, the focus is to resolve deadlocks. Hopefully it will help you learn about the deadlock in SQL Server.Deadlocks are not unfamiliar to DBAs or database developers, and they can be trigg

To update a binary file in SQL Server using the OleDbCommand object Author Zhu Yi Using the Oledbconnectionoledbcommand in Ado.net makes it easy to update binaries in SQL Server, the following is a detailed code demonstration Demo

Tags: io for ar art CTI on EF C SQLIn SQL Server, trigger, INSERT, UPDATE, delete state:CREATE TRIGGER t_inms_alarmsOn [PHS]. [dbo]. [Alarmcurrent]For INSERT, DELETEAsDECLARE @rows intSELECT @rows = @ @rowcountIF @rows = 0Return--If the table is inserted, synchronize the update alarmsmiddletblIF EXISTS (select 1 from i

meet the current conditionsSET @myDoc. Modify ('Insertif (count (/root/location/step) Then element step {"This is new step"}Else ()As first into (/root/location) [1] ')SELECT @myDoc;2. Update XML DECLARE @myDoc XML SET @myDoc = ' Laborhours= "1.1" Machinehours= ". 2" >manufacturing steps is described here. SELECT @myDoc; --The value of the LaborHours property in the replacement node location is SET @myDoc. Modify (' Replace value of (/roo

structure without data Method Two actually is also good is a method of the MS SQL self-brought first to have a full backup of the database this is more important than the other is relatively simple Back up the thing log and then in the options to back up the log tail with these 2 things basically OK first restore the complete database Select this do not roll back and then restore the things log Choose the time period when the wrong operation was