The transaction is about atomicity. The concept of atomicity means that some things can be viewed as an inseparable unit. From a database point of view, it refers to the smallest combination of one or more statements that should be executed all or not at all.To understand the concept of a transaction, you need to be able to define very clear boundaries. The
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Transaction isolation level is a basic concept in a database. Why is there a transaction isolation level? What transaction isolation levels are implemented on SQL server? The premise of transaction
TRANSACTION END ELSE BEGIN Print 'transaction success, COMMIT transaction, write to hard disk, permanent save' COMMIT TRANSACTION ENDGOPrint 'view balance After a transfer transaction'SELECT * fromBankGO Declare @errorcount int begin Tran Set @errorcount = 0
Atitit. view the nature and principles of pre-compiled SQL question marks and view native SQL statements and atititsql
Atitit. view the nature and principles of pre-compiled SQL question marks and
This articleArticleIs the third article in the series. The addresses of the first two articles are as follows:
Transaction logs in SQL Server (I)-physical and logical architecture of transaction logs
Transaction Log in SQL Ser
Myth #20: After breaking the log backup chain, a full backup is required to restart the log chain
Error
A transaction log backup backs up all transaction logs since the last transaction log
SqlServer modifies the storage location of database files and log files, and SQL server log files
-- View the current storage location select database_id, name, physical_name AS CurrentLocation, state_desc, size from sys. master_files where database_id = db_id (N 'database name'); -- modify the storage location of the
TAGS: LSE value try reverse label inf List Tor backupThe transaction is about atomicity. The concept of atomicity means that some things can be viewed as an inseparable unit. From a database point of view, it refers to the smallest combination of one or more statements that should be executed all or not at all. To understand the concept of a transaction, you need
file is intact)
1. Stop the server SQL Service
2. delete database files (MDF files)
In this case, access to the database testbackup in SSMs will become unavailable:
At this point, because the SQL server instance is available, tail logs are backed up by specifying the no_truncate option in the T-SQL Statement (which must be specified, otherwise tail
The SQL Server replication divides large transactions into small transaction distribution methods.
In SQL server replication, when a large transaction is executed in the published database, for example, 100,000 or more data is operated at a time. After the operation data is executed in the published database, the
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SQL Server transaction log Introduction
The first question: why does the number of Transaction
SQL 2008 log Files account for 23G of hard disk space, and the transaction log has been truncated (Truncate), the actual log content is small, 1G is not, want to release the extra space occupied by the log files.
However, no matt
In SQL Server replication, when 1 large transactions are performed in the publishing database, such as a one-time operation of 100,000 or more million of data. When the operational data is completed at the publication database, the Log Reader Agent scans the transaction log and passes it to the distribution database at
In 11.2, materialized view logs also add features that, for local materialized views, can now be refreshed using the commit SCN instead of the timestamp method in the previous version.
Look at a simple example:
Sql> SELECT * from V$version;
BANNER
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Oracle database11genterprise Edition release11.2.0.1.0-64bit Production
Pl/
13.2 Deployment of log shipping13.2.1 system requirements for deployment log shippingThe deployment of SQL Server 2014 log shipping requires a hardware infrastructure that outlines these system requirements.InternetLog shipping does not necessarily require a Windows domain environment, but the Windows domain environmen
How to correctly use the SQL view and the SQL view in a multi-language ArchitectureProduct Positioning
All products know that the support for multiple languages directly affects product positioning.
If the cycle of a product is one year, you have to add at least three months to fully support multiple languages! The tim
Tags: style blog http io color ar os sp forOriginal: SQL Server transaction nestingExample code:DECLARE @TranCounter INT;SET @TranCounter = @ @TRANCOUNT;IF @TranCounter > 0 --Procedure Called when there is --An active transaction. --Create a savepoint to be able -- to roll back only the work done --In the procedure if there are an --error. SA
Tags: SQL Server 2014 log shipping13.3 Monitoring Log shippingAfter you deploy log shipping, you need to monitor information about the status of the log shipping server. The history and status of log shipping operations are always
The SQL Server user can only access the specified view. The SQL Server View
Use crm-- Create a role for the current databaseExec sp_addrole 'rapp'-- Assign view permission grant select on veiw TO [role]
-- Specify the View listGra
Procedure call (RPC)) service, RPC uses 135 ports to ensure RPC service starts, and if the server has a firewall, 135 ports are not blocked by the fire wall.Use the Telnet IP 135 command to test whether the other port is open to the outside. Port scanning software (such as advanced Port Scanner) can also be used to scan ports to determine whether the ports are open.3. Ensure that the statements in the linked server do not have access to the originating Tran
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