rollback

Because the version of MySQL is more and is acquired by Oracle Company, all a lot of friends are not very clear about the difference of each version, here is a simple introduction, easy to need friend one, each version of the common command

Introduction: An effective and robust transaction strategy is critical for maintaining data consistency and integrity. API Layer transaction policies are easy to implement and are ideal for most business applications. The author of the Transaction

MySQL is a semi commercial database that is popular with people in the Linux community. MySQL is available to run on most Linux platforms (I386,SPARC,ETC), as well as a few non-Linux or even non-UNIX platforms. 1. License fee MySQL's popularity

server| Microsoft Blocking definition =============== Blocking occurs when the first connection from the application controls the lock and the second connection requires a conflicting lock type. The result is to force the second connection to wait

The garden has a very good article about SQL Server transaction isolation, feeling a lot of the introduction from the concept, for those beginners, see the touch of understanding is profound, so no longer repeat, the emphasis is on the example

The origin of 11.4.1 affairs When you update a database with the delete command or the update command, you can only manipulate one table at a time, which can cause data inconsistencies in the database. For example: The enterprise cancels the

Oracle ----"Rollback useSql> CREATE table TBL (name VARCHAR2 (10)); Table created. sql> INSERT into TBL values (' Zhiqiao '); 1 row created. Sql> select * from TBL; NAME----------Zhiqiao sql> Delete tbl; 1 row deleted. Sql> select * from TBL; No

Undo_management=manual When a new database is created, Oracle establishes a default system fallback segment in the system tablespace. The system fallback segment should only be used for fallback records that hold Oracle system transactions, and no

Stored Procedure | encryption | decryption Actually for the paste j9988+ original BEGIN TRANSACTION--playyuer Original exec sp_decrypt ' appsp_test '--j9988 original Rollback TRANSACTION--playyuer Original Or: Or simply wrap the j9988 in

Database mirroring is the movement of database transactions from one database to another in a different environment. A mirrored copy is an alternate copy that cannot be accessed directly, and is used only in the case of error recovery. Oracle

Oracle|unix|window Ian Adam, SAIC Ltd David Stien,saic LTD Translation: Fenng Partii Database Startup and shutdown The database can be opened on Windows 2000 by starting the associated service. Through the service options of the Control Panel

oracle| temporary table | speed | optimization 1. Preface At present, all use Oracle as database support platform application, most of the data volume of the system, that is, table data volume is generally in millions above data volume. Of course it'

Although the green Resource network is not recommended to use the command to delete things in the database table, but these delete commands are always useful places. When it comes to deleting a table's data, the most important thing you can

Summary Atomic transaction processing is a widely known technique for ensuring consistency in the event of a failure. The ACID properties of atomic transactions ensure that state consistency is maintained in even complex business applications,

Finally put OCP DBA's course all finished, tired Ah! Overall Oracle certification is worth the test. I have CCNP, MCSE certificate, but through the DBA examination, feel not only deepened the understanding of modern databases, but also enrich the

Finally decided to get the mail system again. Because the server often problems, DNS error, SMTP also often problems. Most importantly, because there were only two servers previously, this server acted on several roles (Pdc,isaserver,exchange

Control author of the February Microsoft Community Star Microsoft Community Star In programming, you often need to use transactions. A business is a series of operations that must be successful, and all other steps must be undone as long as one

Data | database 1. Invoke instanceString prm1,prm2,prm3;ResultSet Rst=null;Prm1 = ...;Prm2 = ...;PRM3 = ...;Querybean.setconnection ("Sun.jdbc.odbc.JdbcOdbcDriver", "JDBC:ODBC: Data Source name", "sa", ""); try{ string[] param = {PRM1,PRM2,PRM3};/*

1. Introduction to Basic table space A. system table space Main storage data dictionary and Internal system table base table To view the SQL of the Data data dictionary SELECT * FROM Dict To view the SQL for an internal system table SELECT *

Statspack 10 items that must be viewed in the output result 1, load between files (load profile) 2, instance efficiency click Rate (Instance efficiency hit ratios) 3, the first 5 waiting events (Top 5) 4, Waiting for events (wait event) 5.