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public void UpdateContactTableByDataSet(DataSet ds,string strTblName) { try { SqlDataAdapter myAdapter = new SqlDataAdapter(); SqlConnection　 conn = new SqlConnection(strConnection); SqlCommand myCommand = new SqlCommand("select * from

Performance Summary client/server application logic design is reasonable, directly affect the client/server mode application system processing performance. Based on Oracle 7 server, this paper proposes some methods to determine how to divide the

Sometimes the database hangs up, the library will be ORA-00704 error, and the root cause of the ORA-00704 error is access to obj$, Oracle needs to roll back the data in the paragraph, and access to the rollback segment when the need for the undo

The example in this article describes how Android determines whether software is first run. Share to everyone for your reference. Specifically as follows: ? 1 2 3 4 5 6 7 8 9 10 11-12 Sharedpreferences sharedpreferences =

Fetching across Commits:where is the Source of the Problem? by Boris Milrud Fetching across commits is a common and accepted practice in the Oracle programming world. However, it is isn't an ansi-supported operation. According to the ANSI standard,

Class one or four isolation level The SQL standard defines 4 classes of isolation, including specific rules that define which changes are visible inside and outside the transaction and which are not. The low-level isolation level generally supports

Distributed transactions are transactions that occur between multiple databases, and in Oracle, transactions are handled in a dblink manner, and distributed transactions are much more complex than stand-alone transactions. Most relational databases

Oracle No setting required to immediately recognize all changes to a row In the Oracle9i Database, we saw that it introduced a "time Machine" in the form of a flashback query. This feature allows the DBA to see the column value at a specific time,

· If the top tool for UNIX or Windows Task Manager shows that the CPU usage of your database workload is less than 70%, your workload may be disk bound, you may be generating too many transactions and submissions, or the buffer pool is too small.

The impact of creating an index on the execution plan Before SQL starts executing, Oracle determines the execution plan for the SQL statement and accesses the corresponding tables and indexes according to the steps of the execution plan. Once the

Content based on LMT management of the table space, the dictionary management has not been used. This article mainly validates these questions: 1.LMT managed tablespace, there are two ways to allocate the area: System allocation and uniform fixed

Meaning: For a transaction to have a very clear start and end point, every data manipulation statement in SQL Server, such as SELECT, INSERT, update, and delete, is part of an implicit transaction. Even if there is only one statement, the system

Program In the previous chapters we have seen several run-time features that COM + provides that simplify the development of distributed components that can be used to create scalable, maintainable ASP applications. MTS introduced the transaction

The transaction has been updated, but also to download a new version, compatible with the previous version, expanded the Dbtrans method. More concise than the transaction in section 17 (transaction). As follows

Case 3: --All of the table space data files are lost, restore data files (open) 1) test environment 07:37:23 sql> INSERT INTO scott.test values (6); 1 row created. 07:39:18 sql> INSERT INTO scott.test values (7); 1 row created. 07:39:20 sql>

A, PHP transaction processing Overview: Transactions: A collection of several events Transactions: When all events are executed successfully, the transaction is executed, and if any one of the events fails to execute successfully, the other events

mysql| Comparison | performance MySQL supports the two main table storage format Myisam,innodb, last month when doing a project, first used InnoDB, the result is particularly slow, 1 seconds can only insert 10. Later replaced by the MyISAM format, a

Transaction Processing | transaction processing ' ASP transaction processing.' Test database is SQL Server, server is native, database name is test, table name is a, two field ID (int) primary key ID, num (int)Set Conn=server. CreateObject

How to deal with the large types of CLOB and blobs CLOB can be used to store large text data, storing up to 4GB of data, and is more common in application development. Java provides a corresponding Sql.clob class. It provides two methods to read

Modification of the batch: Scene: If there is a student table student, an existing attribute [college] renamed, from "Computer College" to "Computer Engineering" [does not consider the college table]. A DML (data manipulation language) operation