commit and rollback

parameter Settings --   None: Do not do any processing (default value)WARNING: Warning Log form detailsFailing: Mapping failed, throwing exceptions and details-"Other. - alias definition --   Custom Type Processor ---- plug-in paging blocker--

Introduction: Mycat has become a powerful open source distributed database middleware product. In the face of enterprise application of massive data transaction processing, is currently the best open source solution. However, if you want to keep the

Stored procedures and functions are a collection of SQL statements that have been compiled and stored in a database, and calling stored procedures and functions can simplify the workload of the developer and reduce the data transfer between the

 Thinkphp's support for Oracle is simply weak. It only performs basic operations, and even transactions are not supported. Modify DbOracle. class. php manually today to make it easier to use.First, insert. There should be no problem with the

Ways to improve query speed with data above millions:1. Try to avoid using the! = or <> operator in the WHERE clause, or discard the engine for a full table scan using the index.2. To optimize the query, avoid full-table scanning as far as possible,

---restore content starts---What is MyBatis?MyBatis is an excellent persistence layer framework that supports the customization of SQL, stored procedures, and advanced mapping. MyBatis avoids almost all JDBC code and manually sets parameters and

PHP declarative transaction processing 1. database transactions Transaction is the basic unit of concurrency control. A transaction is a sequence of operations. these operations are either executed or not executed. it is an inseparable unit of work.

MyBatis formerly called IBatis, compared to hibernate is a lightweight ORM framework, the general small project using HIbernate is really overqualified. The two days to learn MyBatis, just a good summary of it.Let's start with a quick start!My

MyBatis is a data persistence layer (ORM) framework. The mapping relationship between entity class and SQL statement is a semi-automatic ORM implementation.Advantages of MyBatis: 1. Based on SQL syntax, easy to learn.   2. Ability to understand the

Use the new PHP plug-in to implement MySQL-based transactions. read about using the new PHP plug-in to implement MySQL-based transactions. transaction processing support has been the wish of most MySQL developers for a long time, with the release of

  Session System Variables Several system variables exist only as session variables. These cannot be setAt server startup but can be assigned values at runtime usingSetStatement (Statement t for those that are read only ).Most of them are not

Yisam: This is the default type. It is based on the traditional isam type and is a standard method for storing records and files. compared with other storage engines, MyISAM has most tools for checking and repairing tables. myISAM tables can be

Abstract: This article introduces the Excel objects and the Managed Objects in C #. Code And non-managed code, and introduces the use of COM components in the. NET environment. Keywords:Managed code; unmanaged code; EXCEL object; Dynamic

From: http://database.ctocio.com.cn/422/8919922.shtml MySQL GUI tools is a set of graphical desktop application tools that can be used to manage MySQL servers. The tool package includes three tools: MySQL query browser, MySQL administrator, and

"Introduction to Transactions"1. Transaction management is an essential technology in enterprise-level application development. used to ensure the integrity and consistency of data .2. A transaction is a series of actions that are treated as a

1. Definition of a transactionA transaction is a work that cannot be divided and must be performed concurrently. If all the work that makes up the transaction is performed, the transaction executes successfully, and if one of the items is not

Transaction processing is a common problem during data processing. The following three methods are commonly used:Method 1: directly write data to SQLUse begin trans, commit trans, and rollback trans in the Stored Procedure   Code Code

Transactions A transaction defines the boundary of a group of SQL commands. This group of commands can be fully or not executed as a whole. A typical transaction instance is transfer. Transaction Scope Transactions are controlled by three commands:

Analyze the 48 causes of slow SQL query. There are many reasons for slow query speed. The following are common causes: 1. No index or no index is used (this is the most common problem of slow queryProgramDesign defects) 2. Low I/O throughput,

Part 1ArticleI explained the cross-cutting section of the nlayerapp case. Now, let's continue to explain the basic layer (data access part) of the nlayerapp ). The basic structure (Data Access) of the nlayerapp includes the following content:Unit of