bulk update

Ext.: http://www.cnblogs.com/jinzhao/archive/2013/05/31/3108755.htmlE-Text good can see directly https://github.com/loresoft/EntityFramework.ExtendedYou can also install the package directly on NuGet, and the latest version has been replaced with an

Select Goods_id,goods_type,goods_name,in_buy_price,round (SUM (in_total_price)/sum (In_amount), 2), COUNT (*) from In_ Warehouse_detail GROUP BY Goods_id,goods_type,goods_name ORDER by Goods_id,goods_type,goods_nameThe query results are as

ProblemXiao Ming's class recently monthly exam, the teacher daming want to give some excellent students to reward, and another part of the leak to check the vacancy. Daming decided to rank the top 10 of the total, the top 10 of the subjects ' scores

In some scenarios, developers want to be able to import entity data into a database in large quantities. Although it is convenient to use entity repositories to save the list of entities, the internal implementation mechanism is one-to-one saving to

The routines for caching updatesThere are four ways to update the design pattern of the cache: Cache Aside,read through,write Through,write behind cachingCache aside PatternThis is the most commonly used pattern, and its specific logic is as follows:

With the increasingly complex development of software requirements, the idea of object-oriented programming is gradually developed in the process programming thought of ancient times.When people find object-oriented in coping with the benefits of

On DUPLICATE key update batch updateMysql has a batch update method, while mssql does not use this command. mysql can use this method for batch update. More powerful: If the parameter already exists, it is updated, if this parameter is not found in

1. Percent: replace% to% $STR = ' Test the percent of this parameter, what will be replaced by '; echo sprintf ($STR); Return result: Test the% of this parameter, which will be replaced by what (percent is replaced by a%) 2. %b:

For plugins that do not already support Xcode 6.2, the new version of Alcatraz has been supported. Go to the plugin directory ~/library/application support/developer/shared/xcode/plugins Display the package contents of the Plugin Edit

Back to CatalogIt's been happening before.The older uncle had previously talked about the warehousing of MongoDB, And after the uncle developed the LIND.DDD, decided to move this thing to the storage layer of this framework, which is also the trend,

1 Reverse engineering1.1 What is reverse engineeringMybaits requires programmers to write their own SQL statements, MyBatis official reverse engineering can be automatically generated for a single table MyBatis execute the required code (mapper.java,

What can be done to ensure atomicity in a business batch operation? For example: Delete multiple articles, but in the middle one has been deleted, assuming there is an error, then how to let the whole operation rollback, and locate the error

File caching, database caching, optimized SQL, data offload, horizontal and vertical partitioning of database tables, optimized code structure!The overview of the lock statementI. Why to introduce a lockConcurrent operations on a database by

PS: This is the first time in my career it has seen such a clumsy and slightly ridiculous management way.Under normal circumstances, the client to a certain amount of scale, will be enabled domain control to manage. Some of the companies I've been

Recently, I have always seen someone on the javaeye website asking me how to process massive data in Hibernate and how to improve performance. I have read this good article on the csdn blog, and I will share it with you based on my one-by-one

Reprinted Please note: http://www.cnblogs.com/callwangxiang/archive/2009/10/20/1586753.html   Microsoft has its own MCA, but this seems too unattainable. At least 10 years of experience, 3 C-level member recommendations, 10000 $ examination fee

Hibernate3.0 uses the new anlr-based hql/SQL query translator. In the hibernate configuration file, the hibernate. query. factory_class attribute is used to select the query translator.(1) Select the query translator of hibernate3.0:Hibernate. query.

Root Cause and solution of MSSQL deadlock, root cause of mssql deadlock 1. What is deadlock? A deadlock occurs when two or more processes compete for resources during execution. Without external force, they cannot be pushed forward. at this time, it

Entity Identity Entity ID Generally, a single value is used as the entity identity. When using the compsite primary key, you must create a primary key class that represents the primary key. In this way, the compsite primary key can be represented by

I. Why should I introduce locks?When multiple users perform concurrent operations on the database, the following data inconsistency occurs:Update lossA and B read and modify the same data. The modification result of one user destroys the