etl batch processing

Use NHibernate to insert nearly 100,000 records into the database, as in the following example:ISession session = session. BeginTransaction (); for int i=0; i100000; i++ ) { new Customer (...); Session. Save (customer);} Tx.commit (); session. Close ();This will throw OutOfMemoryException and terminate at about 50 000 records. This is because nhibernate caches all newly inserted customer instances in the Session-level cache.When you persist a new object, you must constantly control the s

Windows batch processing-file name modification tutorial, batch processing file namePurpose You can batch modify a regular file name for any file name, as shown below: Rename by keith.gifUsage Create a new file (.txt), copy the following code, save it, and change the fi

Windows Command Line (batch processing) file delay (sleep) method, batch processing sleep In Windows, the next batch processing file does not have the same Sleep function as in Linux for latency

Use the actions in PS for batch processing. it can adjust the size, crop, compress, rotate, adjust the color, and so on. Today, I will teach you how to use ps to batch process images. it is very powerful and convenient! Let's take a look at the tutorial and use the action in PS for batch

PostgreSQL registration Start and Stop unmount batch processing script, postgresql Batch Processing Register to start pg_install.bat: echo offset PGSQL_DIR=%~dp0if not "%PGSQL_HOME%"=="" ( if not "%PGSQL_HOME%"=="%PGSQL_DIR%" ( echo PGSQL_HOME=%PGSQL_HOME% != PGSQL_DIR=%PGSQL_DIR% goto pg_ends )) el

How to back up Oracle batch processing on Windows (with scheduled tasks or third-party timing software, you can achieve automatic backup), oracle Batch Processing@ Echo start to back up oracle Data@ Echo offSetSet curdir = "D: \ backup"Echo % curdir %Set t1 = % Time :~ 0, 1%If "% t1 %" = "" set t1 = 0Set td = % Date :~

Java MySQL batch processing and javamysql Batch Processing In essence, it is to use the addBatch () method of Statement and PreStatement. Code import java.sql.*;public class GetConnection{public static void main(String[] args){Access2Database adb=new Access2Database();Connection conn=adb.getConn();//transaction dealin

Windows batch processing: automatically deploy common software (Silent Installation) and batch processing common software I. Introduction I have been testing to use domain group policies to automatically deploy software for a short time. First, the host must be added to the domain for the policy to take effect. In fact

MYSQL registration Start and Stop unmount batch processing script (Supplement), mysql Batch Processing The batch file that was written earlier when the mysql interface was debugged. Register and start my_install.bat @echo offset MYSQL_DIR=%~dp0rem set MYSQL_DIR=%cd%if not "%

JDBC provides the ability of database batch processing to significantly improve the performance of the system in the case of large volume operations (additions, deletions, etc.). I have contacted a project, in the absence of batch processing, delete 50,000 data about half an hour or so, and then the system to transform

Label:JDBC provides the ability of database batch processing to significantly improve the performance of the system in the case of large volume operations (additions, deletions, etc.). I have contacted a project, in the absence of batch processing, delete 50,000 data about half an hour or so, and then the system to tra

about Spring Batch Spring batch is a lightweight batching framework, and his lightweight is relative to the cluster batch architecture of MapReduce and Spark. Although spring batch supports machine clustering, multi-threaded parallel processing is used for single machines.

Jdbc pre-processing, batch processing, LOB field processing, calling stored procedure, jdbclob (1) jdbc execution preprocessing PreparedStatment preparation statement Eg: String SQL = "insert into user (id, name, birthday, money) values (5, 'admin ',?, '123 ')"; PreparedStatement stmt = conn. prepareStatment (SQL ); St

Batch, also known as a batch script. As the name implies, batching is a batch processing of an object and is often considered a simplified scripting language that is used in DOS and Windows systems. The batch file has a name extension of bat. At present, the more common

How does MySQL use PHP to batch insert? For example, after the end of the first 1000 data processing, then processing 1001 to 2000, and then processing 2001 to 3,000 ... until the whole process is finished?

first parameter of a batch%2 returns the second parameter of the batch%3-%9 According to this kind of push Back batch parameters? What exactly is the return method? Let's look at this example and save the following code as test. BAT and put it under the C disk. @echo off echo%1%2%3%4 echo %1 echo%2 echo%3- %4 Enter cmd, input CD C:\Then enter Test

Hibernate operates databases in an object-oriented way. When a program operates persistence objects in an object-oriented way, it is automatically converted to database operations. For example, if we call the delete () method of the Session to delete the Persistent Object, Hibernate will delete the corresponding data record. When we execute the setter method of the Persistent object, hibernate will automatically convert to the underlying update statement to modify the corresponding records of th

A tutorial on Spring batch processinghttps://www.petrikainulainen.net/programming/spring-framework/spring-batch-tutorial-introduction/About batching: Batch processing is a complete piece of workIts features include correct output, fault tolerance, and fast processing.Process profiling for

Batch Home Discovery System class application code implemented with batch processing such as the ordering of the menu, you use a different method And the way of output ... We'll know when we use it. It's not good to write. Please give us a lot of advice. Because the code is too long, please download the attachment. The reply is the virtue, the next will be top AH

1.1 Learning the Echo rem CD dir command Learning points:1. Display information: Echo2. Comment Statement: REM3. Directory Switching: CD4. Column File name: dir One, display information: Echo Before we learn the echo command, we'll build a new folder bat under C disk and build an empty bat file. For instance, I'm mybat.bat.We began the first chapter of section 1.1 of the Getting Started handbook on batch proces