From the transaction code smw01, we can see that a BDOC may be sent to more than one target site. For example, the five sites shown in the transaction code will receive the site, the highlighted smof_erpsite indicates that client 504 of ERP system qi3 receives the BDOC.So where is the site in the list read from?Take bdocproduct_mat as an example to maintain the callback function in the smw3fdbdoc View:The first callback smoh_replication_wrapper_msg is responsible for deciding the sites from whic
This article illustrates the simple subscriber and publisher pattern of JS mode. Share to everyone for your reference. as follows:
The wants this article to help you with your JavaScript programming.
C # event sender and receiver (subscriber)Windows-based applications are message-based. Windows uses predefined messages to communicate with applications.. NET Framework encapsulates Windows messages in events and uses events as the communication medium between objects.Event Sender: the object that sends the eventEvent receiver: the object that captures the event and responds to it (processing the event)In the event communication mechanism, the event
Original article: http://tech.163.com/05/1008/10/1VHJQ7TS00091589.html
Two days ago, I encountered such a problem: the page break I added to the word will be explicitly displayed in the document. The first time I encountered such a problem.First, I don't know how to display it; second, I don't know how to remove it.If you don't want to mention that the current information is developed, you can search for it to solve the problem.
The Delimiter is a format mark that we often use when editing t
International Mobile User identification code (imsi) International Mobile Subscriber IdentityThe number assigned by a mobile user is uniquely identified internationally.Technically speaking, imsi can completely solve the problem of international roaming. However, because a large number of AMPS Systems in North America still use min numbers, and MDN and min in North America use the same number, the system cannot be changed. Currently, international roa
The example in this article describes the C # micro-public number and subscriber interface development sample code. Share to everyone for your reference, specific as follows:
Using System;
Using System.Web;
Using System.IO;
Using System.Text;
Using System.Web.Security;
Using Weixin_api; public class Wxgz_api:ihttphandler {public void ProcessRequest (HttpContext context) {context.
Response.ContentType = "Text/plain"; String poststring = Strin
Observer mode (also known as publisher-Subscriber mode) should be one of the most common patterns. are used in a lot of languages. Including the DOM events we normally touch. It is also an observer pattern implemented between JS and Dom.
Copy Code code as follows:
Div.onclick = function Click () {
Alert ("click")
}
Just subscribe to the div click event. When you click on the div, the function click is triggered.
So what
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The test results are: count (*) and COUNT (1) are basically equal, count (non-primary key field) is the most cost-consuming--Data Volume 708254Select COUNT (*) from tmp_test1;--avg 0.2240.2290.2190.2270.2220.2150.2240.2250.2210.2400.219Select COUNT (1) from tmp_test1;--avg 0
Execution effect:
1. Count (1) and COUNT (*) when the table has a larger amount of data, using count (1) is more time-consuming than using count (*) when analyzing the table. From the execution plan, the effect of count (1) and COUNT
1) count (1) compared to COUNT (*):1. If your data table does not have a primary key, then count (1) is faster than COUNT (*)2, if there is a primary key, then the primary key (Union primary key) as the count of the condition is also faster than
Either count (*) or COUNT (1) or count ([column]) in SQL Server is perhaps the most commonly used aggregate function. Many people actually distinguish between the three. This article will explain the role of these three, relations and the underlying principles.
I often see some so-called optimization recommendations that use
Tags: unable to images creat upd introduction logs question purge SRC1. The difference between count (1), COUNT (*), and count (column name)Believe that you are always at work, or in the study of Count () in the end how to use faster. There has been a lot of doubt, some people say that
Tags: Oracle countAfter listening to nearly 20 speeches in the last two days, I felt a lot of harvest, and the deepest feeling was that I still had a long way to go. There are several points to note:Listening to the old cat yesterday, it is a common problem that Oracle has a problem with count (*), COUNT (1), and count (primary key). This question seems very simp
Label:The difference between count (1) count (*) count (field) usage in SQL statementsThe Count function is one of the most commonly used functions in SQL statements, and the Count function is a function of the number of records in the statistics table.A. The difference betw
Tags: style http color using AR strong data div problemCount () differs from sum () in MySQLFirst, create a table to illustrate the problem create table ' result ' (' name ' varchar () default NULL, ' subject ' varchar () default NULL, ' Score ' tinyint ( 4) Default NULL) Engine=myisam default Charset=utf8 inserts some data, insert into result values (' Zhang San ', ' math ', 90), (' Zhang San ', ' language ', 50), (' Zhang San '), ' geography ', 40), (' John Doe ', ' language ', 55), (' John Do
The table structure is as follows:
The code is as follows
Copy Code
Mysql> Show CREATE TABLE Userg;1. Row ***************************Table:userCreate table:create Table ' user ' (' ID ' int (a) unsigned not NULL auto_increment,' Name ' varchar not NULL,' pwd ' varchar not NULL,' Email ' varchar not NULL,' Phone ' varchar not NULL,' Sex ' enum (' F ', ' M ', ' n ') not NULL DEFAULT ' n ',' addres ' varchar not NULL,' tag ' varchar not NULL,PRIMARY KEY (' id '),KEY ' na
The table structure is as follows:Mysql> Show CREATE TABLE user\g;*************************** 1. Row *************************** table:usercreate table:create Table ' user ' ( ' id ' int (ten) unsigned not NULL AUTO _increment, ' name ' varchar (NOT null), ' pwd ' varchar (') ' is not null, ' email ' varchar (+) NOT NULL, ' Phone ' varchar ' NOT null, ' sex ' enum (' F ', ' M ', ' n ') is not null DEFAULT ' N ', ' addres ' varchar (+) NOT null, ' t AG ' varchar ' not NULL, PRIMARY
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