K3 BOS Form Plug-in Development - Table Header Value Change Events

In creating the form plug-in, each class has the following code:     'Definition BillEvent Interface. Statements that must be made, To get the event   Private WithEvents m_BillInterface  As BillEvent       Public Sub Show(ByVal oBillInterface As Object)           'BillEvent Interface implementation       'Be caref ...

Posted by slamMan on Mon, 08 Apr 2019 12:06:31 -0700

Why is LINQ better than SQL

If you haven't been addicted to LINQ, you'll wonder what a fuss it is. SQL is not broken. Why do we need to fix it? Why do we need another query language? The popular saying is that LINQ is integrated with C_# (or VB), thus eliminating the gap between programming language and database, and providing a single query interface for the combina ...

Posted by kimbeejo on Mon, 08 Apr 2019 00:06:32 -0700

SQL Alemchy Performance Test

Recently, a project is being perfected. Because the display interface uses django, but wants to decouple. The backstage and display interface do not directly use django's ORM, so we use SQL Alemchy to do the database interface of back-end data collection. But the performance of SQL Alemchy is not good. Today, we want to test the bottleneck of ...

Posted by prowley on Sun, 07 Apr 2019 22:39:30 -0700

Use of database connection pool

Use of database connection pool proxool Analysis of Database Connection Pool What is a database connection pool? Why use database connection pool? This is the first thing we think about when we look at database connection pools. The following author will make a simple analysis of the database connection pool with his own understanding. Dat ...

Posted by bad76 on Sun, 07 Apr 2019 22:33:31 -0700

The method of using ADO to operate database in VC (more detailed)

Reference resources: http://blog.csdn.net/augusdi/article/details/7005597 Some additions and deletions were made. Dead work: (1) Introducing ADO classes #import "c:\program files\common files\system\ado\msado15.dll"  no_namespace rename ("EOF", "adoEOF") (2) Initialization of COM AfxOleInit() can be used in MFC. Use CoInitia ...

Posted by WickedStylis on Sun, 07 Apr 2019 22:00:31 -0700

PostgreSQL TOAST Technical Understanding

Author's introduction: Senior Engineer of Hu Bin Tencent Yun TOAST is the abbreviation of "The Oversize-Attribute Storage Technology", which is mainly used to store the value of a large field. To understand TOAST, we need to understand the concept of page (BLOCK). In PG, page is the basic unit of data in file storage. Its size i ...

Posted by petersro on Sun, 07 Apr 2019 19:36:30 -0700

Java implements image upload to server and reads the uploaded image

Many websites can upload avatars, you can choose your favorite pictures as avatars, upload from the local, the next time you log in, you can directly display the uploaded avatars, so how to achieve this?   Here's my implementation process (just personal implementation ideas, how the actual website is not clear) Ideas for realization: Tools: ...

Posted by Dustin013 on Sun, 07 Apr 2019 18:42:30 -0700

JDBC Review 2 Prepared Statement and Statement

Procedures for database operations are basically add, delete and modify, but we generally do not use deletion, the main reason is that in large-scale development, we delete statements only change the value of a field to hide it, so that we can retain all the information of users, and then analysis, or avoid some unnecessary trouble. DML: Data ...

Posted by leszczu on Sun, 07 Apr 2019 17:57:30 -0700

Lesson 3 (spring-boot+mybatis+jqgrid)

Curriculum objectives Complete data curd integration with spring boot and mybatis Curriculum plan Use mybatis to complete jqgird search of blog administrators list Curriculum analysis In order to complete the list search, SQL must be logically judged and organized according to the submission search conditions, that is, dynamic sql. step 1. Addi ...

Posted by Froolah on Sun, 07 Apr 2019 17:51:30 -0700

Introduction to Amazon DynamoDB 4: Basic Operation of the Project (CRUD)

In the previous section, we introduced the operation of DynamoDB tables. This section describes the addition, modification, acquisition and deletion of items. Create project Amazon DynamoDB provides PutItem and BatchWriteItem to write data in two ways Add a single project In Amazon DynamoDB, add items to the table using the PutItem operation: { ...

Posted by njm on Sun, 07 Apr 2019 16:27:30 -0700