Kettle implements cross-database index calculation
Kettle implements cross-database index calculation
Background note
Target table structure
Create test tables and test data
Query statement
Delete data
Kettle transformation
Delete data
Daily value
Yesterday value
Last month's value
sort
Relation
...
Posted by Domhnall on Fri, 06 Sep 2019 22:39:54 -0700
Java Development Notes (147) manage databases through JDBC
The previous section describes how to get database connection through JDBC, but the Connection object can not directly execute the SQL statement, so it needs to introduce the Statement report object to operate the SQL. The Statement object is obtained by Connection's createStatement method, which mainly provides the following two methods:Excute ...
Posted by ensanity on Fri, 06 Sep 2019 20:42:43 -0700
Using JDBC to Connect MySQL Database Operations to Add, Delete and Check
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Posted by IndianaRogers on Fri, 06 Sep 2019 07:10:08 -0700
Basic Knowledge and Exercise of C# Day23 ADO.NET Connecting Database and Query
Catalog
1. SQL Connection Connection Connecting Database
II. SqlCommand database operation
3. SQL DataReader: Getting Data from a Database
4. Exercise: Logging in, Registering and Modifying Password through Database
Ado.net: In the program, ...
Posted by Jabop on Fri, 06 Sep 2019 01:56:40 -0700
MySQL Injection in Practice
Step 1: Visiting Range
Range address: http://219.153.49.228:41377
Step 2,
1. Search
Look at the page and find the location of the single page:2. Page submission:http://219.153.49.228:41377/new_list.php?id=1 and 1=23. Return results
Return empty c ...
Posted by _tina_ on Thu, 05 Sep 2019 00:24:00 -0700
Sharing-jdbc routing analysis
Routing engines fall into two main categories:
Piecewise Routing (Direct Routing, Standard Routing, Cartesian Product Routing)
Broadcast routing (full database table routing, full database routing, full instance routing, unicast routing, blocking routing)
Specific Routing Type Meaning Reference to Official Network Routing Engine
http ...
Posted by tpl41803 on Wed, 04 Sep 2019 21:28:58 -0700
MyBatis Plus-7-Plug-in Extension
Plug-in Extension
1.1 Introduction to Mybatis Plug-in Mechanism
1.1.1 Plug-in mechanism:
Mybatis can intercept the execution of the four object-related methods through the plug-in (Interceptor), and complete the dynamic change of relevant data according to the needs.
Executor
StatementHandler
ParameterHandler
ResultSetHandler
1.1.2 Plug-in Pri ...
Posted by keeB on Wed, 04 Sep 2019 21:13:54 -0700
PLSQL Installation, PLSQL Sinicization
PLSQL Installation, PLSQL Sinicization
I. Preparations:
2. Start installation:
Importing data:
I. Preparations:
1,Click Download PLSQL The PLSQL version of this installation is 12.0.7. It is recommended to install 64 bits.
2. When downloading ...
Posted by Ne0_Dev on Wed, 04 Sep 2019 05:55:46 -0700
99%SQL optimization encountered in your work, here are all solutions for you
Previous articles introduced mysql's underlying data structure and MySQL optimized artifact explain. Some backstage friends said that Xiaoqiang only introduced the concept, usually use or face confused, strong demand Xiaoqiang to a real-world sql optimization, after two days of weekend collation and summary, sql optimization is fresh out, every ...
Posted by daria on Tue, 03 Sep 2019 07:12:43 -0700
Experience Recall (Manual) => peewee: CRUD Complete Resolution of Python-ORM
statement
Last address: https://segmentfault.com/a/11...Although I explained in the previous article, I would like to emphasize that peewee is python-ORM (MySQL,Sqlite,postgresql only)Although ORM is seamless and compatible with many databases, some fine grammars are not common to databases.I use MySQL, so the following is based on MySQL (the o ...
Posted by mgm_03 on Mon, 02 Sep 2019 07:02:40 -0700