How to select a row with MAX (column value) and DISTINCT through another column in SQL?
My desk is:
id home datetime player resource
---|-----|------------|--------|---------
1 | 10 | 04/03/2009 | john | 399
2 | 11 | 04/03/2009 | juliet | 244
5 | 12 | 04/03/2009 | borat | 555
3 | 10 | 03/03/2009 | john | 300
4 | 11 | 03/03/2009 | juliet | 200
6 | 12 | 03/03/2009 | borat | 500
7 | 13 | 24/12/2008 | b ...
Posted by elflacodepr on Sun, 22 Dec 2019 00:55:52 -0800
Precise code formatting, fast style switching?All you need is SQL Prompt!
SQL Prompt not only formats the code exactly as you want, but also helps you quickly switch to other styles or apply exceptions to parts of SQL scripts that don't require specific styles.
SQL Prompt automatically retrieves object names, syntax, and code snippets from the database to provide users with appropriate code choices.Automatic script ...
Posted by Confessions on Sat, 21 Dec 2019 11:17:52 -0800
Configuring transparent gateway to access MS SQL SERVER Under Oracle
Configuration setting
The server
operating system
IP address
SQL SERVER
Windows 2003
10.9.5.47
Oracle DB
Linux 5.8
10.9.5.90
Oracle Gateways
1. Install transparent gateway
After Oracle 11G, Gateways under linux ...
Posted by xnowandtheworldx on Sat, 21 Dec 2019 10:42:10 -0800
Light ORM sqlrepoex (6) JOIN
The example uses the latest SqlRepoEx 2.0.2
Available at: https://github.com/AzThinker/SqlRepoEx2.0Demo
Or: https://gitee.com/azthinker/SqlRepoEx2.0Demo
Demo module: GettingStartedNorthwind
1. Create a new console program;
2. Download SqlRepoEx.MsSql.Static through Nuget package management
3. According to the Orders, Customers and Employees t ...
Posted by Misery_Kitty on Fri, 20 Dec 2019 09:49:10 -0800
Python 3 operates MySQL database
Operating MySQL database in Python 3
To use mysql database in Python 3, you need to install the mysql Library
pip install pymysql
Operating MySQL
Guide bag
import pymysql
Step 1: open the database connection
db = pymysql.connect(host="Database address",
user="user name",
password="Password",
...
Posted by kks_krishna on Fri, 20 Dec 2019 06:16:01 -0800
Oracle learn Lesson 6
Pseudocolumn
rowid: the physical location of the current data in the database
Features: no table, can be found
--View employee's job number, name, salary, and physical location id
select employee_id,first_name,salary,rowid
from employees;
rownum: number the query results that meet the query criteria (starting from 1)
...
Posted by shadysaiyan on Thu, 19 Dec 2019 12:48:20 -0800
Partitioning tables with online redefinition -- Based on rowid
RDBMS 11.2.0.4
Before, the table was redefined online. The primary key mode is mainly used. This time, because there is no primary key on the table, it is done through rowid. The following is a simple example, which does not involve indexes, etc. (in fact, the index is also very simple, just set it to the tmp table and take i ...
Posted by dubt2nv on Thu, 19 Dec 2019 11:58:13 -0800
Uploading and downloading pictures of wechat applet
As we all know, small programs have a large number of APIs, file (picture) upload is one of them
Let me share my personal usage. What I have done is to publish and mix images and text like space log
First is the selection of pictures. Using wx.chooseImage, the selected pictures are stored in an array for easy upload
chooseImage: ...
Posted by udendra on Thu, 19 Dec 2019 11:03:21 -0800
[android learning notes] fuzzy search for ORM Lite learning like
[Objective] to achieve fuzzy search of multiple fields in the table.
[method] ORM Lite like
Method: like(columnName,pattern) uses the% wildcard to match, specifies the row data, and returns the matching result
Usage demonstration: mDao.queryBuilder().where().like("LastName", "A%").query(); match the LastN ...
Posted by sungpeng on Thu, 19 Dec 2019 08:58:38 -0800
apache dbutils calls stored procedures based on oracle Database
Preface
Apache Commons dbutils version 1.7 shows the calls that support stored procedures. Please pay attention to the version issue when using this code.
1.7 version update method
int execute(String sql, Object… params) executes SQL statements, including stored procedure calls, which do not return any result sets. ...
Posted by xux on Thu, 19 Dec 2019 07:33:59 -0800