mysql

Sort values that contain letters and symbols in a custom order

由 ╄→尐↘猪︶ㄣ 提交于 2021-02-08 05:14:39
问题 Can you change the MySQL sort by function? I am trying to sort my values according to an arbitrary order. Currently looking for ways to inject a function that might help me out here short of adding a column and modifying the import. This is the order I want: AAA AA+ AA AA- A+ A A- BBB+ BBB BBB- BB+ BB BB- B+ B B- CCC+ CCC CCC- CC This is my result using sort by: A A+ A- AA AA+ AA- AAA B B+ B- BB BB+ BB- BBB BBB+ BBB- C CC CCC CCC+ CCC- EDIT: Attempting but getting syntax errors: CREATE

Sort values that contain letters and symbols in a custom order

由 大兔子大兔子 提交于 2021-02-08 05:14:38
问题 Can you change the MySQL sort by function? I am trying to sort my values according to an arbitrary order. Currently looking for ways to inject a function that might help me out here short of adding a column and modifying the import. This is the order I want: AAA AA+ AA AA- A+ A A- BBB+ BBB BBB- BB+ BB BB- B+ B B- CCC+ CCC CCC- CC This is my result using sort by: A A+ A- AA AA+ AA- AAA B B+ B- BB BB+ BB- BBB BBB+ BBB- C CC CCC CCC+ CCC- EDIT: Attempting but getting syntax errors: CREATE

To insert csv file into mysql database table using c# windows form

由 你。 提交于 2021-02-08 05:10:35
问题 i need to upload that excel file to mysql database table. My Excel File Contains columns like: userid,password,first_name,last_name,user_group AND MySql Database My table(aster_users) Contains many columns like: userid,password,first_name,last_name,user_group,queue,active,created_date,created_by,role .. My code looks like this: String MyCon = "SERVER=*****;" + "DATABASE=*****;" + "UID=root;" + "PASSWORD=******;" + "Convert Zero Datetime = True"; private void btnchoose_Click_1(object sender,

To insert csv file into mysql database table using c# windows form

由 女生的网名这么多〃 提交于 2021-02-08 05:10:34
问题 i need to upload that excel file to mysql database table. My Excel File Contains columns like: userid,password,first_name,last_name,user_group AND MySql Database My table(aster_users) Contains many columns like: userid,password,first_name,last_name,user_group,queue,active,created_date,created_by,role .. My code looks like this: String MyCon = "SERVER=*****;" + "DATABASE=*****;" + "UID=root;" + "PASSWORD=******;" + "Convert Zero Datetime = True"; private void btnchoose_Click_1(object sender,

mysql-connector won't import into script in pycharm

由 走远了吗. 提交于 2021-02-08 04:56:33
问题 I have successfully installed mysql-connector using pip. Installing collected packages: mysql-connector Running setup.py install for mysql-connector ... done Successfully installed mysql-connector-2.1.6 However, in PyCharm when I have a script that uses the line: import mysql-connector PyCharm gives me an error saying there isn't a package called "mysql" installed. Is there some sort of syntax that should be used to indicate that the entire package name contains the "-" and is not just "mysql

解决python写入mysql中datetime类型遇到的问题

由 匆匆过客 提交于 2021-02-08 04:56:12
解决python写入mysql中datetime类型遇到的问题 刚开始使用python，还不太熟练，遇到一个datetime数据类型的问题： 在mysql数据库中，有一个datetime类型的字段用于存储记录的日期时间值。python程序中有对应的一个datetime变量dt。 现在需要往mysql数据库中添加记录，每次添加时，将datetime型变量dt写入mysql数据库tablename表中exTime字段里。 问题，如何写入？调试时，总是无法写入。 运行环境：windows10 python 3.6 mysql5.6.38 运行结果提示： Process finished with exit code 0 #------看我写的程序------------- import datetime import pymysql.cursors conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='', db='test', charset='utf8', cursorclass=pymysql.cursors.DictCursor) #中间略去dt赋值部分... print(dt.strftime('%Y-%m-%d %H:%M:%S')) #运行结果是 2001-1-2 11：00

对容器镜像的思考和讨论

由 一世执手 提交于 2021-02-08 04:41:41
简介： 常言道，startup 有 startup 的好，大厂有大厂的好，那么大厂究竟好在哪呢？拿硅谷老牌大厂们 FLG 来说，如果要问最令人怀念的是什么？Free food 和基础设施(Infrastructure)一定是会上榜的，两者均极大提升了广大应用开发者的幸福指数。那么能不能“让天下没有难做的应用”呢？请大家把目光投向正在兴起的云原生生态。 前言 常言道，startup 有 startup 的好，大厂有大厂的好，那么大厂究竟好在哪呢？拿硅谷老牌大厂们 FLG 来说，如果要问最令人怀念的是什么？Free food 和基础设施(Infrastructure)一定是会上榜的，两者均极大提升了广大应用开发者的幸福指数。那么能不能“让天下没有难做的应用”呢？请大家把目光投向正在兴起的云原生生态。 在云原生生态中，容器服务包括了镜像和容器引擎两个部分。其中容器镜像作为核心的云原生应用制品，打包了完整的操作系统和应用运行环境，应用的迭代也因为使用了这种不可变架构而变得更简单，更频繁。 本文将围绕着容器镜像这一核心，分享它的相关知识和业界的思考与实践。 容器镜像的概念 1）容器镜像 容器镜像有一个官方的类比，"生活中常见的集装箱"，虽然拥有不同的规格，但箱子本身是不可变的（Immutable），只是其中装的内容不同。 对于镜像来说，不变的部分包含了运行一个应用软件（如 mysql

how to fix mysql error number #1250 Table 'a1' from one of the SELECTs cannot be used in field list?

由 拟墨画扇 提交于 2021-02-08 04:41:07
问题 I am doing following way to sorting data by date and time select b.app_user_id,b.username,a.message_content,a.message_to,a.message_date from app_messages a left join app_users b on a.message_from = b.app_user_id where a.message_to=1 and b.app_user_id= 4 UNION select b1.app_user_id,b1.username,a1.message_content,a1.message_to,a1.message_date from app_messages a1 left join app_users b1 on a1.message_from = b1.app_user_id where a1.message_to=4 and b.app_user_id= 1 order by a1.message_date,a

flask-sqlalchemy: Trouble joining tables from two databases (different bind keys). Getting error 1146 (see below)

由 孤人 提交于 2021-02-08 04:39:25
问题 I'm building a Flask-Restful API using python and sqlalchemy, and I'm trying to join two tables from different databases. It appears that I'm only able to search for tables in one database at a time. Am I missing something? from flask_sqlalchemy import SQLAlchemy from flask import Flask, jsonify, request app = Flask(__name__) app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://username:password@host:8000/database1' app.config['SQLALCHEMY_BINDS'] = { 'database2': 'mysql://username:password@host

Connecting to MySQL database in django using workbench

由 依然范特西╮ 提交于 2021-02-08 04:36:31
问题 I've got a django project connected to a MySQL database as follows: settings.py DATABASES = { 'default': { 'ENGINE': 'django.db.backends.mysql', 'NAME': 'my_db', 'USER': 'username', 'PASSWORD': 'mypassword', 'HOST': '', 'PORT': '', } } on running python manage.py syncdb , it creates the database and on runserver the application runs perfectly and I'm able to input data into the models using the admin panel correctly. However, on trying to connect to the database using MySQL Workbench, it
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