mysql

Select distinct rows with max date in mysql 5.7 [duplicate]

由 梦想与她 提交于 2021-02-20 03:48:14
问题 This question already has answers here : SQL select only rows with max value on a column [duplicate] (27 answers) Closed 7 months ago . Suppose having query SELECT c_id, id, max(date) as max_date FROM table GROUP BY c_id,updated And following result: c_id, id, max_date 1 5 2017-12-28 16:09:20 1 6 2019-12-28 16:09:20 2 7 2017-12-28 16:09:20 2 8 2019-12-28 16:09:20 I expect to get: c_id, id, max_date 1 6 2019-12-28 16:09:20 2 8 2019-12-28 16:09:20 How to achieve that in mysql 5.7? 回答1: Use a

Connecting Ms Access Db to Mysql through Vba

由 只谈情不闲聊 提交于 2021-02-20 03:40:23
问题 I have been trying to connect mysql database to ms Access but no result.I don't think personally I am using the DAo.Connection and the workspace properly. I keep on getting the 3001 connection error when I set mySqlCon . I guess my arguments are not properly set but I was following an example from here. Function connectingMySql() Dim mySqlCon As Dao.Connection Dim wrkODBC As Workspace Set wrkODBC = CreateWorkspace("newODBCWorkspace", "admin", "", dbUseODBC) Set mySqlCon = wrkODBC

Creating attendance in laravel

由 本小妞迷上赌 提交于 2021-02-20 02:59:05
问题 Well.. I have created a attendance system for salesman and structure of my database is users (id, name) attendances (att_id, user_id, created_at) This is the data that I have and used in creating the attendance, $final = array:2 [▼ 0 => array:3 [▼ "id" => 6 "name" => "Talha Munshi" "attendance" => array:4 [▼ 0 => array:3 [▼ "attendance" => "P" "advance" => "0" "date" => Carbon {#250 ▼ +"date": "2017-07-16 08:07:00.000000" +"timezone_type": 3 +"timezone": "Asia/Karachi" } ] 1 => array:3 [▼

MySQL ---存储过程和触发器

由 不羁的心 提交于 2021-02-20 02:59:05
MySQL存储过程和触发器 存储过程 一、一个简单的存储过程 1,一个简单的存储过程 delimiter $$ create procedure testa() begin Select * from emp; Select * from dept; End; $$; delimiter ; -- 调用存储过程 call testa(); 存储过程的结构组成： 1，创建格式:create procedure 存储过程名 2，包含一个以上代码块，代码块使用begin和end之间 3，在命令行中创建需要定义分隔符 delimiter $$ 2,存储过程的特点 1，能完成复杂的判断和运算 2，可编程性强，灵活 3，SQL编程的代码可重复使用 4，执行速度相对快 5，减少网络之间数据传输，节省开销 二、存储过程变量 1，存储过程中的变量 需求：编写存储过程，使用变量取empno=7369的用户名 Delimiter $$; Create procedure testa(); BEGIN DECLARE my_uname varchar(32) default ""; -- 定义变量my_uname SET my_uname='smith'; -- 为变量my_uname赋值 -- 查询empno=7369的用户名，并将值赋给my_uname select ename into my

Django cannot connect to mysql

由 走远了吗. 提交于 2021-02-20 02:57:09
问题 So i put my django app and mysql inside docker container. Here is what i do Docker file FROM python:3 ENV PYTHONUNBUFFERED 1 WORKDIR /app COPY requirements.txt /app/requirements.txt RUN pip install -r requirements.txt COPY . /app and here is my docker-compose-yml version: '3' services: db: container_name: database image: mysql:8 ports: - "3306:3306" command: --default-authentication-plugin=mysql_native_password environment: - MYSQL_DATABASE=django_example - MYSQL_USER=root - MYSQL_PASSWORD

Node.js API with express & mysql - Getting record count, page number, … & provide pagination

由 醉酒当歌 提交于 2021-02-20 02:53:29
问题 I would like to get and provide the total total_record_count, page_number, page_size, total_pages, has_more information in the response and being able to paginate through the result since I LIMIT the query to 100. What's the best way to do this? That's my current setup: router.get('/?', function(req, res, next) { const sql = "SELECT * from users "; const existingParams = ["title", "active"].filter(field => req.query[field]); if (existingParams.length) { sql += " WHERE "; sql += existingParams

Node.js API with express & mysql - Getting record count, page number, … & provide pagination

由 白昼怎懂夜的黑 提交于 2021-02-20 02:53:08
问题 I would like to get and provide the total total_record_count, page_number, page_size, total_pages, has_more information in the response and being able to paginate through the result since I LIMIT the query to 100. What's the best way to do this? That's my current setup: router.get('/?', function(req, res, next) { const sql = "SELECT * from users "; const existingParams = ["title", "active"].filter(field => req.query[field]); if (existingParams.length) { sql += " WHERE "; sql += existingParams

PHP/MYSQL: Database Table For Email Notifications

由 这一生的挚爱 提交于 2021-02-20 02:52:49
问题 I want to notify users of changes on a site. Users are subscribed to different kinds of changes so I don't send all changes to all users. Here's what I am thinking: at t=0 (i.e. an if statement that checks that some table is empty) I basically have an SQL query that fetches the appropriate changes and mails to the appropriate users. I then populate a user_changes table which essentially stores what changes have been mailed to what users. Mailing is done with the php mail function Then at t>0

Docker: can't connect Spring Boot & MYSQL

由 房东的猫 提交于 2021-02-20 02:15:45
问题 I try containerize my project with Dockerfile or Docker-compose. Firstly, I create container from mysql with command: docker run --name ms -p 3306:3306 -e MYSQL_ROOT_PASSWORD=password mysql then I create database and table in container and put data in table, then I build image of my project: docker build -f Dockerfile -t week . and i have logs: Sending build context to Docker daemon 212.1MB Step 1/4 : FROM openjdk ---> 30503f5328a0 Step 2/4 : ADD target/week10-1.0-SNAPSHOT.jar week10.jar --->

Select record(s) from mysql table where date is greater than or equal to today

由 梦想与她 提交于 2021-02-20 02:15:19
问题 I am working on a project that has rows in the database that contains a date. I want to echo the data for the fields that have a date that is equal or greater to today. I have looked at other post and tried a lot of different methods and have yet to succedd. Currently what I have returns an error when I do >= but when I just do = with the statement below, I get all rows from the database. $sql = "SELECT * FROM drives WHERE ddest = '{$trimmed}' AND 'leave_date' => DATE_FORMAT(CURDATE(), '%m/%d
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