Mysql table index problem help

I encountered several problems when creating a data table index. Please help me: 1. UPDATE table SET version =...

From [MySQLdiscussion group] 2017-06-10 09:49:40 0  2  825

mysql - 求教数据库表设计

场景是这样的：一篇文章（文章中包含图片，主图）里面包含多个商品，每个商品包含多个sku。后台可以控制文章发布状态及时间，并可对文章商品sku进行上下架。请问应该怎么设计表，每张表的表结构式怎样的

From [MySQLdiscussion group] 2017-04-17 16:47:14 0  2  825

mysql5.7 安装后无法设置密码

版本以及操作系统：Server version: 5.7.17-0ubuntu0.16.04.1 (Ubuntu-server) 尝试直接apt-get install mysql-server，安装过程中弹出让输入密码...

From [MySQLdiscussion group] 2017-04-17 16:43:20 0  3  825

mysql 数据库中varchar的长度与字节，字符串的关系

经常看到别人设置varchar的长度是255，它可以存储多少个汉字。在phpmyadmin中看到varchar的定义是变长（0-65535），它的最大长度到底是255还是65535，是不是可以设置成varchar（600...

From [MySQLdiscussion group] 2017-04-17 13:08:17 0  4  825

mysql - 数据库查询字段类型问题

{代码...} 以上三条语句执行效果是一样的 ①②里面$q是字符串型的吧 ③的$q是整型 我这样理解不知道对不对 user表里的id字段设置的是int 为何查询的时候是字符串型的也能查出来呢 菜鸟在此谢过

From [MySQLdiscussion group] 2017-04-17 11:35:29 0  4  825

mysql innodb 并发插入问题，包大量死锁错误

开了10个并发写线程，没1000条记录批量提交一次，结果mysql包大量死锁错误！ "Deadlock found when trying to get lock; try restarting tra...

From [MySQLdiscussion group] 2017-04-17 10:57:51 0  2  825

php - How to design the search association function database?

Dear friends, if you want to develop a search association drop-down function for secondary development, how sh...

From [MySQLdiscussion group] 2017-06-06 09:51:48 0  1  824

The title is rewritten as: "Flutter mysql1 received out-of-order packets"

I'm having some issues setting up a connection to my VPS using flutter's mysql1 library. When I execute the qu...

From [MySQLdiscussion group] 2023-11-05 22:34:25 0  1  823

mysql为什么叫结构化查询语言？结构化是什么意思？

结构化是什么意思？

From [MySQLdiscussion group] 2017-04-17 15:25:36 0  3  823

node.js - mysql如何通过knex查询今天和七天内的汇总数据

具体实现是要在product表中查询出今天、七天和三十天内的产品数量，具体的sql语句已经写好了 {代码...} 但是在knex.js里面我这样写根本不对 {代码...} 用having也不对,knex文档里没有看到聚合...

From [MySQLdiscussion group] 2017-04-17 14:59:44 0  1  823

MySQL的VARCHAR最大值是多少？

我看很多MySQL的表里varchar(256)，好像就没见过再大的了 varchar的最大值是多少？大于多少就不适合了？要用text

From [MySQLdiscussion group] 2017-04-17 11:09:16 0  3  823

sql statement - How to add users in batches in mysql?

To configure the company server, you need to create new MySQL accounts for everyone. It is too troublesome to ...

From [MySQLdiscussion group] 2017-06-10 09:49:40 0  1  822

java - How to solve the problem of mixed collation of mysql;

I use Spring JPA to operate the database mysql. When I first created the database, I set default-character-set...

From [MySQLdiscussion group] 2017-06-06 09:52:28 0  1  822

mysql - database multi-table joint query inserting into other libraries

The table is almost the same as below Library A table 1 content {code...} Table 2 area {code...} Table 3 categ...

From [MySQLdiscussion group] 2017-05-24 11:34:39 0  1  822

jdbc - mysql连接url后的useUnicode=true&characterEncoding=UTF-8究竟是什么意思？

UTF-8指的是啥？

From [MySQLdiscussion group] 2017-04-17 13:07:46 0  1  822