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How to update JSON data type column in MySQL 5.7.10?

I recently started using MySQL5.7.10 and I really like the native JSON data type. But I have a problem while u...

From [MySQLdiscussion group] 2023-10-16 19:03:34 0  2  976

mysql - 表的主鍵都是varchar(64),有什么不好？

見識(shí)到一個(gè)java項(xiàng)目，mysql數(shù)據(jù)庫，所有表的主鍵都是varchar(64)

From [MySQLdiscussion group] 2017-04-17 15:06:53 0  4  976

Mysql partition error, and how to optimize the novel subscription table?

{Code...} mysql reported this error when creating a partition: For RANGE partitions each partition must be def...

From [MySQLdiscussion group] 2017-05-18 10:53:57 0  1  975

How to find the average value of specified field data in mysql

Table price, field category, value 55, average field pi category, pi55 10055 10556 13055 9555 8059 11555 10155...

From [MySQLdiscussion group] 2017-05-18 10:52:53 0  1  975

How to import dumb.rdb file on redis and export to mysql database

RDB files of REDIS servers imported from other servers. I have installed REDIS on my local machine and am tryi...

From [MySQLdiscussion group] 2023-08-25 11:36:38 0  2  974

c# - MySqlDataAdapter使用Update以后在使用Fill填充Table時(shí)得不到數(shù)據(jù)

在wpf中從數(shù)據(jù)庫讀取到的數(shù)據(jù)binding到DataGrid,然后將修改后的DataTable更新到數(shù)據(jù)庫中第一次select查詢以及綁定沒有問題,updateDataTable到數(shù)據(jù)庫,數(shù)據(jù)庫中的數(shù)據(jù)被更新,然后再次...

From [MySQLdiscussion group] 2017-04-17 15:26:28 0  1  974

mysql 數(shù)據(jù)庫中varchar的長度與字節(jié)，字符串的關(guān)系

經(jīng)常看到別人設(shè)置varchar的長度是255，它可以存儲(chǔ)多少個(gè)漢字。在phpmyadmin中看到varchar的定義是變長（0-65535），它的最大長度到底是255還是65535，是不是可以設(shè)置成varchar（600...

From [MySQLdiscussion group] 2017-04-17 13:08:17 0  4  974

一個(gè)導(dǎo)出文件DMP，DMP其中只有一張表，大小為1G，導(dǎo)入到測試庫中為什么300G的硬盤還少了，請大俠幫分析，求導(dǎo)入的解決方案

一個(gè)導(dǎo)出文件DMP，DMP其中只有一張表，大小為1G，導(dǎo)入到測試庫中為什么300G的硬盤還少了，請大俠幫分析，求導(dǎo)入的解決方案

From [MySQLdiscussion group] 2016-11-07 15:04:27 0  0  974

The rewritten title is: Configuring PHPUnit database using PhpStorm Docker

I have set up PhpStorm using Docker: PHP, PHPUnit and I see the schema in PhpStorm/Database Viewer and I can u...

From [MySQLdiscussion group] 2023-11-01 20:53:17 0  1  973

mysql - sql optimization problem, between is better than in?

I saw information on the Internet saying: {code...}

From [MySQLdiscussion group] 2017-05-18 10:56:50 0  4  973

javascript - Baidu coordinates, returns the coordinates near the target

Now there is a table recording user coordinates (using Baidu API), with two field records, such as coordinates...

From [MySQLdiscussion group] 2017-05-25 15:08:24 0  1  972

安裝mysql-5.7.12-linux后，啟動(dòng)報(bào)錯(cuò)，求解讀

service mysql startStarting MySQL...The server quit without updating PID file (/usr/local/mysql/data/CDCS-2130...

From [MySQLdiscussion group] 2017-04-17 14:44:40 0  1  972

Using variables within strings for SQL queries using python

I want to see all the data of a specific table of sql database world entered by the user, the code below will ...

From [MySQLdiscussion group] 2024-03-22 12:35:15 0  1  971

mysql - 索引過濾性不好是由什么原因引起的，應(yīng)該怎么解決

索引過濾性不好是由什么原因引起的，應(yīng)該怎么解決

From [MySQLdiscussion group] 2017-04-17 15:20:05 0  1  971

The JSONArray field of the Spring Boot returned model is empty

I have a JSONArray field in the object: @Column(name="_history",columnDefinition="JSON")@C...

From [MySQLdiscussion group] 2023-09-12 15:56:44 0  1  970