Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Login
Remember
Register
Ask
Q&A
All Activity
Hot!
Unanswered
Tags
Users
Ask a Question
Ask a Question
Categories
All categories
Topic[话题] (13)
Life[生活] (4)
Technique[技术] (2.1m)
Idea[创意] (3)
Jobs[工作] (2)
Others[杂七杂八] (18)
Code Example[编程示例] (0)
Recent questions tagged MySQL
0
votes
916
views
1
answer
mysql - JOIN, GROUP BY, ORDER BY
The problem I first had with the following query was that the group by clause was performed before the order by: ... cases I put it up against? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
1.3k
views
1
answer
mysql - ERROR 1136: Column count doesn't match value count at row 1
I get the Error: Column count doesn't match value count at row 1. But I've checked and rechecked my query and ... a string, not an enum type. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
994
views
1
answer
mysql - Handling foreign key exceptions in PHP
What is the best way in PHP to handle foreign key exceptions on a mysql database? Is there a mysql class ... and delete the offending records. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
796
views
1
answer
mysql - optimize select query with ORDER BY and MATCH AGAINST
The following query takes 25 seconds with 2 table joins. The first posts table has 150,00 rows, topics ... .php?115,418955,418955#msg-418955 See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
852
views
1
answer
mysql - Codeigniter/PHP check if can connect to database
I'd like to backup my read replica(i.e., slave) database with my master database but this simple boolean I ... how to do this in Codeigniter? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
932
views
1
answer
mysql - How to select ORDER BY column and RAND() both?
Hello dear friends. mysql_query("SELECT id FROM tb_table ORDER BY num ASC, ORDER BY RAND() LIMIT 1"); is ... and choose one of them randomly. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
1.0k
views
1
answer
mysql - SQL query dynamic table name in FOR
I have a table tbl1 which has a column tbl_names. This column contains the name of some other tables. Now I ... and execute first query? Thanks See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
929
views
1
answer
mysql - How do I reset sequence numbers to become consecutive?
I've got a mysql table where each row has its own sequence number in a "sequence" column. However, when ... are displayed within the app. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
970
views
1
answer
mysql - Using Trigger to update table in another database
im using the following trigger to update the user table in another database in mysql 5.0.7 The creation of trigger ... .id; END; | delimiter ; See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
786
views
1
answer
mysql - What is the cost of indexing multiple db columns?
I'm writing an app with a MySQL table that indexes 3 columns. I'm concerned that after the table reaches a ... 25 and 200 records a day. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
1.1k
views
1
answer
mysql - What makes the big difference between a backtick and an apostrophe?
What is the reason that the following two queries give wildly different results? MariaDB [mydatabase]> SELECT ... meaning of the apostrophe. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
1.3k
views
1
answer
mysql - Why is InnoDB table size much larger than expected?
I'm trying to figure out storage requirements for different storage engines. I have this table: CREATE TABLE `mytest` ... a 4-byte unsigned int? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
1.1k
views
1
answer
mysql - No suitable driver found for jdbc in Spark
I am using df.write.mode("append").jdbc("jdbc:mysql://ip:port/database", "table_name", properties) to insert ... driver found for jdbc" error. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
1.2k
views
1
answer
mysql - At-Sign in SQL statement before column name
I have an INSERT statement in a PHP-file wherein at-signs (@) are occurring in front of the column name. ... refman/5.0/en/load-data.html See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
1.1k
views
1
answer
mysql - Installing phpMyAdmin onto Amazon EC2 instance
I've configured my EC2 instance as a LAMP, following Amazon's tutorial. That appears to be functioning correctly ( ... I cannot figure out what. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
925
views
1
answer
mysql - Find the average of two combined columns in sql
I want to find the avg of the total of two columns. I want to count the total of col1 and the total of col2 ... (*)) FROM test WHERE uid=5 ) See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
1.3k
views
1
answer
mysql - ld: library not found for -lzstd while bundle install for mysql2 gem Ruby on macOS Big Sur 11.4
while running bundle install An error occurred while installing mysql2 (0.5.3), and Bundler cannot continue. Make ... run: brew reinstall mysql See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
3.8k
views
1
answer
mysql - C# Entity Framework: Keyword not supported: 'port'
Hello I have more than one project connecting to a certain DB that is CodeFirst Entity Framework. All ... system.webServer> </configuration> See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
3.8k
views
2
answers
mysql - mysqldump command not working?
I am using mysqldump to take backup of my database, but the command is not working.. the command i am using ... any thing wrong in the command? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
1.3k
views
1
answer
mysql - java.sql.SQLException: Unknown system variable 'tx_isolation'
I am using play framework and I want to connect db, but I can't because I am getting following error: play ... first time... Thank you. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
1.2k
views
1
answer
mysql - Duplicate entry '2147483647' for key 1
Strange problem I can't seem to get my head around. I have a table in a MySQL database with the following ... have any ideas? Many thanks! See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
962
views
1
answer
mysql - Must database primary keys be integers?
I always see MySQL database primary keys as integers. Is that because primary keys must be integers, or because of ... a varchar in the future. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
1.1k
views
1
answer
mysql - Which one is faster: correlated subqueries or join?
I know we can do correlated subqueries and join. But which one is faster? Is there a golden rule or I must measure both? See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
1.0k
views
1
answer
mysql - PHP convert datetime to seconds
I have a datetime value in mysql '2010-12-08 16:12:12' that I'd like to get the seconds to that date using PHP, ... -12-08 16:12:12',now())) See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
991
views
1
answer
mysql - Alter a live table to make a key non-unique
I saw some other questions related to this, but they were not MySQL. The database is a live database, so I ... it shouldn't cause any problems. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
1.1k
views
1
answer
mysql - Sort by JSON field values
I have a table with json values like this: -Table 1 id | name | data ------+----------+----- ... ! P.S: city_name have UTF-8 characters. See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
934
views
1
answer
mysql - UNIQUE Constraint, only when a field contains a specific value
I'm trying to create a UNIQUE INDEX constraint for two columns, but only when another column contains the value 1. ... I made myself clear. : See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
0
votes
1.3k
views
1
answer
mysql - How to join three tables to get Sum
I have three tables: Products, Purchase, Invoice Product table: Producct_no Name 1 A 2 B 3 C Purchase table ... get the results properly. thanks See Question&Answers more detail:os...
asked
Oct 24, 2021
in
Technique[技术]
by
深蓝
(
71.8m
points)
mysql
Page:
« prev
1
...
4
5
6
7
8
9
10
11
12
13
14
...
105
next »
Ask a question:
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question
Just Browsing Browsing
[1] 前端UI套件 wijmo
[2] 使用axios报错 Request failed with status code 404
[3] RequestAnimationFrame暂停与恢复问题
[4] 怎么制作生产一些无用复杂的js 用于混淆视听
[5] Axios interceptor 这段 ForEach 函数有什么用?
[6] java继承的问题
[7] react devtools怎么样配置才能更简洁
[8] 更新 HTTPS证书 IOS需要重新打包?
[9] api - How to get data from coinapi when only press a button flutter
[10] amazon web services - AWS lambda authorizer, Custom Context values in REST API
2.1m
questions
2.1m
answers
60
comments
57.0k
users
Most popular tags
javascript
python
c#
java
How
android
c++
php
ios
html
sql
r
c
node.js
.net
iphone
asp.net
css
reactjs
jquery
ruby
What
Android
objective
mysql
linux
Is
git
Python
windows
Why
regex
angular
swift
amazon
excel
algorithm
macos
Java
visual
how
bash
Can
multithreading
PHP
Using
scala
angularjs
typescript
apache
spring
performance
postgresql
database
flutter
json
rust
arrays
C#
dart
vba
django
wpf
xml
vue.js
In
go
Get
google
jQuery
xcode
jsf
http
Google
mongodb
string
shell
oop
powershell
SQL
C++
security
assembly
docker
Javascript
Android:
Does
haskell
Convert
azure
debugging
delphi
vb.net
Spring
datetime
pandas
oracle
math
Django
联盟问答网站-Union QA website
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
DevDocs API Documentations
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
在这了问答社区
DevDocs API Documentations
Xstack问答社区
生活宝问答社区
OverStack问答社区
Ostack问答社区
在这了问答社区
在哪了问答社区
Xstack问答社区
无极谷问答社区
TouSu问答社区
SQlite问答社区
Qi-U问答社区
MLink问答社区
Jonic问答社区
Jike问答社区
16892问答社区
Vigges问答社区
55276问答社区
OGeek问答社区
深圳家问答社区
深圳家问答社区
深圳家问答社区
Vigges问答社区
Vigges问答社区
在这了问答社区
DevDocs API Documentations
广告位招租
...