我正在构建一个应用程序,在这个应用程序中,对于一个特定的调用,我必须在连接之前阻塞并等待身份验证查询的结果。
function authenticate(userid, hash)
{
mysql_client.query("SELECT `hash` FROM `auth` WHERE `userid` = " + userid, function selectCb(err, results, fields) {
if (err)
{
client.send("Error communicating with mysql, plea
是否可以在scala和play2.5中使用mauricio/mysql-async驱动程序来连接mariadb数据库?我现在正在mariadb-java-client中使用jooq。
您是否知道任何用于scala/play的异步mariadb驱动程序,或者您是否有配置mysql-async驱动程序的示例,这些驱动程序来自mauricio for mysql或mariadb?
我正在尝试从我的users数据库备份我的cia表
我创建了这个示例片段
实例
#db = cia
#table = users
mysqldump cia users > cia.users.sql && L <<-------- ✅
mysql -u root cia -e "TRUNCATE TABLE users;" <<-------- ✅
mysql -u root cia -e "SELECT COUNT(*) FROM users;" <<-------- ✅
mysql -u r
我是个新手程序员。我一直在做一个很小的网站。我没犯什么错。我找到了一些解决办法。但我还没有得到答案。
如果你不介意,请把你的手指头给我。T^T
我将node.js与Mysql连接起来。“‘GET”运行没有任何问题。但是“POST”部分无法获得我在网页上输入的一些数据。
我想知道的是,为什么'POST‘得不到数据。
var fs = require('fs');
var ejs = require('ejs');
var http = require('http');
var mysql = require('mysql')
我试着跟踪和的帖子
但我还远不能找到这个问题的真相答案。
这里还有什么东西我遗漏了吗?
d:\Projects\Ruby\cms>gem install mysql2 --platform=ruby -- '--with-mysql-dir="C:\mysql-connector-c-6.1.3-winx64"'
Temporarily enhancing PATH to include DevKit...
Building native extensions. This could take a while...
ERROR: Error insta
自动安全更新破坏了我的mysql安装,我不知道如何修复它。据我所知,5.5和mysql包都在同一个versio0n 5.5.31上。但是核心要求客户端保持在旧版本上。
apt-get upgrade
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
mysql-client-core-5.5 : Breaks: mysql-client (< 5.5.31-0ubuntu0.12.04.1)
E: Unm
我想建立一个服务器-客户端连接。得到了吗?wait()?如何避免僵尸等。
int main( void )
{
pid_t client_pid;
pid_t wait(int *status);
Socket server, client;
int bytes;
// open server socket
server = tcp_passive_open( PORT );
while( 1 ) {
client = tcp_wait_for_connection( server );
//create new pr
每当请求到达apache服务器时,它都无法满足它。我在apache错误日志中得到以下错误
[Fri Nov 21 18:02:02 2014] [info] [client 10.246.86.135] Connection to child 75 established (server myserver.com:443)
[Fri Nov 21 18:02:02 2014] [info] Seeding PRNG with 1024 bytes of entropy
[Fri Nov 21 18:02:02 2014] [debug] ssl_engine_kernel.c(1871): O
当我想在.format的select查询中传递其他变量时,使用MySQL的正确方法是什么?
例如,我有一个查询,我无法确定如何正确地将所有参数一起传递
a = "c9" # this is for %s
b = "TEMP" # this is for the first {}
c = "1 hour" # this is for the last {}
c.execute("SELECT Client, {}, Date_Time from data where Client = %s and Date_Time > DATE_S
我想在Ubuntu16.04中重新安装mysql。
mysql-server is already the newest version (5.7.21-0ubuntu0.16.04.1).
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
mysql-server : Depends: mysql-server-5.7 but it is not going to be installed
E: Unmet
我在Ubuntu16.04上面临的一个非常愚蠢的问题。我想同时删除MySQL和MariaDB客户端。如果运行apt remove mysql-client*,我会收到以下消息:
The following additional packages will be installed:
mariadb-client mariadb-client-10.0 mariadb-client-core-10.0 mariadb-common
The following packages will be REMOVED:
mysql-client mysql-client-5.7 mysql-cli
我想将参数设置为原生查询,
javax.persistence.EntityManager.createNativeQuery
类似这样的东西
Query query = em.createNativeQuery("SELECT * FROM TABLE_A a WHERE a.name IN ?");
List<String> paramList = new ArrayList<String>();
paramList.add("firstValue");
paramList.add("secondValue");
qu
我正在尝试更新我的mysql版本,但是它显示了错误,我使用的是LinuxMint17.3版本
使用的命令
sudo apt-获取安装mysql-server mysql-client mysql-通用mysql-server-core-5.7 mysql-client-core-5.7
它展示了这个
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package mysql-client-core-5.7 is not available, but
我正在尝试在Debian9安装中安装MySQL服务器,而apt-get坚持要通过以下方式安装这个mariadb-client-10.1:
sudo apt-get install mysql-server mysql-client
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
li
页面没有提到fabric-ca客户端使用的默认enrollment.profile是什么。
$ fabric-ca-client enroll --help
Enroll identity with Fabric CA server
Usage:
fabric-ca-client enroll -u http://user:userpw@serverAddr:serverPort [flags]
Global Flags:
--caname string Name of CA
--csr.cn string
我试着用Ubuntu软件中心安装mysql服务器和mysql工作台,但是它无法安装它们。然后,我使用命令行安装mysql服务器,并重新运行以下代码:
sudo apt-get update && sudo apt-get upgrade
sudo apt-get install mysql server
但是,在最后一个命令之后,我得到了以下错误:
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are us
当我尝试捆绑应用程序时弹出这个错误的原因:我已经按照他们的建议安装了gem install mysql2 -v '0.3.21‘,但是它不能正确安装。此外,我正在macOS高塞拉上运行此程序。很抱歉我对这个问题的措辞不好,因为这是我第一次使用ruby。
To see why this extension failed to compile, please check the mkmf.log which can be found here:
/Users/yamanshrestha/Desktop/Dorsata/vendor/bundle/ruby/2.3.0/extensi
当我试图安装mysql2适配器gem时,我会得到以下错误:
gem install mysql2 -v 0.3.21
Building native extensions. This could take a while...
ERROR: Error installing mysql2:
ERROR: Failed to build gem native extension.
/Users/jwan/.rbenv/versions/2.1.2/bin/ruby extconf.rb
checking for ruby/thread.h... yes
checking f
我使用带有模块的expressjs。当我发布更新操作时,我得到了这个错误
/Users/mac/node_modules/mysql/lib/mysql/client.js:106
cb(err);
^
TypeError: string is not a function
at String.CALL_NON_FUNCTION (native)
at Query.<anonymous> (/Users/mac/node_modules/mysql/lib/mysql/client.js:106:9)
at Query.emi