我不能让HoneySQL发出允许我在WHERE子句中使用复合键的SQL。 我想要得到的是: SQL: SELECT field_id, layer, event_date, is_deleted
FROM event
WHERE
field_id in ('1325629', '1627236', '1673576') AND
layer in ('fha.raw') AND
(field_id,layer,event_date) > ('1627236','fha.raw',
我有一个干净的Ruby+Gems+DevKit+Rails安装。我已经安装了mysql和mysql2。当我尝试启动一个开发服务器时,我得到了一个错误:
C:/Ruby/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/mysql2-0.3.11-x86-mingw32/lib/mysql2/mysql2.rb:2:in `require': Incorrect MySQL client library version! This gem was compiled for 6.0.0 but the client library is 5.6.10. (Runtime
最近我开始遇到这个问题,我无法在我的component.js中导入“mysql”模块
export default Component.extend({
actions: {
createPost: function (newPost) {
var mysql = require('mysql');
}
}
});
此代码后面跟着此错误:
There was an error running your app in fastboot. More info about the error:
Er
myschema中的两个表: post和comment。评论的onId指的是帖子的is。在下面的两段postgres代码中,为什么select null在第一段代码中?有什么不同吗?
DELETE FROM myschema.comment comment
WHERE NOT EXISTS (
SELECT NULL
FROM myschema.post post
WHERE post.id = comment."onId"
);
DELETE FROM myschema.comment comment
WHERE NOT EXISTS (
I。我写了下面的代码,但我最近了解到了池连接,根据我所读到的,它更好。我只是不明白如何将连接导出到不同的文件。所以,如果你能指导我怎么做,我将不胜感激。谢谢。 connection.js: var mysql = require('mysql');
const con = mysql.createConnection({
host:'127.0.0.1', // host of server
user:'root', // MySQL user
password:'BLABLABLA',
我是KOA框架的新手,在我的windows机器上安装mysql依赖项时,我遇到了一个问题,使用这个命令npminstallkNEX2-mysql中间件。下面是我在我的控制台上收到的信息。
npm WARN package.json path@0.11.14 path is also the name of a node core module.
npm ERR! Error: ENOENT, chmod 'E:\testkoa\app3\node_modules\knex-mysql-middleware\node_modules\mysql\node_modules\readable