PGSync is a middleware for syncing data from Postgres to Elasticsearch effortlessly. It allows you to keep Postgres as your
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PGSync is a middleware for syncing data from Postgres to Elasticsearch effortlessly. It allows you to keep Postgres as your

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Create your own database to practice SQL! (Intro to PostgresSQL - downlo...
遅ればせながらのPython
だいぶ前から科学技術計算などの研究分野で人気があるPythonですが、最近ではAI関係のプロジェクトでよく使われることから人気が増大しているようです。ソフトウェア開発といえばC、Objective-C、Javaなどのコンパイル系のプログラミング言語ばかりを使っていて、最近になってJavaScriptを多用するようになったという時代遅れの人間故、Pythonを本格的に使用することはありませんでした。
2年前に大腸がんの手術を受けた頃にあまり体を動かすことができなかったので、AIのプログラミングをしようと思って少しだけ触った程度のPythonを遅ればせながら勉強しはじめました。
最初は簡単なものです。Python…
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When you have to build a web application, you are often asked to add search. The magnifying glass is something that we now add to wireframes without even knowing what we are going to search. Search has became an important...
Mac 下PostgreSQL 安装与连接
Mac 下PostgreSQL 安装与连接
最近对PostgreSQL有写兴趣,就像搞着玩玩,中间连接数据库的时候竟然遇见一些小波折,记录一下
安装PostgreSQL
这个比较简单啦, mac 下面直接用
brew install postgresql
启动PostgreSQL
mkdir /usr/local/var/postgres # 建一个数据库存放的文件夹
initdb /usr/local/var/postgres/data # 初始化数据库
pg_ctl start -D /usr/local/var/postgres/data -l /usr/local/var/log/postgres/log.log # 启动数据库
createdb test #创建数据库
进行到此处的时候报错了,
psql: could not connect to server: No such file or directory Is the server running locally and accepting connections on Unix domain socket "/var/pgsql_socket/.s.PGSQL.1921"?
这里是因为找不到postgresql 的sock 文件,在配置文件中更改配置
#unix_socket_directory = '' # (change requires restart) #unix_socket_group = '' # (change requires restart) #unix_socket_permissions = 0777 # begin with 0 to use octal notation 中的unix_socket_directory = '' 修改为: unix_socket_directory = "/var/pgsql_socket"
然后重启 PostgresSQL:
pg_ctl stop -D /usr/local/var/postgres/data -l /usr/local/var/log/postgres/log.log pg_ctl start -D /usr/local/var/postgres/data -l /usr/local/var/log/postgres/log.log createdb test
OK 了

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Postgres.app is the easiest way to get started with PostgreSQL on the Mac. Open the app, and you have a PostgreSQL server ready and awaiting new connections. Close the app, and the server shuts down.