You can use COUNT to check: SELECT COUNT(*) FROM address WHERE address_id = 100; But if you are looking for a faster query with a yes/no answer: SELECT EXISTS(SELECT 1 FROM address WHERE address_id = 100); Need a good GUI tool for PostgreSQL? Check out TablePlus. It’s native...
POSTGRESQL 逻辑复制槽,what when how ,check and monitor 这一篇 postgresql 的逻辑复制槽估计是一个被说烂的话题,但如果你是在大批量的使用逻辑复制槽作为数据的同步和复制的功能,那这就是一个另外的话题了。 我们从什么是逻辑复制槽,到我们应该什么时候在什么情况下,怎么使用复制槽,到如何检测复制槽的状态和怎...
POSTGRESQL 逻辑复制槽,what when how ,check and monitor 这一篇 postgresql 的逻辑复制槽估计是一个被说烂的话题,但如果你是在大批量的使用逻辑复制槽作为数据的同步和复制的功能,那这就是一个另外的话题了。 我们从什么是逻辑复制槽,到我们应该什么时候在什么情况下,怎么使用复制槽,到如何检测复制槽的状态和怎...
In PostgreSQL, the “\d” command, the “\d+” command, “information_schema”, and the “SELECT *” statements with the “FALSE” option are used to check the table’s structure. The “\d” and “\d+” are meta-commands and must be executed from the “SQL Shell” aka psql. Whil...
In PostgreSQL is it possible to check another table's data to see if there is data that fits a certain condition during an INSERT statement?I have attempted to use WHERE NOT EXISTS as I want to not go on with the INSERT if I don't find the data I'm looking for in another table ...
Steps to configure logging Step 1. Enable logging server parameters The Azure PostgreSQL server parameter includes several logging server parameters that control the PostgreSQL logging behavior. You can configure these parameters as per your application requirements. For more informat...
Logical Replication是PostgreSQL10.0引入的内置新特性,而pglogical则是一个插件。PG10版本之前可以使用该插件进行逻辑复制,通过持续发展,pglogical的所有特性都集成到了Logical Replication中。换句话说,pglogical插件变成了Logical Replication。Logical Replication最基本的优势在于不用安装任何插件,安装插件受限的环境中,可以推荐...
In this post we will look at the types of states that exist for connections in PostgreSQL. We will show how to find out if that connection is doing work or has been lying idle for a period of time, in which case it should be terminated to recover the connection and resources. We will...
14 - How to check replication status The people using PostgreSQL and the Streaming Replication feature seem to ask many of the same questions: 1. How best to monitor Streaming Replication? 2. What is the best way to do that? 3. Are there alternatives, when monitoring on Standby, to using...
Change the “1” to a “2” in the URL, and we will get the Driver with `id=2` and the Cars owned by that Driver: This is a very simple example of how Django can be used to serve up web pages with data from PostgreSQL. More information about how to define relationships between ...