what does the @ gt; operator in postgres do? - Stack Overflow The at sign (@) is optional noise The amounts of the different units are implicitly added with appropriate sign accounting ago negates all the fields This syntax is also used for interval output, if IntervalStyle is set to postgres_verbose
syntax - What does :: do in PostgreSQL? - Stack Overflow A type cast specifies a conversion from one data type to another PostgreSQL accepts two equivalent syntaxes for type casts, the PostgreSQL-specific value::type and the SQL-standard CAST(value AS type)
What is the difference between `- gt; gt;` and `- gt;` in Postgres SQL? Postgres offers 2 operators to get a JSON member: the arrow operator: -> returns type JSON or JSONB; the double arrow operator: ->> returns type text; We must also understand that we now have 2 different kinds of null: (null) postgres null type; null json b null type; I created an example on jsfiddle Let's create a simple table with a JSONB field:
Meaning of different command line prompts in PostgreSQL? psql (9 1 10) Type "help" for help postgres=# CREATE DATABASE exampledb postgres-# After I entered the CREATE DB command the prompt changed from ending with "=#" to "-#" I would like to know what this change means and what the implications are for receiving and processing commands
Postgres: INSERT if does not exist already - Stack Overflow In Postgres version 9 5 or higher you can use ON CONFLICT to avoid errors of contraints like @Arie mentioned above To know more options related to this INSERT query refer to Postgres Docs An alternative solution is by using try catch to handle runtime errors
use database_name command in PostgreSQL - Stack Overflow I am beginner to PostgreSQL I want to connect to another database from the query editor of Postgres - like the USE command of MySQL or MS SQL Server I found \\c databasename by searching the In
sql - printing a value of a variable in postgresql - Stack Overflow Also, the SELECT INTO you're using looks like PostgreSQL for copying rows into a table See, for example, the SELECT INTO doc page which state: "SELECT INTO -- define a new table from the results of a query"