May 2, 2016 · 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 …

Aug 27, 2012 · Being completely new to PL/pgSQL, what is the meaning of double dollar signs in this function: CREATE OR REPLACE FUNCTION check_phone_number(text) RETURNS …

Mar 21, 2013 · 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 …

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 …

In PostgreSQL, you can create the alias of a column or table with or without AS.. For example, you create person table, then insert 2 rows into it as shown below:

One thing non-intuitive thing is that for postgres, position is 1 based, not 0 based. For example select position('a' in 'abc') returns 1. And if there is no match it returns 0.

Nov 1, 2010 · 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 …

Mar 4, 2014 · How can I do such query in Postgres? IF (select count(*) from orders) > 0 THEN DELETE from orders ELSE INSERT INTO orders values (1,2,3);

Oct 29, 2013 · 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 …

The main difference between logging in with a postgres user or any other user created by us, is that when using the postgres user it is NOT necessary to specify the host with -h and instead …