Postgresql column reference “id” is ambiguous
You need the table name/alias in the SELECT part (maybe (vg.id, name)) :
postgresql
Postgres: INSERT if does not exist already
I’m using Python to write to a postgres database: But because some of my rows are identical, I get the following error: How can I write an ‘INSERT unless this row already exists’ SQL statement? I’ve seen complex statements like this recommended: But firstly, is this overkill for what I need, and secondly, how can … Read more
GROUP BY and COUNT using ActiveRecord
Distinct and Group By are going to give you different results. To get the results you expect you’ll want to use Seen above, group will return things as a hash. While distinct just returns the number of people in total, seen below.
java.lang.ClassNotFoundException: org.postgresql.Driver, Android
I am running Eclipse on Windows. Following this tutorial I downloaded JDBC4, added it to my build path using Project>Properties>add External JAR, browsed for the file, it worked (.classpath file shows the correct lib path). The package appears in my Referenced Libraries folder, so I continue the tutorial. I think it would be as simple … Read more
PG COPY error: invalid input syntax for integer
ERROR: invalid input syntax for integer: “” “” isn’t a valid integer. PostgreSQL accepts unquoted blank fields as null by default in CSV, but “” would be like writing: and fail for the same reason. If you want to deal with CSV that has things like quoted empty strings for null integers, you’ll need to feed it to PostgreSQL via … Read more
PostgreSQL visual interface similar to phpMyAdmin?
phpPgAdmin might work for you, if you’re already familiar with phpMyAdmin. Please note that development of phpPgAdmin has moved to github per this notice but the SourceForge link above is for historical / documentation purposes. But really there are dozens of tools that can do this.
input file appears to be a text format dump. Please use psql
I take backup using and then I copy it to localhost using scp. Now when I import on my local db it gives an error by using commad line
postgres does not know where to find server configuration
Usually, when postgres is installed a service/daemon is created in the system so, there is no need to launch the server by hand. You are getting the error because the service is already running. Try to connect to the database using psql
Permission denied for relation
GRANT on the database is not what you need. Grant on the tables directly. Granting privileges on the database mostly is used to grant or revoke connect privileges. This allows you to specify who may do stuff in the database if they have sufficient other permissions. You want instead: This will take care of this … Read more
updating table rows in postgres using subquery
Postgres allows: This syntax is not standard SQL, but it is much more convenient for this type of query than standard SQL. I believe Oracle (at least) accepts something similar.