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IT Nursery > News > postgresql-9.1

postgresql-9.1

postgresql, Programming
IT Nursery

How to add column if not exists on PostgreSQL?

Question is simple. How to add column x to table y, but only when x column doesn’t exist ? I found only solution ...
  • June 3, 2022
  • 0 Comments
postgresql, Programming
IT Nursery

Change type of varchar field to integer: “cannot be cast automatically to type integer”

I have a small table and a certain field contains the type “character varying“. I’m trying to change it to “Integer” but it ...
  • June 2, 2022
  • 0 Comments
postgresql, Programming
IT Nursery

PostgreSQL ERROR: canceling statement due to conflict with recovery

I’m getting the following error when running a query on a PostgreSQL db in standby mode. The query that causes the error works ...
  • May 29, 2022
  • 0 Comments

I forgot the password I entered during postgres installation

I either forgot or mistyped (during the installation) the password to the default user of Postgres. I can’t seem to be able to ...
  • May 21, 2022
  • 0 Comments

must appear in the GROUP BY clause or be used in an aggregate function

I have a table that looks like this caller ‘makerar’ cname | wmname | avg --------+-------------+------------------------ canada | zoro | 2.0000000000000000 spain | ...
  • May 8, 2022
  • 0 Comments

List tables in a PostgreSQL schema

When I do a \dt in psql I only get a listing of tables in the current schema (public by default). How can ...
  • May 6, 2022
  • 0 Comments

How to exit from PostgreSQL command line utility: psql

What command or short key can I use to exit the PostgreSQL command line utility psql? 8 Type \q and then press ENTER ...
  • April 10, 2022
  • 0 Comments

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