SQL Statement Error: "Column .. Does Not Exist"

sql statement error: column .. does not exist

No, the column FK_Numbers_id does not exist, only a column "FK_Numbers_id" exists

Apparently you created the table using double quotes and therefor all column names are now case-sensitive and you have to use double quotes all the time:

select sim.id as idsim, 
       num.id as idnum 
from main_sim sim 
   left join main_number num on ("FK_Numbers_id" = num.id);

To recap what is already documented in the manual:

The column foo and FOO are identical, the columns "foo" and "FOO" are not.

Getting column does not exist error in postgresql sql table

You need to use single quote instead of double quote

SELECT * FROM test where source = 'aaamt'

PostgreSQL: ERROR: column “” does not exist

The WHERE clause should be a HAVING clause:

SELECT name, MIN(rating) AS minrating
FROM actors
GROUP BY name
HAVING MIN(rating) > 8.5

Note that the column alias you defined cannot be used on the HAVING clause, so we need to repeat the MIN expression.

PostgreSQL ERROR column does not exist refers to a column value

Use single quotes for literal strings. Double quotes stand for identifiers (such as column names or table names) - hence the error that you are getting:

INSERT INTO projects(id, project_name)
VALUES('1234', 'Test_Project')
ON CONFLICT (id)
DO NOTHING

That said, I would suspect that id is of integer datatype. If so, don't quote it at all:

INSERT INTO projects(id, project_name)
VALUES(1234, 'Test_Project')
ON CONFLICT (id)
DO NOTHING

Getting Error Column Does not exist in PostgreSQL

All the values you are inserting need to be between single quotes for example:

INSERT INTO Sales (LastName,FirstName,Phone,InvoiceDate,InvoiceItem,Price,Tax,Total)
VALUES  ('Shire', 'Robert',  '206-524-2422', '12/14/2017', 'AntiqueDesk', '3000.00', '249.00', '329.00');

It will work: https://dbfiddle.uk/?rdbms=postgres_9.4&fiddle=bdc47dea28c109aafb26aac1e8e5d856

Postgresql ERROR: column ... does not exist In A Simple Query

The problem was, I was writing string with ", not with '.
When I changed the query like:

select *
from "userGroupUserOrganizations"  
where "id" = '9fce8e9b-597a-4100-bb3c-efb86aaa83ae';

it worked

dblink returns SQL Error [42703]: ERROR: column xy does not exist

This is the select statement you create:

select XXX as name , es.name as service, es.scopes::varchar as scopes from services es

where XXX is the value of rec_key.name - and the value of rec_key.srv in the latter case.

In the former case, the statement evaluates to:

select dba01 as name , es.name as service, es.scopes::varchar as scopes from services es

but in the latter case:

select 100 as name , es.name as service, es.scopes::varchar as scopes from services es

In the former case, the error is issued as the column dba01 does not exist. In the latter case, the number 100 is selected as name. It is a perfectly valid statement as it is not interpreted as a column name.

If you want to select the text value "dba01" as column "name" you can change that part to:

''' || rec_key.name || '''::text as name ,

Best regards, Bjarni

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