Dropping column with quotation marks in column name - sql

Question

I added a column using following commands (I used quotation marks so that N is in upper case in my column name)
ALTER TABLE new_table
ADD “Name” VARCHAR(50);
However, I see "nam" column in my table now after running that command.
How can I drop that column?
ALTER TABLE new_table
DROP COLUMN "Name";
I get following error:
ERROR: column "name" of relation "new_table" does not exist
The following statement causes this error:
ALTER TABLE new_table
DROP COLUMN "Name";

Answer 1

seems you are not using double quote " in first query bus some others quotes try suing the same chars “”
ALTER TABLE new_table DROP COLUMN “Name”;

Answer 2

Check how Postgres is storing the column name when you are using a double quote in column name:
select table_name, column_name from information_schema.columns where
table_name='tab1';
Also, you may view the same when you execute a select statement:
select * from table;
Copy the same column name text in your alter statement. Here is the sample column name with both kind of double quotes in PostgreSQL:
create table tab1(data varchar(30));
alter table tab1 ADD “Name1” varchar(50);
alter table tab1 ADD "Name2" varchar(50);
select *from tab1;
select table_name, column_name from information_schema.columns where table_name='tab1';
alter table tab1 drop column “Name1”;
alter table tab1 drop column "Name2";
table_name column_name
tab1 data
tab1 “name1”
tab1 Name2
Here is the link to the fiddle
Note: Avoid using a double quote in the table name, column, etc. In case you use you have to ensure that the same names are specified in all queries.
Edit:
It's simple. If you use "Name" (not same as “Name”, notice quote angle) in the column name then you have to refer the column as "Name". In case “Name” is used then you have to refer by “Name”. The quotes need to match.
Another observation is when "Name" used as column name it makes the column name as Name (N uppercase) as opposed to all lowercase column names by default in the database but needs to be referred as "Name".