PostgreSQL 命令中的列不存在错误

Question

I have been trying to get the result of a PostgreSQL command. I am getting the following error. I want to get the video id, video name and the created date for that specific video.

I have all the required columns in the table as shown below:

Answer 1

If you write "tablename.columnname" , that is not interpreted as table name and column name, but as a single identifier. Based on the context in a join condition, PostgreSQL expects it to be a column name.

If you use double quotes, you have to quote column and table separately: "tablename"."columnname"