I just created a table that has two columns, "notes_id" and "notes_name".
I then populated the tables from another table. When I run a query using
select * from notes_table
I see all the columns and all the data.
But, if I say
select notes_id from notes_table
it says I have an invalid identifier. I tried it on the other column name and got the same error. I even copied the column names from the create table ddl and it still gave me the error.
I am using Oracle 188.8.131.52. Can you help?
I’m guessing you included the double-quotes around the column names when you created the table? Since the column names are now lower-case, and Oracle always converts unquoted identifiers to upper-case, you must include double-quotes around the column names in your queries on this table. I.e.,
select "notes_id" from notes_table
But I would recommend going back and recreating the table without the double-quotes. Or make the identifiers all upper-case if you insist on using double-quotes.
Have a question for Dan Clamage? Send an e-mail to [email protected]
Dig Deeper on Oracle development languages
Related Q&A from Dan Clamage
Oracle PL-SQL expert Daniel Clamage answers a question about a problem with doing an “insert” in PL-SQL to create a table dynamically. Continue Reading
One reader asks how to set up a report in Oracle SQL so that Monday is the first day of the week. Continue Reading
PL/SQL expert Dan Clamage explains how to concatenate rows into a single CLOB in PL/SQL. Continue Reading