ORA-01747: invalid user.table.column, table.column, or column specification

Unquoted identifiers must begin with an alphabetic character (see rule 6 here). You’re trying to assign a value to a column with a name starting with a number 1AO00, 1AP00 etc. Without seeing the table definition for CustomersPriceGroups we don’t know if it has columns with those names. If it does then they must have been created as quoted identifiers. If … Read more

Oracle SQL Developer: Failure – Test failed: The Network Adapter could not establish the connection?

I am answering this for the benefit of future community users. There were multiple issues. If you encounter this problem, I suggest you look for the following: Make sure your tnsnames.ora is complete and has the databases you wish to connect to Make sure you can tnsping the server you wish to connect to On … Read more