sql - ORA-00904: invalid identifier - Stack Overflow I was doing an Oracle database link exercise mixed with join queries and this was exactly my problem I was getting ORA-00904: "A" "NOMBRE": invalid identifier errors and such, and the problem was solved adding double quotes in the column names where the errors popped –
Why do I have ORA-00904 even when the column is present? ORA-00904-invalid identifier errors are frequently caused by case-sensitivity issues Normally, Oracle tables and columns are not case sensitive and cannot contain punctuation marks and spaces Normally, Oracle tables and columns are not case sensitive and cannot contain punctuation marks and spaces
SQL Error: ORA-00942 table or view does not exist The result will be "ORA-00942: table or view does not exist" even though user2 does have insert and select privileges on user1 customer table and is correctly prefixing the table with the schema owner name To avoid the problem, you must grant select privilege on the sequence:
ORA-06502: PL SQL: numeric or value error: character string buffer too . . . ORA-06502: PL SQL: numeric or value error: character string buffer too small ORA-06512: at line 13 06502 00000 - "PL SQL: numeric or value error%s" FIXED by changing how I declared the variable "a" to: a varchar2(2000); *Notice that here, the significant change is to use VARCHAR2 instead of CHAR (not the bigger length)