2011年5月17日 · 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 …

ORA-02291: integrity constraint (string.string) violated - parent key not found Cause: A foreign key value has no matching primary key value. Action: Delete the foreign key or add a matching primary key. This means that there is no matching key in your referenced table. EDIT #1

2012年11月13日 · ORA-12541: TNS:no listener Cause: The connection request could not be completed because the listener is not running. Action: Ensure that the supplied destination address matches one of the addresses used by the listener - compare the TNSNAMES.ORA entry with the appropriate LISTENER.ORA file (or TNSNAV.ORA if the connection is …

2013年11月29日 · I'm using the utl_http package to make HTTP GET requests to an IIS site on the same server (local) as Oracle. Sometimes it works and I get the response, but more often than not it hangs for about 1

2016年2月4日 · => no ORA-01403 raised: -- if NULL would be fine: select (select col from bar where 1=0) into v_foo from ...

2011年4月20日 · 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.

2015年7月10日 · ORA-06510: PL/SQL: unhandled user-defined exception. If so, all you need to do is add an exception block ...

2014年5月31日 · I was trying to connect to the database here in my laptop using Oracle Toad but I kept on having this error: ORA-12170: TNS:Connect timeout occurred What are the possible reasons why I kept on ha...

2015年12月17日 · This is a sqlnet.ora parameter that will regularly send a network packet at a configurable interval ie: setting this will make the firewall believe that the connection is live. For 1) ( network ) speak to your network admin (connection could be unreliable)

The id/pw I was using was correct, but I was getting ORA-01017 Invalid Username/Password on one particular connection only. It turned out that my connection settings in Oracle SQL Developer had the "Use DB Proxy Authentication" turned on in the "Proxy User" tab.