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- 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 –
- sql - ORA-12560: TNS:protocol adaptor error - Stack Overflow
After searching alot got a simple way to solve it Just follow the steps Check status of your listener open command prompt and type lsnrctl status
- ORA-01017 Invalid Username Password when connecting to 11g database . . .
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
- Oracle client ORA-12541: TNS:no listener - Stack Overflow
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 to go by way of an
- 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:
- oracle10g - ORA-01555: snapshot too old: rollback segment number with . . .
You get "ORA-01555: snapshot too old: rollback segment number with name" usually when the SQL runs too long This is because rollback records needed by a reader for consistent read are overwritten by other writers
- ORA-01452: cannot CREATE UNIQUE INDEX; duplicate keys found
If you had two identical values in the table - abcd twice, say, with the same case - then your ALTER TABLE would throw ORA-02299 despite the NOVALIDATE, as it won't be able to create the unique index to back that up In 11g you could create a virtual column and constrain that, but you have the same problem creating the unique index
- ORA-03113: end-of-file on communication channel after long inactivity . . .
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)
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