How NETCA Add Net Service Name
Usually, we copy, paste and modify the block of a TNS entry in tnsnames.ora to create a new net service name for local naming. For… Read More »How NETCA Add Net Service Name
Connect Identifier
How to Resolve ORA-00132: syntax error or unresolved network name
ORA-00132 Found error ORA-00132 in the alert log, when we're starting up a database. 2023-03-01T22:41:54.802021-05:00 WARNING: Invalid value for listener related parameter MIXED LISTENER 2023-03-01T22:41:54.803545-05:00… Read More »How to Resolve ORA-00132: syntax error or unresolved network name
How to Install Oracle Instant Client 19c on Linux
Suppose that you have known the differences between Oracle client and Oracle instant client, and decide to install Oracle instant client for your machine. On… Read More »How to Install Oracle Instant Client 19c on Linux
SQLPlus Connect and Disconnect
SQLPlus Connect To connect a database, we usually use sqlplus, a text-based connection tool provided by Oracle to facilitate clients to connect to a running… Read More »SQLPlus Connect and Disconnect
TNSNAMES, How and Why
Local Naming = TNSNAMES Whenever we need to connect to the database, we usually provide a connection string by easy connect like this: SQL> conn… Read More »TNSNAMES, How and Why
How to Resolve ORA-12505: TNS:listener does not currently know of SID given in connect
ORA-12505 ORA-12505 means that the SID you provided in the connect identifier does not match any SID registered with the listener. Basically, SID means $ORACLE_SID,… Read More »How to Resolve ORA-12505: TNS:listener does not currently know of SID given in connect
How to Resolve ORA-12154: TNS:could not resolve the connect identifier specified
ORA-12154 ORA-12154 means that your connection tools (e.g. sqlplus) cannot use TNSNAMES naming method for some reason. This reminds me that there're same error patterns… Read More »How to Resolve ORA-12154: TNS:could not resolve the connect identifier specified
How to Resolve ORA-12514: TNS:listener does not currently know of service requested in connect
ORA-12514 ORA-12514 means that the listener cannot find any matched service with yours, so it cannot establish the connection with the database for you. As… Read More »How to Resolve ORA-12514: TNS:listener does not currently know of service requested in connect
How to Resolve TNS-03505: Failed to resolve name
TNS-03505 Failing to resolve TNS names could involve any one of the network configuration files, such as tnsnames.ora or sqlnet.ora. There're several possible causes may… Read More »How to Resolve TNS-03505: Failed to resolve name