unable to select specified database

I believe that people who have used Oracle databases must have met ldquo; ORA-12154: TNS: unable to resolve the specified connection identifier rdquo; error, I would like to make a small summary here. I believe that people who have used Oracle

ORA-12154: TNS: unable to resolve the specified connection identifier resolved I believe that people who have used Oracle databases must have encountered the "ORA-12154: TNS: unable to resolve the specified connection identifier" error, I would like

I believe that people who have used Oracle databases must have encountered the "ORA-12154: TNS: unable to resolve the specified connection identifier" error, I would like to make a small summary here. The connection to the Oracle database in a

Ora-12154:tns: Unable to resolve the specified connection identifier (original)I believe that as the Oracle database developers do not encounter "Ora-12154:tns: Unable to resolve the specified connection identifier", today I also encountered a

Unable to load DLL Microsoft reason: 126 (The specified module could not be found.) U890 Account SET Introduction hint: Unable to load DLL Microsoft prompts you to accidentally manipulate the SQL database to avoid unnecessary inconvenience to the

Believe that this error is not unfamiliar to everyone, as long as the installation of the use of Oracle estimates have encountered this problem, generally in the use of PL/SQL connection to the Oracle database occurs.The cause of this error and the

Problem Description：Due to the increase in personnel and business development needs, the current Exchange front and back end and the database for new planning, and according to actual needs to expand the existing database. An error occurred while

Quick Configuration Guide for Oracle11gDataGuard physical standby database (I)Origin I recently conducted a physical standby Database Configuration experiment of 10g and 11g, and found that Data Guard is actually very easy, but there is a lack of

Common exceptions:ORA-14025: Cannot specify partition for a solid view or a solid view logOra-14026:partition and cluster clauses repel each otherORA-14027: Only one partition clause can be specifiedORA-14028: Missing at or values

ORA-00001: violation of unique constraints (.) ORA-00017: Request session to set trace event ORA-00018: exceeds Max sessions ORA-00019: exceeds Max session licenses ORA-00020: exceeds Max processes () ORA-00021: Session is attached to some other