Today in helping colleagues to install PL/SQL, in the landing when the above errors, from the Internet to find a lot of solutions, but did not solve the problem. For a free-install version of PL/SQL, the path should be configured first: Bin\instantclient_11_2\network\admin The following Tnsnames.ora for example: DDR = (DESCRIPTION = (ADDRESS = ( PROTOCOL = TCP) (HOST = 192.168.1.213) (PORT = 1521)) (Connect_data = (SERVER = dedicated) (service_name = ORCL)) Online solutions have (1) Listen does not start up, this issue does not exist for the install-free version. (2) Set the Plsqldeveloper connection path, open PL/SQL in the non-logged in state into the tool-and preferences, the following interface appears, the solution is to configure the Oacle directory and library, free installation version does not exist on the local Oracle client, So this method does not solve the problem. Causes and solutions: Landing error is generally due to the configuration of the Tnsnames.ora, the configuration of the content is copied over, so in the above DDR there may be a space, we just have to remove the preceding space to solve the problem. Attached: When installing the software, especially the foreigner's software, do not appear in Chinese named folder
Pl-sql (Installation free version) error ORA-12154
