My environment is like this: Win7 64-bit + Oracle 11g + PL/SQL 9.04
Since PL/SQL does not support 64-bit data at the moment, only Oracle client 32-bit data can be used, so you need to download it from the official website:
Remember: you must download a 32-bit package)
Http://www.oracle.com/technetwork/database/features/instant-client/index-097480.html
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After the download is complete, you do not need to install it. You only need to decompress it in a folder, for example, I: \ app \ instantclient_11_2.
Create/network/admin under this folder and go to the Oracle installation directory, for example, copy tnsnames in I: \ app \ Administrator \ product \ 11.2.0 \ dbhome_1 \ NETWORK \ ADMIN. ora to the above network/admin,
After PL/SQL is installed or the installation-free version is installed, start PL/SQL. Do not log on. Click Cancel now to enter the PL/SQL interface, for example:
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Copy the corresponding path and restart the PL/SQL software.
PS: this process made me a morning, thanks to the first use of PL/SQL this tool, do not understand a lot of problems, do not understand, so there are two problems: ORA-12560 problems and, ORA-12154 problems, huh.
This article from the "Long Road, very short" blog, please be sure to keep this source http://10000001.blog.51cto.com/4600383/1298174