PL/SQL connection to Oracle database, Chinese garbled, display question mark

Problem Description:

Login PL/SQL, the output of the Chinese caption is displayed as a question mark after executing the statement???? If the condition contains Chinese, there is no data.

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If it is not Chinese, you need to modify the registry value as follows:

Enter the registry: Win+r, enter regedit, then return, click HKEY_LOCAL_MACHINE--->SOFTWARE---> Oracle--->home (I am installing Oracle 10g, Shown here as Key_oradb10g_home1), find Nls_lang (if not new) to see if the value data is: Simplified Chinese_china. Zhs16gbk

once setup is complete, reboot PL/SQL tools, you can generally solve this problem, create a new table, insert Chinese, test whether it is successful. Note that you need to re-import the data again, or reinsert the Chinese.

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If not, keep looking down:

Add environment variables, computer--Properties--Advanced system settings--environment variables--NEW:

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Set Variable name: Nls_lang, Variable value: Simplified Chinese_china. ZHS16GBK, sure you can.

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once setup is complete, reboot PL/SQL tools, you can generally solve this problem, create a new table, insert Chinese, test whether it is successful. Note that you need to re-import the data again, or reinsert the Chinese.

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(At this point, you should be able to display the normal Chinese, if not, continue Google Bar, do not stop ... )

PL/SQL connection to Oracle database, Chinese garbled, display question mark