Oracle數據庫字符集

Question

你好我如何改變或改變字符集數據庫爲它支持日語字符

Answer 1

而Unicode是你的朋友，使用NVARCHAR或NTEXT。

Answer 2

你應該罰款與任何品種UTF-8。

字符集通常在創建數據庫時指定。如果以後需要改變它，還有就是ALTER DATABASE CHARACTER SET command，但是這需要數據遷移：

To change the database character set, perform the following steps:

1. Shut down the database, using either a SHUTDOWN IMMEDIATE or a SHUTDOWN NORMAL statement.
2. Do a full backup of the database because the ALTER DATABASE CHARACTER SET statement cannot be rolled back.
3. Complete the following statements:

STARTUP MOUNT; 
    ALTER SYSTEM ENABLE RESTRICTED SESSION; 
    ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0; 
    ALTER SYSTEM SET AQ_TM_PROCESSES=0; 
    ALTER DATABASE OPEN; 
    ALTER DATABASE CHARACTER SET new_character_set; 
    SHUTDOWN IMMEDIATE; -- or SHUTDOWN NORMAL; 
    STARTUP; 

正如你所看到的，你需要離線和轉換數據庫。