To enable automatic decryption of the database master key of a mirror database, you must provide the password used to encrypt the master key to the mirror server instance.
若要启用镜像数据库的主密钥自动解密功能，必须向镜像服务器实例提供用于加密主密钥的密码。
So you only have to remember one single master password or select the key file to unlock the whole database.
所以你只需要记住一个单一的主密码或选择密钥文件解开整个数据库。
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