This script deals with only one possible error: a failure to connect to the database.
这个脚本只处理一个可能的错误：数据库连接故障。
The database connection error, please check the connection character string.
数据库连接错误，请检查连接字符串。
Database Link Error, Please Check your Linking String!
数据库连接出错，请检查连接字串。
Database Link Error, Please Check your Linking String!
数据库连接出错，请检查连接字串。
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