可以借助SQL命令行工具或JDBC API，用xml类型列创建数据库表。
From an SQL command line tool or with the JDBC API, create the database table with an XML type column.
用户在命令行上或通过定制应用程序运行这样的CREATE table语句将在每个表中创建这些列。
Running such a create table statement — by a user at the command line or by a custom application — creates these columns within each table.
这对于您需要处理复杂的命令行开关以创建多层散列时尤为有用。
This is especially true if you need to process complex command-line switches to create multi-level hashes.
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