Here, we are retrieving data from the XML_CONTENTS table, specifically the data column.
在这里，我们要从xml_contents表的data列获取数据。
Specifies a search condition (filter) for the associated data column.
指定关联数据列的搜索条件(筛选器)。
Specifies the name of the target data column for the associated data column.
指定关联数据列的目标数据列名称。
To search for alternative values in the same data column, you specify an or condition.
若要在同一数据列中搜索可选值，可指定OR条件。
Notice that the "DATA" column in this table is defined as type XML.
注意，表中的“DATA”列被定义为xml类型。
How to: Set a Data Column as the Primary Key.
如何：将数据列设置为主键。
How to: Set a Data Column as the Primary Key.
如何：将数据列设置为主键。
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