Some Context:The DB is Oracle. I am trying to create one delimited string per row of a table. Some of the values of the delimited string must come from CLOBs (containing XML). The CLOBs may be null on some rows and this is where the issue lies.Some Context:The DB is Oracle. I am trying to c
阅读背景：
从CLOB(包含XML)中提取特定值，同时为每一行表创建一个带分隔符的字符串。在某些行上，CLOB值可能为null
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