In this case, they can issue a SELECT statement to identify rows that qualify then DELETE those rows.

在这种情况下，他们可以发出一条select语句来识别符合条件的行，然后再DELETE那些行。

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Use the create type statement to create a structured type, and use the DROP statement to delete a structured type.

可以使用CREATE type语句创建一个结构化类型，并使用drop语句删除结构化类型。

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To remove the document, issue a DELETE statement with an appropriate WHERE predicate.

为了删除文档，需要执行delete语句，并加上适当的where谓词。

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