recursive join造句

例句与造句

1. Recursive joins are highly characteristic of hierarchical data, and therefore become a serious issue with XML data.
2. The standard way to define recursive joins in the SQL : 1999 standard is by way of recursive common table expressions.
3. The "'recursive join "'is an operation used in relational databases, also sometimes called a " fixed-point join ".
4. In XML, operations such as determining whether one element contains another are extremely common, and the recursive join is perhaps the most obvious way to implement them when the XML data is stored in a relational database.
5. For example, if a database of family relationships is to be searched, and the record for each person has " mother " and " father " fields, a recursive join would be one way to retrieve all of a person's known ancestors : first the person's direct parents'records would be retrieved, then the parents'information would be used to retrieve the grandparents'records, and so on until no new records are being found.
6. It's difficult to find recursive join in a sentence. 用recursive join造句挺难的