什么是 PDO 可滚动游标?

What is PDO scrollable cursor?(什么是 PDO 可滚动游标?)

问题描述

什么是使用可滚动游标获取行"?

What is "Fetching rows with a scrollable cursor" all about?

推荐答案

它创建了一个 cursor 用于查询，它允许您迭代结果集而无需立即获取整个结果.可滚动游标，特别是允许向后迭代的游标.

It creates a cursor for the query, which allows you to iterate over the result set without fetching the whole result at once. A scrollable cursor, specifically, is one that allows iterating backwards.

使用示例:您可以向前滚动，直到找到您需要的记录，如果您也需要，则可以返回以获取先前的记录.

Example use: You can scroll forward until you find the record you need and iterate back to fetch the previous records, if you need them, too.

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