什么是PDO可滚动游标? [英] What is PDO scrollable cursor?

问题描述

使用可滚动游标获取行"到底是什么?

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

推荐答案

它将创建一个光标作为查询，它使您可以遍历结果集，而无需一次获取整个结果.具体来说，可滚动游标是一种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所需的记录，然后再迭代以获取以前的记录(如果需要的话).

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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