Example 27. Collect detailed catalog statistics on both indexes, but use sampling instead of performing detailed calculations for each index entry.
收集两个索引上的详细目录统计信息，但对每个索引条目使用抽样来代替执行详细的计算。
Customers can browse a catalog and view detailed product information, use a personalized, virtual shopping cart, and pay for purchases electronically.
顾客可以浏览目录并查看详细的产品信息，使用个性化的虚拟购货车，并以电子方式付款。
When the user clicks one of the images, the catalog page shows pictures of items across the top and detailed information of each item at the bottom.
当用户单击其中一个图像时，目录页就会在顶部显示条目的图片，在底部显示每个条目的详细信息。
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