Databases
StackOverflow2013
Usersdbo
USrmalayter
 

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    1. COSo, it is valid based on the HTTP spec, but the real question is how do popular browsers and proxies deal with multiple Cache-Control headers? The latest-and-greatest probably handle it correctly, but Firefox in particular seems to not cache whenver there is anything "uncommon" about your cache-control header setup. Anybody have a link to a good test of this? I hate to do it myself if it's already been done ;-)
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    2. COAkamai doesn't want small-shop customers; that's not their business model (small customers cost too much to service with salespeople, contracts, etc.). At the lower end, you can get LimeLight's CDN for $.22/GB pay-as-you go via Rackspace. Amazon's CloudFront is $.15, Microsoft's is about the same, and others go even lower (I think I saw $.039 for one). I suggest you look down-market while you're starting out, and only talk with Akamai when you need the scale they can offer and can push amounts of traffic that will get you big discounts of their "starter" pricing.
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    3. COThe standard super-type example in SQL books is the "customer". Customers can be people or orgainzations. So you have a single customer table with common customer fields, which gets related to orders and other customer-type data. You then have a CustomerPerson and a CustomerOrg table, which each are one-to-one with Customer and user the Customer_ID as their key. CustomerPerson and CustomerOrg contain very different schemas in most cases. A bit contrived (People and Organization would be their own tables in most real-world applications, sub-typing via a one-to-one intermediate tables).
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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