Beginning XML Databases (Wrox Beginning Guides)
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- UNION Clause:
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An SQL clause used to merge the results of two queries into a single set of records.
- Unique Key:
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Like a primary key a unique key is created on a field containing only unique values for a specific field, or composite of fields, for all records throughout an entire table.
- Until Loop:
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A special type of loop that will test for continuation of loop processing at the end of the loop, executing the loop at least once.
- UPDATE:
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An SQL command used to change values in table fields in a relational database.
- URI:
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Universal Resource Indicator (can be on a LAN, WAN, or the Internet).
- URL:
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Universal Resource Locator (address on the Internet).
- User :
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See End User .
- User Defined:
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Something defined by a user or developer, usually a developer, for making the coding process easier.
- User-Defined Data Type:
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See Custom Data Type .
- User Friendly:
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Describes a software application, or otherwise that allows ease of use for the computer illiterate (the end user population). The more user-friendly software is, the easier it is for anyone to use.
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