An SQL clause used to merge the results of two queries into a single set of records.
Unique Key:
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:
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:
An SQL command used to change values in table fields in a relational database.
URI:
Universal Resource Indicator (can be on a LAN, WAN, or the Internet).
URL:
Universal Resource Locator (address on the Internet).
User :
See End User .
User Defined:
Something defined by a user or developer, usually a developer, for making the coding process easier.
User-Defined Data Type:
See Custom Data Type .
User Friendly:
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.