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Explorer
update query
An action query that changes a set of records according to criteria you specify. An update query doesn’t return any rows/records.
URL
Uniform Resource Locator. An address to an object, document, or page or other destination (for example, a newsgroup or a World Wide Web page) on the Internet or an intranet. A URL expresses the protocol (such as FTP or HTTP) to be accessed and where the destination is located. A URL may also specify an Internet e-mail address. Some examples of URLs are:
http://www.someones.homepage/default.html
ftp://ftp.server.somewhere/ftp.file
news:alt.hypertext
user-defined type
Any data type defined using the Type statement. User-defined data types can contain one or more elements of any data type. Arrays of user-defined and other data types are created using the Dim statement. Arrays of any type can be included within user-defined types.
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user-interface negotiation
The process of placing the menus and toolbars of a Visual Basic application (or Automation controller) and those of an ActiveX component together on a container form.
user account
An account identified by a user name and password that is created to manage access to objects in a remote database.
variance
The square of the standard deviation. It is a measure of the amount by which all values in a group vary from the average value of the group.
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Unicode
International Standards Organization (ISO) character standard. Unicode uses a 16-bit (2-byte) coding scheme that allows for 65,536 distinct character spaces. Unicode includes representations for punctuation marks, mathematical symbols, and dingbats, with substantial room for future expansion.
union query
An SQL-specific select query that creates a snapshot-type Recordset object containing data from all specified records in two or more tables with any duplicate records removed. To include the duplicates, add the keyword ALL.
For instance, a union query of the Customers table and the Suppliers table results in a snapshot-type Recordset that contains all suppliers that are also customers.
unmanaged replica
A replica that is not managed by a Synchronizer. Unmanaged replicas appear on the Synchronization window with a special icon. You cannot set synchronization schedules from an unmanaged replica, although they can be synchronized by another Synchronizer or through DAO code.
update
The process that saves changes to data in a record. Until the record is saved, changes are stored in a temporary record called the copy buffer. The UPDATE clause in an SQL statement changes data values in one or more records (rows) in a database table.