SQL/MX Glossary

Glossary
HP NonStop SQL/MX Glossary—523732-002
Glossary-7
cursor position
cursor position. The current position of a cursor before, at, or after a row in a set of
selected rows.
cursor stability. The guarantee that a row at the current cursor position cannot be modified
by another program. For SQL/MX to guarantee cursor stability, you must specify
SERIALIZABLE access for the SELECT statement that defines the cursor.
customizer. See SQLJ customizer.
D
DAM parallelism. Parallel execution in multiple DAM fragment instances, which is
characterized by no-wait communication (asynchronous access).
DAM process. An instance of the Data Access Manager (DAM). A separate DAM process
manages each volume.
Data Access Manager (DAM). The component of SQL/MX that provides access to data. A
separate DAM process manages each volume.
data administrator. The person who specifies what data is needed by a business or
organization; the liaison between the business or organization user and the database
administrator.
data consistency. The condition of a database when related data values agree with one
another according to user-defined criteria. Consistency is one aspect of data integrity.
See also data integrity.
Data Control Language (DCL). See DCL.
data control statement. See DCL statement.
Data Definition Language (DDL). See DDL
.
data definition statement. See DDL statement
.
data fork. See resource fork.
data independence. The ability to change the definition of a database without changing the
applications that use the database. Contrast with program independence.
data integrity. The condition of a database when its data values are accurate, valid, and
consistent according to rules established for changing the database. Data consistency
is one aspect of data integrity. Contrast with definitional integrity. See also integrity
constraint.
Data Manipulation Language (DML). See DML.
data manipulation statement. See DML statement.