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Facilità d'uso
DBEFileSets
Logical
grouping
of
DBEFiles.
DBEn
vironmen
t
A
collection
of
les
con
taining
one
or
more
databases.
Files
include
the
DBECon
le,
whic
h
holds
startup
parameters
and
log
le
names;
DBEFile0,
whic
h
con
tains
the
system
catalog;
and
log
les.
A
DBen
vironmen
t
may
also
con
tain
additional
DBEFiles
for
table
and
index
data.
The
DBEn
vironmen
t
is
the
maximum
scop e
of
a
transaction
within
IMA
GE/SQL.
DBEFiles
Op erating
system
les
that
hold
DBEn
vironmen
t
data.
DBEFiles
ha
v
e
b oth
ph
ysical
names
(op
erating
system
names)
and
logical
names
b
y
whic
h
the
les
are
kno
wn
in
ternally
to
the
IMA
GE/SQL
system
catalog.
DBEUserID
A
login
name
and
accoun
t
name
joined
with
the
c
haracter
'@'.
One
t
yp e
of
o
wner
of
database
ob
jects.
Em
b edded
SQL
Programming
An
application
program
incorp orating
SQL
statements
for
programmatic
access
to
IMA
GE/SQL
databases.
En
tities
Basic
sub division
of
data
elemen
ts
in
database
design.
Eac
h
en
tity
is
a
thing
or
ev
en
t
ab out
whic
h
information
is
k
ept
in
the
database.
F
or
eac
h
en
tity
,
there
is
at
least
one
attribute
that
uniquely
iden
ties
a
data
elemen
t
as
b elonging
to
the
en
tity
.
Explicit
Lo c
king
Lo c
king
of
tables
in
transactions
b
y
the
use
of
the
LOCK
T
ABLE
statement.
Expression
Sp ecies
a
v
alue.
The
most
common
sources
of
v
alues
are
columns
in
a
table
or
host
v
ariables
in
an
application
program.
Expressions
are
used
to
iden
tify
columns
or
rows
or
to
dene
new
v
alues
for
columns.
Group
Authorization
group.
Mem
b ership
in
a
group
is
used
to
confer
common
o
wnership
or
common
authorization
for
other
ob
jects
in
the
DBE.
Y
ou
create
a
group
explicitly
using
the
CREA
TE
GR
OUP
statement,
then
y
ou
add
users
to
it.
Y
ou
can
then
grant
authorizations
to
the
group
or
rev
ok
e
authorizations
from
the
group.
Y
ou
can
also
use
the
group
name
for
the
o
wnership
of
database
ob
jects.
Glossary-4
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