Specifies the primary data base to be accessed by QUERY.
Discussion |
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This command is used to specify the primary data base. You must
use either this command or the DEFINE command to identify the
primary data base before you can use QUERY commands which
access a data base. You can specify a new primary data base
at any time, and you can open additional data bases with
the MULTIDB command.
When you enter the DATA-BASE= command, QUERY prompts you for a
password and an access mode.
When you enter this command, QUERY first closes the current primary
data base before attempting to open the requested data base.
If QUERY is unable to open the requested
data base, you can:
Specify a different data base with the DATA-BASE= or DEFINE
command.
Use the data base(s) opened with the MULTIDB command.
Use commands which do not require an open data base
(e.g., HELP).
Passwords and Access Modes |
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Passwords are created by the data base administrator or designer
who will tell you which one you may use. The password determines
which data sets and/or
data items in the data base you are allowed to read and/or
write. A password must be entered exactly as it was created,
with including upper and lowercase
characters.
If you are signed on as the creator and enter a semicolon in
place of the data base password, you will be given read and
write access to all data items and data sets in the specified
data base. This is true even if there are no passwords
specified for the data base.
If you enter an invalid password, you are assigned
a user class of zero which will allow you read
and/or write access to some or all of the data sets and data
items in the specified data base. When this happens, the
following message is returned:
PASSWORD DOES NOT MATCH ANY DEFINED FOR SPECIFIED DATA BASE;
USER CLASS ZERO (0) WAS ASSIGNED
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If there are no data sets and/or data items which you can access,
the following message will be returned:
If you are not sure that you will have access to the data items
that you need, you can change the password with the DEFINE,
DATA BASE=, or PASSWORD= command.
After you enter a password, QUERY prompts you for the
access mode.
You must enter a valid access mode represented by a number
between 1 and 8. The description of modes in Section 1 will help
you determine which mode to use.
Job Mode
If the DATA-BASE= command is entered in job mode, the password
and the mode number must follow the command in the next two
records, respectively.