In SQL, the at sign (@)  means execute. When you type @ and the
    name of an indirect command file, SQL executes the statements in
    that file as if you typed them one-at-a-time at the SQL prompt
    (SQL>). The command file must be a text file that contains SQL
    statements.

    The default file extension for an indirect command file is .SQL.

    You can use the SET VERIFY statement to display the commands in
    the file as they execute.

    SQL recognizes a special SQL command file called SQLINI.SQL,
    which contains SQL statements to be issued before SQL displays
    the SQL prompt (SQL>). If this file exists, SQL executes the
    commands in the file first, before displaying the prompt and
    accepting your input. If you define the logical name to point to
    a general initialization file, SQL uses this file. Otherwise, it
    looks for SQLINI.SQL in the current default directory.

1  –  Environment

    You can issue the execute (@)  statement only in interactive SQL.

2  –  Format

  @<file-spec>

3  –  Arguments

3.1  –  file-spec

    Specifies the name of an indirect command file. You can use
    either a full file specification, a file name, or a logical name
    on OpenVMS. If you use a file name, SQL looks in the current
    default directory for a file by that name. The file must contain
    valid SQL statements.

4  –  Examples

    Example 1: Storing interactive SQL statements in a startup file

    You can use an indirect command file to specify characteristics
    of your SQL terminal session. This example assumes that SQLINI is
    defined as a logical name that points to the file setup.sql. The
    file contains the following SQL statements:

    SET VERIFY;
    SET EDIT KEEP 5; -- This line will be displayed on the terminal

    SQL executes the file when you invoke interactive SQL.

    $ SQL$
    SQL> SET EDIT KEEP 5; -- This line will be displayed on the terminal
    SQL>

    When it executes, setup.sql turns on the indirect command file
    display and limits the number of statements saved by SQL for
    editing to five.

    Example 2: Executing frequently used queries

    The file EMPADDR.SQL contains the following SQL statements:

    -- This command file generates information for a mailing list.
    --
    ATTACH 'FILENAME personnel';
    SET OUTPUT MAILLIST.DOC
    SELECT  FIRST_NAME, MIDDLE_INITIAL, LAST_NAME,
            ADDRESS_DATA_1, ADDRESS_DATA_2, CITY, STATE, POSTAL_CODE
    FROM EMPLOYEES;
    --
    -- Execute the file by using the following command:
    --
    @EMPADDR

    Example 3: Using a logical name to run a command file

    If you define COUNT to be a logical name, you can use the command
    @COUNT to execute the statements in the file, even if the file is
    located in a directory other than the default directory. The file
    COUNT.SQL contains the following SQL statements:

    -- This command file counts the rows in
    --  each table of the personnel database.
    --
    SET NOVERIFY;
    SELECT 'Count of Employees -------> ', COUNT (*) FROM EMPLOYEES;
    SELECT 'Count of Jobs ------------> ', COUNT (*) FROM JOBS;
    SELECT 'Count of Degrees ---------> ', COUNT (*) FROM DEGREES;
    SELECT 'Count of Salary_History --> ', COUNT (*) FROM SALARY_HISTORY;
    SELECT 'Count of Job_History -----> ', COUNT (*) FROM JOB_HISTORY;
    SELECT 'Count of Work_Status -----> ', COUNT (*) FROM WORK_STATUS;
    SELECT 'Count of Departments -----> ', COUNT (*) FROM DEPARTMENTS;
    SELECT 'Count of Colleges --------> ', COUNT (*) FROM COLLEGES;

    The following example shows how to execute the file and the
    output:

    $ SQL
    SQL> @COUNT;

     Count of Employees ------->            100
    1 row selected

     Count of Jobs ------------>             15
    1 row selected

     Count of Degrees --------->            166
    1 row selected
       .
       .
       .