read a
 x=`echo $a | cut -d , -f 1`
 y=`echo $a | sed 's/.*,//'`
 c=`echo $USER | cut -c -2`"OPR"`echo $USER | cut -c 6-`
 sqlplus -s `echo $c`/`echo $c`@$OPERATIONAL_DB_NAME @dbl.sql $x $y

SET SERVEROUTPUT ON
DECLARE
x varchar2(100):='&&1';
y varchar2(100):='&&2';
BEGIN
execute immediate 'CREATE DATABASE LINK  SSS_DBL CONNECT TO ' || x || ' IDENTIFIED BY ' || x || ' USING ''' || y || '''';
@1_a.sql
@1_b.sql
@1_c.sql
END;
/
EXIT;