Why do we need to create an alias if we can directly use
the table name? What are the benefits of referring a table
name by its alias?
Also, when should we go for alias and when for synonyms?
1) I have 3 programs : PGMA, PGMB, PGMC. PGMA calls PGMB
and PGMB calls PGMC. I have to do inserts, updates in all
the 3 pgms.
2) Say PGMC has done its work successfully and returned to
PGMB
3) PGMB had an SQL error while doing some update
4) PGMA has already done some updates before calling PGMB
all are running under the same CICS region.
What will happen if I issue SYNCPOINT ROLLBACK in PGMB when
it abends ? Does all the changes in PGMA,B,C rollback ?
(because all the pgms belong to same task).
Suppose pgm A calling Pgm B .Pgm B has some Db2 program. at
the time of compilation should plan and package will be
created for both A and B or only B? What is the concept?
758
I understand Join always perform better than subqueries.
Then what is the advantage/use of Subqueries/correlated
subqueries etc.,in DB2 programming.Please explain.
136
by using cursors , we can access particular records from
the table based on some condition, i want to delete those
selected records, how can we write a query for this in the
program?
Hi All,
In a Cobol-DB2 program, I am fetching rows from 4 tables
using cursor and then based on the a field present in that
table, It processes the information accordingly..for
example stat-c is one digit field..if stat-c is 'D' then
the a row is deleted from table and written those details
in to a file. If the stat-c is 'U' then a row is updated
(hardcoded what to update)in a table and written those
details in to a file. If the stat-c is 'I' then a row is
inserted in a table and written those details in to two
files. The issue is i have to include the intermediate
commits. When an abend occurs, due to commit statement db2
tables will be saved, But there will be lose of file
contents. When we resubmitting the job associated with this
program there will be insert ,update and delete anomolies
to avoid that what measures could be taken?.
The intermediate commit is nothing but issuing
commit after massive inserts, updates and deletes(sum of
500actions)
88
If anyone has IBM Certification Dumps pls forward to me & also
let me know what are the Certification Codes that are
available in DB2
122
How to test SQL -911 error while developing COB-DB2 program
along with your userid / name. ThanQ
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