do you use message subfiles? What are the necessary keywords required coding a message subfile?

1141

SET is the ANSI standard for variable assignment, SELECT is not. SET can only assign one variable at a time, SELECT can make multiple assignments at once. If assigning from a query, SET can only assign a scalar value. If the query returns multiple values/rows then SET will raise an error. SELECT will assign one of the values to the variable and hide the fact that multiple values were returned (so you'd likely never know why something was going wrong elsewhere - have fun troubleshooting that one) When assigning from a query if there is no value returned then SET will assign NULL, where SELECT will not make the assignment at all (so the variable will not be changed from it's previous value) As far as speed differences - there are no direct differences between SET and SELECT. However SELECT's ability to make multiple assignments in one shot does give it a slight speed advantage over SET.

2682

if you wish to use the rewrite command how must the vsam file be opened?

1161

Explain the difference between exec cics handle condtion and an exec cics ignore command?

1046

what are the secirity tools in mainframe? and let me know about the other tools and the uses of thst immediatly................

2332

What is the difference between the positional and keyword parameters? Give examples.

1274

Is automatic restart possible in jcl?

1230

what is the difference between udate and the system date?

2082

Have you used the sort in your project?for this type of questions any working on real time project give the eg. with real time scenario.

2440

how can you load a vsam data set with records ?

1171

Explain the difference between search and searchall?

878

What is dclgen in db2?

1156

what is the command used to invoke rlu ?

1903

Explain about base register?

1069

List some fields from sqlca?

1065