Which isolation level provides highest data integrity?

1126

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.

2677

What is the connection string to connect to the DB2 Database ?

1135

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?

8301

What is db2 plan table?

1054

What is meant by dclgen?

1114

What are the prerogatives?

1083

If I have a view which is a join of two or more tables, can this view be updateable?

1139

What is rebind in db2?

1072

What is db2 bind process?

1245

What is dbrm? What it contains?

1163

How can we retrieve the total number of records in RPG & CLLE?

656

Mention data types used in db2 ?

1166

Comment whether dclgen is mandatorily used. If not, then what is the point of using it?

1063

What is db2 optimizer?

1249