Technology Questions

SELECT "column_name"

FROM "table_name"

WHERE "column_name" IS NULL.

Use the DBMS_OUTPUT package. Another possible method is to use the SHOW ERROR command.

Server control events can be handled inside a server itself

They should be initialized during the time of declaration itself otherwise it is a compilation eror

It is advisable to use container classes of the STL so that you don’t have to go through the pain of writing the entire code for handling collisions, making sure its working well, testing it repeatedly with an overhead of time consumption.

Suppose you have some data that has values associated with strings and its fields consist of grades> in this situation you can directly use hash table instead of having it created by yourself.

Key Fields - (PROCOPT=K)

- Used to sequence the database and can't be changed

- It is the field within a segment, used to identify the occurrence of the segment

- Used to maintain the IMS segments in ascending sequence.

Search Fields - (PROCOPT=G)

- Used to search for a segment, without the segment being sequenced on that field

- A segment need not have a key or search field.

Both types of fields can be used to search the database.