Answer / gaytriom

ataReader to retrieve a read-only, forward-only stream of data
from a database. Results are returned as the query executes,
and are stored in the network buffer on the client until you
request them using the Read method of the Data Reader.

data Reader read value from table and return all value only
one table at a time.

Answer / dolat ram

data reader retrieve data from database in read only and
forward format.Data reader use in connected invierment. Data
reader retrieve updated data according dataset.

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