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addis abeba
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c programing
N.S.SriNivethawhat is meant by extern data type?
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it is one of the storage class… if u declared variabe as extern, this variable can be used in another program… simply we extends the lifetime..
to use one source file into another source file
Extern is a storage type..which is created at the time when declared as global, initialised at the time of declaration or later, can be accessed in any function in the same/different program file.
sonali patnaik
external data type is the lookup method used to find data from the external data source. An external data type contains all the fields (data items) in its data source that meet the lookup criteria. When the database is accessed, the fields from the database schema are assigned to the data type. You can also add additional fields to the type, for example, if a field was added to the data source after you created the data type. You can delete fields that you do not need to have as part of your data type.