what is metadata and it's use?

Question Posted / harish

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what is metadata and it's use?..

Answer / anand

Meta data nothing but data about date.

For example,

22 - marks
Raju - name
96 - age
Hyd - address

In the above example we can say that marks,name,age and address called Meta data, because that data gives detail information about actual data.

<marks>22</marks>
<name>Raju</name>
<age>96</age>
<address>Hyd</address>

Tn the above one we can say that the tags like <marks>,<name>,<age>,<address> are called meta tags, because that tags gives details information about actual data.

In java we have two types of metadata.
i) ResultSetMetaData
ii) DatabaseMetaData

ResultSetMetaData is used to know the details of ResultSet object like no.of columns,names of the columns and datatypes of the column etc.

DatabaseMetaData is used to know the information about database server like version of the database server,name of the database server etc.

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what is metadata and it's use?..

Answer / sowmya

metadata is nothing but data about data.
This data includes column-type,constraint-type etc.
It describes the whole structure of table data

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what is metadata and it's use?..

Answer / harish

u can access information abt the database as a whole or abt
a particular query ResultSet.This section describes how
DatabaseMetaData and ResultSetMetaData objects are obtained
and queried.

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