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Java Database


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by , 03-09-2012 at 08:21 PM (754 Views)
Databases are accessed by usage of a standard language SQL. It is used for the manipulation and also to access the data, in following.
  • MySQL
  • DB2
  • Access
  • Oracle
  • SQL Server
  • Sybase

The SQL language consist of these language elements:

  • Clauses: Clauses are considered to be the constituent components of queries and statements.
  • Expressions: They can produce tabular data or scalar values which comprises of columns & rows.
  • Predicates: conditions are specified which can be evaluated to SQL
  • Queries: data is retrieved based on criteria.
  • Statements:. Hold a permanent effect at data. It controls connections, transactions, program flow and sessions.

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