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Recent Posts
SQL Server 2008 : Overview
Your Data, Any Place, Any TimeSQL Server 2008 delivers on Microsoft’s Data Platform vision by helping your organization manage any data, any place, any time. Store data from structured, semi-structured, and unstructured documents, such as images an...
SQL Hosting
SQL Hosting is a hosting, which utilizes SQL database. There are many SQL databases used as SQL hosting backend, and the most common are MS SQL Server (2000 or 2005), MySQL, and MS Access. Why SQL Hosting?You may ask what is the difference between a...
Learn the Modification of the Database
Deletion- Delete all account records at the Kandy City branch.delete * from accountwhere branch_name = ‘Kandy city’- Delete all accounts at every branch located in Kandy.delete * from accountwhere branch_name in (select branch_namefrom branchwher...
Learn Aggregate Functions (Group by and Having clause)
- These functions operate on the multiset of values of a column of a relation, and return a valueavg: average valuemin: minimum valuemax: maximum valuesum: sum of valuescount: number of tuples/values- Find the average account balance at the Kandy cit...
Learn Joined Relations in SQL
- Join operations take two relations and return as a result another relation.- These additional operations are typically used as sub queryexpressions in the from clause- Join condition – defines which tuples in the two relations match,and what attr...
Learn Nested Subqueries and Set Comparison use in SQL
- SQL provides a mechanism for the nesting of sub queries.- A sub query is a select-from-whereexpression that is nested within another query.- A common use of sub queries is to perform tests for set membership, set comparisons,and set cardinality.Exa...

