12-10-2010, 02:05 PM
Presented by:
k.gopal
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Introduction
SQL Server is a client/server based relational database management system
Runs on Windows 2000 Professional, Server, Advanced Server, NT 4, Windows 9x/ME or Windows CE
Included in BackOffice product family
Include in .Net Servers family
SQL Functions
SQL Aggregate Functions
• AVG() - Returns the average value
• COUNT() - Returns the number of rows
• FIRST() - Returns the first value
• LAST() - Returns the last value
• MAX() - Returns the largest value
• MIN() - Returns the smallest value
• SUM() - Returns the sum
SQL Scalar functions
• UCASE() - Converts a field to upper case
• LCASE() - Converts a field to lower case
• MID() - Extract characters from a text field
• LEN() - Returns the length of a text field
• ROUND() - Rounds a numeric field to the number of decimals specified
• NOW() - Returns the current system date and time
• FORMAT() - Formats how a field is to be displayed
The AVG() Function
The AVG() function returns the average value of a numeric column.
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