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SQL Help needed [message #572480] Wed, 12 December 2012 06:18 Go to next message
christiparks
Messages: 1
Registered: December 2012
Location: India
Junior Member
Hello all,I am new to this forum and I would like to ask that what are the benefits of sql training, what all topics should be covered and it is kinda bothering me ... and has anyone studies from this course wiziq.com/course/125-comprehensive-introduction-to-sql of SQL tutorial online?? or tell me any other guidance...
would really appreciate help... and Also i would like to thank for all the information you are providing on sql.

[Updated on: Wed, 12 December 2012 06:31]

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Re: SQL Help needed [message #572520 is a reply to message #572480] Wed, 12 December 2012 18:22 Go to previous message
Flyby
Messages: 188
Registered: March 2011
Location: Belgium
Senior Member
Benefits: inserting,retrieving and manipulating data from a large selection of databases. Basics are mostly the same for the various SQL-dialects
Quite essential when you deal with those as developer/manager even hidden behind ORM-tools like Hibernate/Linq. There is a mindset difference using sets (moving boxes, SQL optimized) instead of enumerate and walkthrough (move the contents of the box one by one)
Basics: SELECT ... FROM ... WHERE ... GROUP BY ... ORDER BY ... ;
Basics: joins (inner,outer,left,right)
Manipulation: INSERT/DELETE/UPDATE/MERGE
Subquery refactoring: WITH
Transactions and the ACID principle
W3school seems to have an extensive area
SQLzoo is kind of interactive
Mind the strange behavior of NULL, and try to avoid select *

Try setting up a database
and querying it with SQL Developer

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