There are numerous database vendors in the world each with their own brand of SQL. There is also a SQL standard governed by the American National Standards Institute (ANSI). Most large database vendors practice some form of ANSI-standard SQL but will also have their own unique SQL commands. Join your fellow students in a discussion on SQL implementations using the questions below.

• Discuss two pros and two cons of establishing and using a standard for SQL.
• There exist several vendor-specific implementations of SQL. Research the web and discuss the following points:
  • Select two different SQL implementations and provide a brief description of each. Include the name of the vendor.
  • Of the two implementations you choose, in your opinion, which of the two is the "best" implementation? Provide the reasoning for your answer.
• Review the following article on improving query processing.

https://www.ibm.com/support/knowledgecenter/ssw_ibm_i_74/rzajq/gotips.htm

• Discuss three suggestions for improving query processing 
  • Of the three suggestions, how do they compare to those offered in the article? Were there differences, similarities, conflicting definitions, etc.?
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