Diagnosing errors in SQL can be challenging for programmers with experience in HLLs such as RPG and Cobol. Some of this challenge arises from SQL's different syntax, and some of it is due to the different "philosophy" of SQL, which requires that the programmer specify what needs to be done and leaves the decisions about how to do it to the SQL query optimizer. In this article, I provide programmers new to SQL a few basic insights and tips for dealing with SQL problems. Use SQL ...

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