Let’s Join Together - Joining SQL Tables and Views - Birgitta Hauser

Accessing data with SQL becomes more and more important. For resolving a single request data located in multiple tables must be filtered, accumulated and/or merged together. In this way we need to focus our attention on consolidating data split over multiple tables. SQL provides different methods for joining tables and views together, such as inner, outer, exception, cross and full join. A table or view even can be joined with itself or with the result of a different select statement. The result returned from multiple select statements can be merged and even accumulated in a single SQL statement.

Birgitta Hauser

Independent Consultant

Birgitta Hauser graduated with a business economics diploma and started programming on the AS/400 in 1992. She is an experienced RPG programmer as well as a database and software engineer, focusing on IBM i application and database modernization. Today, she is an independent consultant on application and database modernization on IBM i and Db2 for i.

Birgitta also works in education as a trainer for RPG and SQL developers. Since 2002, she has been a frequent speaker at COMMON user groups meetings and other IBM i and Power conferences in Germany, other European countries, the United States, and Canada. In addition, she is co-author of two IBM Redbooks and has also authored several articles and papers focusing on RPG and SQL for the ITP Verlag (a German publisher), IT Jungle Guru, and IBM DeveloperWorks.