IT163 Unit 5 BD Research Paper Example | Topics and Well Written Essays - 250 words

IT163 Unit 5 BD - Research Paper ExampleThe coupling condition brings the family relationship between the rows of one table and the rows of another table. The trades union query enables a query to select any number of columns from more than two tables (Connolly, & Begg, 2005). If two of these tables attain a column which share the same give, then all the qualifying name attributes of the columns will be used so that the queries will have the name of the table that is used. Join query come in many flavors according to the location where the join query will be located. There are conditions that join query will work. A join query will either work under WHERE clause or FROM clause. These are the conditions that will enable join queries to work. This is in aimportant aspect which should be looked into when undertaking and creating join queries. In an example where there are two tables holding persons information and the order information, if one wants to conduct some data from the t wo tables (Connolly, & Begg,