1 Stroke is the No. 5 cause of death in the U.S., behind heart disease, cancer, chronic lower respiratory disease, and unintentional injuries. 2  About 130,000 Americans die every year from stroke. 3  Every year, 795,000 individuals have a stroke in the United States. 4  Someone in the U.S. dies every 4 minutes from stroke.
A cross join is used when you wish to create combination of every row from two tables. All row combinations are included in the result; this is commonly called cross product join. A common use for a cross join is to create obtain all combinations of items, such as colors and sizes. Note: The series starts with the article Introduction to Database Joins. All the examples for this lesson are based on Microsoft SQL Server Management Studio and the AdventureWorks2012 database.
Crosstab queries are data retrieval queries used primarily for reporting purposes. They differ from typical SELECT queries in Microsoft Access in that they can pivot aggregated row data into a columnar format. The one prerequisite to this query is that the data must be aggregated in some fashion.o create the data, I used what's known as a Cartesian Product (Cross Join). The query named qryCreateSampleData in the sample database will introduce you to this useful tool for creating dummy data for testing purposes. Now that we have a structure and table to query, we're ready to create our crosstab query.