In Chapter 10, you learned how to manipulate data using T-SQL statements. In this chapter, you will learn about a very important aspect of manipulating data: transactions. A transaction is a unit of work in SQL Server. Most of the time, a transaction is one statement that inserts, updates, or deletes data. It is possible, however, to define an explicit transaction that includes one or more statements. You can also include SELECT statements in a transaction. A transaction can be committed or rolled back as a unit.
The classic example involves a bank ATM where a customer can transfer money from a savings account ...