BEGIN...END operator in sql server

Introduction

To indicate that your Statement covers more than one line, start it with the BEGIN keyword. Then you must use the END keyword to indicate where the Statement ends. In this case, the formula of a conditional statement would appear as follows:

Keyword Expression BEGIN       Statement Line 1       Statement Line 2             Statement Line n END

 
You can still use the BEGIN...END combination even if your Statement covers only one line:

Keyword Expression BEGIN       Statement END