Transact-SQL 语句

当流程控制语句必须执行一个包含两条或两条以上Transact-SQL语句块时，可以使用BEGIN...END语句进行控制

use testDB;
go

declare @name varchar(30)
declare @count int 
set @name='陈勇'
set @count=0
set @count=(select count(*) from Students)
if @count>0
begin
   print '还有人呢'
end
else
begin
   print '一个鸟人都没有'
end
go

declare @sum int
declare @i int
set @sum=0
set @i=0
while @i>=0
    begin 
        set @i=@i+1
        if @i>100
            begin
                print '1到100之间的奇数和：'+cast(@sum as char(100))
                break
            end
        if(@i%2=0)
            begin
                set @sum=@sum+@i
            end
        else
        begin
            continue
        end
    end

begin
    waitfor time '20:48:00'
    select * from Students
end