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