一句SQL完成乘法表

在论坛上看到,以前很喜欢写SQL，收藏下来重温SQL时看看：

 

SQL  code

declare @x int=1,@y int,@c varchar(6000)while(@x<=9)begin select @y=1,@c='' while(@y<=@x) begin   select @c=@c+cast(@y as varchar)+'x'+cast(@x as varchar)+'='+cast(@x*@y as varchar)+' '   select @y=@y+1 end print @c+char(10) select @x=@x+1end/*1x1=1 1x2=2 2x2=4 1x3=3 2x3=6 3x3=9 1x4=4 2x4=8 3x4=12 4x4=16 1x5=5 2x5=10 3x5=15 4x5=20 5x5=25 1x6=6 2x6=12 3x6=18 4x6=24 5x6=30 6x6=36 1x7=7 2x7=14 3x7=21 4x7=28 5x7=35 6x7=42 7x7=49 1x8=8 2x8=16 3x8=24 4x8=32 5x8=40 6x8=48 7x8=56 8x8=64 1x9=9 2x9=18 3x9=27 4x9=36 5x9=45 6x9=54 7x9=63 8x9=72 9x9=81 */

  

 

SQL code

declare @x intdeclare @y intdeclare @c varchar(6000)set @x = 1while(@x<=9)begin select @y=1,@c='' while(@y<=@x) begin   select @c=@c+cast(@y as varchar)+'x'+cast(@x as varchar)+'='        +(case when len(ltrim(@x*@y))>1 then '' else ' ' end)+ltrim(@x*@y)+' '   select @y=@y+1 end print @c+char(10) select @x=@x+1end

 

SQL code

selectmax(case when a < 1 then '' else '1*'+cast(a as varchar)+'='+cast(a*1 as varchar)   end)   as   [1],max(case when a < 2 then '' else '2*'+cast(a as varchar)+'='+cast(a*2 as varchar)   end)   as   [2],max(case when a < 3 then '' else '3*'+cast(a as varchar)+'='+cast(a*3 as varchar)   end)   as   [3],max(case when a < 4 then '' else '4*'+cast(a as varchar)+'='+cast(a*4 as varchar)   end)   as   [4],max(case when a < 5 then '' else '5*'+cast(a as varchar)+'='+cast(a*5 as varchar)   end)   as   [5],max(case when a < 6 then '' else '6*'+cast(a as varchar)+'='+cast(a*6 as varchar)   end)   as   [6],max(case when a < 7 then '' else '7*'+cast(a as varchar)+'='+cast(a*7 as varchar)   end)   as   [7],max(case when a < 8 then '' else '8*'+cast(a as varchar)+'='+cast(a*8 as varchar)   end)   as   [8],max(case when a < 9 then '' else '9*'+cast(a as varchar)+'='+cast(a*9 as varchar)   end)   as   [9]from   (select   1   as   aunion   allselect   2union   allselect   3union   allselect   4union   allselect   5union   allselect   6union   allselect   7union   allselect   8union   allselect   9)   as   t1group   by   a

 SQL code
--这样会不会好看一些
select
max(casewhen a>0then'1*'+a+'='+ltrim(a*1)end)[1],
max(casewhen a>1then'2*'+a+'='+ltrim(a*2)end)[2],
max(casewhen a>2then'3*'+a+'='+ltrim(a*3)end)[3],
max(casewhen a>3then'4*'+a+'='+ltrim(a*4)end)[4],
max(casewhen a>4then'5*'+a+'='+ltrim(a*5)end)[5],
max(casewhen a>5then'6*'+a+'='+ltrim(a*6)end)[6],
max(casewhen a>6then'7*'+a+'='+ltrim(a*7)end)[7],
max(casewhen a>7then'8*'+a+'='+ltrim(a*8)end)[8],
max(casewhen a>8then'9*'+a+'='+ltrim(a*9)end)[9]
from ( select ltrim(number) afrom master..spt_values
    where type='p'andnumberbetween1and9
) t group by a

SQL code

select '1*'+a+'='+CAST(1*1*(case when a>=1Then a else NULL end) as varchar) as [1],'2*'+a+'='+CAST(2*1*(case when a>=2Then a else NULL end) as varchar) as [2],'3*'+a+'='+CAST(3*1*(case when a>=3Then a else NULL end) as varchar) as [3],'4*'+a+'='+CAST(4*1*(case when a>=4Then a else NULL end) as varchar) as [4],'5*'+a+'='+CAST(5*1*(case when a>=5Then a else NULL end) as varchar) as [5],'6*'+a+'='+CAST(6*1*(case when a>=6Then a else NULL end) as varchar) as [6],'7*'+a+'='+CAST(7*1*(case when a>=7Then a else NULL end) as varchar) as [7],'8*'+a+'='+CAST(8*1*(case when a>=8Then a else NULL end) as varchar) as [8],'9*'+a+'='+CAST(9*1*(case when a>=9Then a else NULL end) as varchar) as [9]from (select top 9 CAST(Row_Number()over (order by name) as varchar(10) ) as a from master..spt_values )b 

 

SQL code

declare @a smallint,        @b smallint,        @str varchar(1000)set @a=1while @a<=9begin    set @b=1    set @str=''    while @b<=@a    begin        select @str=@str+convert(varchar(1),@b)+'*'+convert(varchar(1),@a)+'='+convert(varchar(2),@a*@b)+space(2)        set @b=@b+1    end    print @str    set @a=@a+1end