一条SQL搞定九九乘法表（6种方法，网上集锦）
方法1
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+1
end
结果：
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=205x5=25
1x6=6 2x6=12 3x6=18 4x6=245x6=30 6x6=36
1x7=7 2x7=14 3x7=21 4x7=285x7=35 6x7=42 7x7=49
1x8=8 2x8=16 3x8=24 4x8=325x8=40 6x8=48 7x8=56 8x8=64
1x9=9 2x9=18 3x9=27 4x9=36 5x9=45 6x9=547x9=63 8x9=72 9x9=81
方法2
declare @a smallint,
@b smallint,
@str varchar(1000)
set @a=1
while @a<=9
begin
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+1
end
结果：
1*1=1
1*2=2 2*2=4
1*3=3 2*3=6 3*3=9
1*4=4 2*4=8 3*4=12 4*4=16
1*5=5 2*5=10 3*5=15 4*5=20 5*5=25
1*6=6 2*6=12 3*6=18 4*6=24 5*6=30 6*6=36
1*7=7 2*7=14 3*7=21 4*7=28 5*7=35 6*7=42 7*7=49
1*8=8 2*8=16 3*8=24 4*8=32 5*8=40 6*8=48 7*8=56 8*8=64
1*9=9 2*9=18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=81
方法3
select
max(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 a
union all
select 2
union all
select 3
union all
select 4
union all
select 5
union all
select 6
union all
select 7
union all
select 8
union all
select 9
) as t1
group by a
结果：
1 2 3 4 5 6 7 8 9
1*1=1
1*2=2 2*2=4
1*3=3 2*3=6 3*3=9
1*4=4 2*4=8 3*4=12 4*4=16
1*5=5 2*5=10 3*5=15 4*5=20 5*5=25
1*6=6 2*6=12 3*6=18 4*6=24 5*6=30 6*6=36
1*7=7 2*7=14 3*7=21 4*7=28 5*7=35 6*7=42 7*7=49
1*8=8 2*8=16 3*8=24 4*8=32 5*8=40 6*8=48 7*8=56 8*8=64
1*9=9 2*9=18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=81
方法4
select
max(case when a>0 then '1*'+a+'='+ltrim(a*1) end) [1],
max(case when a>1 then '2*'+a+'='+ltrim(a*2) end) [2],
max(case when a>2 then '3*'+a+'='+ltrim(a*3) end) [3],
max(case when a>3 then '4*'+a+'='+ltrim(a*4) end) [4],
max(case when a>4 then '5*'+a+'='+ltrim(a*5) end) [5],
max(case when a>5 then '6*'+a+'='+ltrim(a*6) end) [6],
max(case when a>6 then '7*'+a+'='+ltrim(a*7) end) [7],
max(case when a>7 then '8*'+a+'='+ltrim(a*8) end) [8],
max(case when a>8 then '9*'+a+'='+ltrim(a*9) end) [9]
from
(
select ltrim(number) a from master..spt_values
where type='p' and number between 1 and 9
) t groupby a
结果：
1 2 3 4 5 6 7 8 9
1*1=1 NULL NULL NULL NULL NULL NULL NULL NULL
1*2=2 2*2=4 NULL NULL NULL NULL NULL NULL NULL
1*3=3 2*3=6 3*3=9 NULL NULL NULL NULL NULL NULL
1*4=4 2*4=8 3*4=12 4*4=16 NULL NULL NULL NULL NULL
1*5=5 2*5=10 3*5=15 4*5=20 5*5=25 NULL NULL NULL NULL
1*6=6 2*6=12 3*6=18 4*6=24 5*6=30 6*6=36 NULL NULL NULL
1*7=7 2*7=14 3*7=21 4*7=28 5*7=35 6*7=42 7*7=49 NULL NULL
1*8=8 2*8=16 3*8=24 4*8=32 5*8=40 6*8=48 7*8=56 8*8=64 NULL
1*9=9 2*9=18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=81
方法5
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
结果：
1 2 3 4 5 6 7 8 9
1*1=1 NULL NULL NULL NULL NULL NULL NULL NULL
1*2=2 2*2=4 NULL NULL NULL NULL NULL NULL NULL
1*3=3 2*3=6 3*3=9 NULL NULL NULL NULL NULL NULL
1*4=4 2*4=8 3*4=12 4*4=16 NULL NULL NULL NULL NULL
1*5=5 2*5=10 3*5=15 4*5=20 5*5=25 NULL NULL NULL NULL
1*6=6 2*6=12 3*6=18 4*6=24 5*6=30 6*6=36 NULL NULL NULL
1*7=7 2*7=14 3*7=21 4*7=28 5*7=35 6*7=42 7*7=49 NULL NULL
1*8=8 2*8=16 3*8=24 4*8=32 5*8=40 6*8=48 7*8=56 8*8=64 NULL
1*9=9 2*9=18 3*9=27 4*9=36 5*9=45 6*9=54 7*9=63 8*9=72 9*9=81
方法6
with cte as
(
select 1 n union all select n+1 from cte where n<9
)
select t2.n , stuff((
select ', ' + cast(t2.n as char(1)) + 'x'+ cast(n as char(1)) + '=' + cast(t2.n*n as char(2))
from cte where (n <= t2.n)
for xml path ('')),1,2,'') from cte t1 left join cte t2
on t1.n >= t2.n
group by t2.n
结果：
n (无列名)
1 1x1=1
2 2x1=2, 2x2=4
3 3x1=3, 3x2=6 , 3x3=9
4 4x1=4, 4x2=8 , 4x3=12, 4x4=16
5 5x1=5, 5x2=10, 5x3=15, 5x4=20, 5x5=25
6 6x1=6, 6x2=12, 6x3=18, 6x4=24, 6x5=30, 6x6=36
7 7x1=7, 7x2=14, 7x3=21, 7x4=28, 7x5=35, 7x6=42, 7x7=49
8 8x1=8, 8x2=16, 8x3=24, 8x4=32, 8x5=40, 8x6=48, 8x7=56, 8x8=64
9 9x1=9, 9x2=18, 9x3=27, 9x4=36, 9x5=45, 9x6=54, 9x7=63, 9x8=72, 9x9=81