Mysql 3创建3 | 1、3 | 2和3 | 3结果 value | count ------+------ foo | 1 bar | 3 baz | 2 value | count | index ------+-----

3创建3 | 1、3 | 2和3 | 3结果

value | count
------+------
foo   |     1
bar   |     3
baz   |     2

value | count | index
------+-------+------
foo   |     1 |     1
bar   |     3 |     1
bar   |     3 |     2
bar   |     3 |     3
baz   |     2 |     1
baz   |     2 |     2

SELECT value, count, number
FROM table
    JOIN Numbers 
        ON table.count >= Numbers.number

CREATE TABLE Numbers(Number INT PRIMARY KEY);

INSERT Numbers 
SELECT TOP 1000 ROW_NUMBER() OVER (ORDER BY name)
FROM sys.all_columns;

DECLARE @foo TABLE(value VARCHAR(32), [count] INT);

INSERT @foo SELECT 'foo', 1
UNION ALL SELECT 'bar', 3
UNION ALL SELECT 'baz', 2;

SELECT f.value, f.[count], [index] = n.Number
FROM @foo AS f, Numbers AS n
WHERE n.Number <= f.[count];

value | count | index
------+-------+------
foo   |     1 |     1
bar   |     3 |     1
bar   |     3 |     2
bar   |     3 |     3
baz   |     2 |     1
baz   |     2 |     2

with 
-- Please add this on Postgresql:
-- RECURSIVE
tbl_populate(value, cnt, ndx) as
(
  select value, cnt, 1 from tbl

  union all

  select t.value, t.cnt, tp.ndx + 1
  from tbl t
  join tbl_populate tp 
  on tp.value = t.value  
  and tp.ndx + 1 <= t.cnt
)
select * from tbl_populate
order by cnt, ndx

declare @Stuff as Table ( Name VarChar(10), Number Int )
insert into @Stuff ( Name, Number ) values ( 'foo', 1 ), ( 'bar', 3 ), ( 'baz', 2 )

select * from @Stuff

; with Repeat ( Name, Number, Counter ) as (
  select Name, Number, 1
    from @Stuff
    where Number > 0
  union all
  select Name, Number, Counter + 1
    from Repeat
    where Counter < Number
  )
select *
  from Repeat
  order by Name, Counter -- Group by name.
  option ( maxrecursion 0 )

SELECT val, ct, generate_series(1, ct) AS index
FROM   tbl;

CREATE VIEW generator_16
AS SELECT 0 n UNION ALL SELECT 1  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   UNION ALL SELECT 10 UNION ALL SELECT 11 UNION ALL
   SELECT 12  UNION ALL SELECT 13 UNION ALL SELECT 14 UNION ALL 
   SELECT 15;

CREATE VIEW generator_256
AS SELECT ( ( hi.n * 16 ) + lo.n ) AS n
     FROM generator_16 lo, generator_16 hi;

CREATE VIEW generator_4k
AS SELECT ( ( hi.n * 256 ) + lo.n ) AS n
     FROM generator_256 lo, generator_16 hi;

CREATE VIEW generator_64k
AS SELECT ( ( hi.n * 256 ) + lo.n ) AS n
     FROM generator_256 lo, generator_256 hi;

CREATE VIEW generator_1m
AS SELECT ( ( hi.n * 65536 ) + lo.n ) AS n
     FROM generator_64k lo, generator_16 hi;

SELECT t.value, t.cnt, i.n
FROM tbl t
JOIN generator_64k i 
ON i.n between 1 and t.cnt
order by t.value, i.n

SELECT  TableName.*
FROM    TableName
JOIN    master.dbo.spt_values on type = 'P' and number < 20

WITH Numbers(Num) AS
(
    SELECT 1 AS Num
    UNION ALL 
    SELECT Num + 1
    FROM   Numbers c
    WHERE  c.Num < 1000
)

SELECT VALUE,COUNT, number
FROM   TABLE
       JOIN Numbers
            ON  TABLE.count >= Numbers.Num
OPTION(MAXRECURSION 1000)

  SELECT *
    FROM yourtable
         CROSS JOIN (    SELECT ROWNUM index_t
                           FROM DUAL
                     CONNECT BY LEVEL <= (SELECT MAX (count_t) FROM yourtable))
   WHERE index_t <= count_t
ORDER BY VALUE, index_t;