将 header 行扩展为多个 child 行

Question

在我的 SQL 数据库中，我有一个 table 代表门票书 [Books] 其中一本书中的门票数量可能会有所不同。

这由两列表示 [Books].[StartNo] 和 [Books].[BookSize]

我需要实现的是 select 语句，该语句为该书中的每张票重复 table [书籍] 中的每一行，并带有一个额外的计算列，显示该票的票号行。

所以从

--------+---------+----------
Book    | StartNo | BookSize 
--------+---------+----------
Book 1  |   1     |    3     
Book 2  |   4     |    4    
Book 3  |  19     |    4

像这样

--------+---------+----------+----------
Book    | StartNo | BookSize | TicketNo
--------+---------+----------+----------
Book 1  |   1     |    3     |    1
Book 1  |   1     |    3     |    2
Book 1  |   1     |    3     |    3
Book 2  |   4     |    4     |    4
Book 2  |   4     |    4     |    5
Book 2  |   4     |    4     |    6
Book 2  |   4     |    4     |    7
Book 3  |  19     |    4     |   19
Book 3  |  19     |    4     |   20
Book 3  |  19     |    4     |   21
Book 3  |  19     |    4     |   22

我只是不太确定从哪里开始。

Answer 1

试试这个：

;WITH Counts AS (
    SELECT Max(StartNo + BookSize) AS TotalBookSize
    FROM t
), CTE(Tickets) AS (
    SELECT 1
    UNION ALL
    SELECT Tickets + 1
    FROM CTE
    WHERE Tickets < (SELECT TotalBookSize FROM Counts)
)
SELECT *
FROM t JOIN CTE ON CTE.Tickets BETWEEN t.StartNo AND t.StartNo + t.BookSize - 1

Answer 2

你需要一个数字列表，并将其与书籍合并table

select b.*, number
from Books b
join master.dbo.spt_values v on v.number between b.StartNo AND b.StartNo+b.BookSize-1

Answer 3

使用tally table

WITH lv0 AS (SELECT 0 g UNION ALL SELECT 0 UNION ALL SELECT 0 UNION ALL SELECT 0 UNION ALL SELECT 0 UNION ALL SELECT 0 UNION ALL SELECT 0 UNION ALL SELECT 0 UNION ALL SELECT 0 UNION ALL SELECT 0)
    ,lv1 AS (SELECT 0 g FROM lv0 a CROSS JOIN lv0 b) --10 * 10 =  100
    ,lv2 AS (SELECT 0 g FROM lv1 a CROSS JOIN lv0 b) --100 * 10 = 1000
    ,Tally (num) AS (SELECT ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) FROM lv2)
    SELECT (num+StartNo-1) as TicketNo, *
    FROM   Tally
           CROSS JOIN Yourtable
    WHERE  num <= booksize
    ORDER  BY book

将 header 行扩展为多个 child 行

Expand header row into multiple child rows

sql

sql-server

sql-server-2005