Question

基准表

id line_number
1   1232
2   1456
3   1832
4   2002

我希望将值添加到新表中，以便下一行的值成为新列中的值，最后一行的值相同。

我需要制作的最终输出是：

id line_number   end_line_number
1   1232         1456
2   1456         1832
3   1832         2002
4   2002         2002

数据库是sql server。

真心感谢任何帮助。

由于

Answer 1

在SQL Server 2012之后，您可以像这样使用LEAD。

;WITH BaseTable as 
(
    SELECT 1 id,  1232 line_number
    UNION ALL SELECT 2 ,  1456
    UNION ALL SELECT 3,   1832
    UNION ALL SELECT 4 ,  2002
)
SELECT id,line_number,(LEAD(line_number,1,line_number) OVER(ORDER BY id ASC))
FROM BaseTable

对于以前的版本，请尝试此

;WITH BaseTable as 
(
    SELECT 1 id,  1232 line_number
    UNION ALL SELECT 2 ,  1456
    UNION ALL SELECT 3,   1832
    UNION ALL SELECT 4 ,  2002
), OrderedBaseTable as 
(
SELECT id,line_number,ROW_NUMBER() OVER(ORDER BY id asc) rw
FROM BaseTable
)
SELECT t1.id,t1.line_number,ISNULL(t2.line_number,t1.line_number) next_line_number
FROM OrderedBaseTable t1
LEFT JOIN OrderedBaseTable t2
ON t1.rw = t2.rw - 1

Answer 2

试试这个

 With T as (
    Select id, line_number, Row_Number() OVER(Order By id) + 1 As TempId From TableName)

    Select T1.id, T1.line_number, ISNULL(T2.line_number,T1.line_number) As end_line_number From T T1
    Left Join T T2 on T2.id = T1.TempId

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2 个答案: