Question

是否有T-SQL语句自动填充表中的空列，其值从一个特定值开始递增？

E.g。

UPDATE A SET A.NO = ROW_NUMBER() OVER (ORDER BY A.NO) + @max WHERE A.NO is NULL

这句话不起作用，我不知道如何让它运行......

感谢任何帮助！

Answer 1

WITH    q AS
        (
        SELECT  a.*, MAX(no) OVER() + ROW_NUMBER() OVER (ORDER BY a.no) AS rn
        FROM    a
        )
UPDATE  q
SET     no = rn

Answer 2

这很有效。您需要将排名函数与更新

分离

UPDATE
    bar
SET
    NO = bar.foo + @max
FROM
    (SELECT
         A.NO,
         ROW_NUMBER() OVER (ORDER BY A.NO) AS foo
     FROM
         A
     WHERE
         A.NO is NULL
     ) bar

通过SP增加MS SQL Server表中的int列

2 个答案: