如何在给定记录之前和之后获得记录？

Question

我有以下表结构:

Id, Message
1, John Doe
2, Jane Smith
3, Error
4, Jane Smith

有没有办法获取错误记录和周围的记录？即查找所有错误以及它们之前和之后的记录.

Answer 1

;WITH numberedlogtable AS
(
SELECT Id,Message, 
ROW_NUMBER() OVER (ORDER BY ID) AS RN
 FROM logtable
)

SELECT Id,Message
FROM numberedlogtable
WHERE RN IN (SELECT RN+i
             FROM numberedlogtable
             CROSS JOIN (SELECT -1 AS i UNION ALL SELECT 0 UNION ALL SELECT 1) n
             WHERE Message='Error')

Answer 2

WITH    err AS 
        (
        SELECT  TOP 1 *
        FROM    log
        WHERE   message = 'Error'
        ORDER BY
                id
        ),
        p AS
        (
        SELECT  TOP 1 l.*
        FROM    log
        WHERE   id <
                (
                SELECT  id
                FROM    err
                )
        ORDER BY
                id DESC
        )
SELECT  TOP 3 *
FROM    log
WHERE   id >
        (
        SELECT  id
        FROM    p
        )
ORDER BY
        id