Sql server 将其他列（时间）添加到不同的行

我正在选择具有唯一性的行

SELECT DISTINCT 
    LogContent
FROM   
    [WebAppLog] WITH (NOLOCK)
WHERE  
    LogName = 'frontendErrorLog'

但如何将结果与其他列配对？我想选择unique

LogName

并将其分配给相应的最早

LogTime

，就像在：

SELECT 
    LogTime, LogContent 
FROM   
    [WebAppLog] WITH (NOLOCK) 
WHERE  
    LogName = 'frontendErrorLog'

---

您可以使用

行编号

：

WITH CTE AS
(
    SELECT LogTime, LogContent, 
           rn = ROW_NUMBER() OVER (PARTITION BY LogContent ORDER BY LogTime ASC)
    FROM [WebAppLog] WITH (NOLOCK) 
    WHERE LogName = 'frontendErrorLog'
)
SELECT LogTime, LogContent FROM CTE WHERE rn = 1

@极端的

分组对你有用吗，像这样

SELECT  LogContent,MAX(LogTime) LogTime
FROM    [WebAppLog] WITH (NOLOCK) 
WHERE   LogName = 'frontendErrorLog'
GROUP   BY LogContent

---

这包括不同的吗？