mysql - 选择行计数用作任意行 ID

Question

我正在尝试更改当前的 mysql View ，以便在导出 View 时我有一个唯一的行 ID。

我正在尝试找到一种可能使用行号或自动增量函数的方法，但我不知道如何在 View 中执行此操作。

这是查询:

alter view daily_report as SELECT 
@id := @id + 1 as id
,c.extension as Extension
,RESPONSIBLEUSEREXTENSIONID as ExtID
, sum(Duration) as Total_Talk_Time_seconds
, round(sum(Duration) / 60,2) as Total_Talk_Time_minutes
, sum(if(LEGTYPE1 = 1,1,0)) as Total_Outbound   
, sum(if(LEGTYPE1 = 2,1,0)) as Total_Inbound
, sum(if(Answered = 1,0,1)) as Missed_Calls
, count(DISTINCT b.NOTABLECALLID) as Total_Calls
, NOW()
, curdate()
FROM cdrdb.session a
LEFT JOIN cdrdb.callsummary b
        ON a.NOTABLECALLID = b.NOTABLECALLID
LEFT join cdrdb.mxuser c
      ON a.RESPONSIBLEUSEREXTENSIONID = c.EXTENSIONID
      CROSS JOIN (SELECT @id := 0 ) as var
WHERE b.ts >= curdate()
AND c.extension IN (7295,7306,7218,7247,7330,7000,7358)
group by c.extension;

有没有办法在我的 select 语句中使用行计数或其他内容，以便我的 View 具有唯一的行 ID？

Answer 1

使用用户变量

 SELECT @id := @id + 1 as id, <other field>
 FROM ( <your tables> )
 CROSS JOIN (SELECT @id := 0 ) as var