目前,我有一些数据存储在2个表Call_log(供参考的“ A”)和PEG_LOG(供参考的B)中。在表A中,它存储有关进入我们系统的呼叫的信息,并为每个呼叫提供一个callID。在表B中,它获取呼叫ID,并为流程中的每个步骤添加一个新行。要获取所有可用数据,我必须对A和B进行左连接
Select
Call_Log.IVR_CALL_ID AS CallLogCallID,
Call_Log.CALL_START_DTM AS CallStartTime,
Call_Log.CALL_END_DTM AS CallEndTime,
call_Log.XFER_GROUP AS TransferGroup,
Call_Log.DNIS AS DNIS,
Call_log.ANI AS ANI,
Call_log.XFER_NBR AS TransferNumber,
Call_Log.Caller_data_1 AS CallBackNumber,
Call_Log.Caller_data_2 AS UserID,
Call_Log.Caller_data_3 AS CallerData3,
Call_Log.SERVER AS Server,
Call_Log.PBX_ID AS PBXID,
Call_Log.CTI_ID AS CTIID,
Call_Log.APP AS APP,
Call_Log.LANGUAGE AS LANGUAGE,
Call_Log.XFER_APP AS TransferApp,
Call_Log.XFER_PEG AS TransferPeg,
Call_Log.XFER_STATUS AS TransferStatus,
Call_Log.ON_DUTY_FLAG AS OnDutyFlag,
Call_Log.CALL_HANDLED AS CallHandled,
Call_Log.TRANSFERRED AS Transferred,
PEG_LOG.IVR_CALL_ID AS PEGCallID,
PEG_LOG.SEQ_NBR AS SequenceNumber,
PEG_LOG.APP AS PEGApp,
PEG_LOG.TRANSFERRED AS PEGTransferred,
PEG_LOG.PEG AS PEG,
PEG_LOG.PEG_START_DTM AS PEGStart,
PEG_LOG.PEG_END_DTM AS PEGEnd,
PEG_LOG.RESPONSE AS UserResponse,
PEG_LOG.REQUEST AS Request,
PEG_LOG.RESPONSE_STATUS AS RepsonseStatus
From Call_Log
Left join PEG_LOG ON Call_Log.IVR_CALL_ID = PEG_LOG.IVR_CALL_ID
我需要做的是获取穿过钉1的所有calllogcallID(peg_log.Peg称为peg),然后使用这些calllogid作为过滤器提取所有数据
因此,如果呼叫1通过钉1 2 3 4 5而呼叫2通过钉2 3 4 5和呼叫3经过1 3 4 5,那么我将获得呼叫1和3的所有数据,但不会得到打电话2。
我不能仅基于通过钉1的任何呼叫日志进行过滤,因为我需要存储在其他列中的信息以用于其他通过钉的呼叫。
这确实超出了我对SQL的理解范围,并且我无法找到解决方案。
答案 0 :(得分:1)
根据对我的其他回答@ Clockwork-Muse的评论,我将介绍我的原始方法。
老实说,它似乎更好,所以我可以删除其他答案。尽管我很好奇,但是如果您想同时测试这两种方法,并让我们知道这种方法实际上是否更快?
select CallLogCallID = cl.ivr_call_id,
-- other call_log columns here
SequenceNumber = pl.seq_nbr,
-- other peg_log columns here
from call_log cl
left join peg_log pl on cl.ivr_call_id = pl.ivr_call_id
where exists (
select 0
from peg_log plSub
where cl.ivr_call_id = plSub.ivr_call_id
and plSub.seq_nbr = 1
)
答案 1 :(得分:0)
这些是我要采取的步骤:
下面是一些表示刚才所说内容的代码:
with
callAndPegLogs as (
select CallLogCallID = cl.ivr_call_id,
-- other call_log columns here
SequenceNumber = pl.seq_nbr,
-- other peg_log columns here,
hasPegSeq1 =
max(case when pl.seq_nbr = 1 then 1 else 0 end)
over (partition by cl.ivr_call_id)
from call_log cl
left join peg_log pl on cl.ivr_call_id = pl.ivr_call_id
)
select *
from callAndPegLogs cpl
where hasPegSeq1 = 1
请注意,您可以将窗口函数更改为'min(pl.seq_nbr)'并获得相同的结果,但是使用case语句,可以根据需要更轻松地适应其他序列号。
答案 2 :(得分:0)
这在联接中为peg = 1使用子查询。这是你要的吗?
Declare @Call_log Table
(
IVR_CALL_ID Int,
otherfield VarChar(50)
)
Insert Into @call_log Values
(1,'xxxxx'),
(2,'yyyy'),
(3,'zzzzz'),
(4,'22222'),
(5,'333333')
Declare @Peg_Log Table
(
Id Int,
IVR_CALL_ID Int,
peg Int
)
Insert Into @Peg_log Values
(1,1,1),
(2,2,1),
(3,1,2),
(4,3,3),
(5,5,1)
Select Distinct c.IVR_CALL_ID
From
@Call_Log c Left join
@PEG_LOG p ON c.IVR_CALL_ID = p.IVR_CALL_ID INNER Join
(Select IVR_CALL_ID From @Peg_Log Where peg =1) x ON c.IVR_CALL_ID = x.IVR_CALL_ID
结果:(删除其他列以获得其他列)
IVR_CALL_ID
-----------
1
2
5