SQL Query Comparison Processing Efficiency, Any Better Solution? - sql

Question

I'm working in large set of data about 134 million line i would like to make a select query with a insert in a table.
This is my table SQL script (SQL Fiddle).
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Id | Emitter | EmitterIBAN | Receiver | ReceiverIBAN | Adresss | Value
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1, Ernst, HR53 8827 2118 4692 8207 5, Kimbra, CH20 1042 6T0N MDTG JT47 U, 3256 Arrowood Point 0002, 121.72
2, Keene, SK81 1004 7484 7505 6308 9259, Torrance, RO23 ZWTR OJKK VAU9 T5P4 2GDY, 35197 Green Ridge Way, 82.52
3, Ernst, HR53 8827 2118 4692 8207 5, Kimbra, CH20 1042 6T0N MDTG JT47 U, 3256 Arrowood Point 0048, 51.81
4, Korie, ME43 9833 9830 7367 4239 60,Roy, IL69 9686 1536 8102 2219 165, 5 Swallow Alley, 88.01
5, Ernst, HR53 8827 2118 4692 8207 5, Kimbra, CH20 1042 6T0N MDTG JT47 U, 3256 Arrowood Point 0001, 133.99
6, Charmine, BG92 TOXX 8380 785I JKRQ JS, Sarette, MU67 RYRU 9293 5875 6859 7111 075X HR, 8 Sage Place, 36.30
7, Ernst, HR53 8827 2118 4692 8207 5, Kimbra, CH20 1042 6T0N MDTG JT47 U, 3256 Arrowood Point 0004, 186.99
And i select my data with this query
Select count(1) as NumberOperation,
MAX(Emitter) as EmitterName,
EmitterIban,
MAX(Receiver) as ReceiverName,
ReceiverIban,
MAX(ReceiverAddress) as ReceiverAddress,
SUM([Value]) as SumValues
FROM TableEsperadoceTransaction
Group By EmitterIban,
ReceiverIban
And i get the following result
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
NumberOperation | Emitter | EmitterIBAN | Receiver | ReceiverIBAN | Adresss | SumValue
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
4, Ernst, HR53 8827 2118 4692 8207 5, Kimbra, CH20 1042 6T0N MDTG JT47 U, 3256 Arrowood Point 0002, 494,51
1, Keene, SK81 1004 7484 7505 6308 9259, Torrance, RO23 ZWTR OJKK VAU9 T5P4 2GDY, 35197 Green Ridge Way, 82.52
1, Korie, ME43 9833 9830 7367 4239 60,Roy, IL69 9686 1536 8102 2219 165, 5 Swallow Alley, 88.01
1, Charmine, BG92 TOXX 8380 785I JKRQ JS, Sarette, MU67 RYRU 9293 5875 6859 7111 075X HR, 8 Sage Place, 36.30
I also have this solution
SELECT DISTINCT *
FROM (SELECT Count(1) AS NumberOperation,
emitteriban AS _EmitterIban,
receiveriban AS _ReceiverIban,
Sum([value]) AS SumValues
FROM tableesperadocetransaction
GROUP BY emitteriban,
receiveriban) tmp_T
LEFT JOIN tableesperadocetransaction
ON tableesperadocetransaction.emitteriban = tmp_T._emitteriban
AND tableesperadocetransaction.receiveriban =
tmp_T._receiveriban
And i would like to know what's the best solution between this two and if there's query more efficient than that?
Thanks

Answer 1

The second query is slower because:
It has a LEFT JOIN
It has a sub-query
It has a SELECT DISTINCT
Has a * instead of column names
The first one is the most natural way of doing this.
There is a lot about how to improve performance of queries and what to avoid. See for example: MSDN on improving queries

Answer 2

The 1st query should be far more efficient.
If you really want to speed things up, you'll want to make sure you have a covering index with EmitterIban, ReceiverIban as the key.

Answer 3

You can try this.
You get MIN(id), after use it for INNER JOIN. That is also a way.
SELECT
tmp.NumberOperation
,tb.Emitter
,tmp.EmitterIban
,tb.Receiver
,tmp.ReceiverIban
,tb.Adresss
,tmp.SumValues
FROM (SELECT Count(1) AS NumberOperation,
emitteriban AS EmitterIban,
receiveriban AS ReceiverIban,
Sum([value]) AS SumValues,
MIN(Id) AS Id
FROM tableesperadocetransaction
GROUP BY emitteriban,
receiveriban) tmp
INNER JOIN tableesperadocetransaction tb
ON tableesperadocetransaction.id = tmp.Id