Question

I have two tables

Registry

ClientID  Name  Incube
----------------------
1         Joe    as
2         Jack   gt
3         Jor    ee

Deposit

DepositID  ClientID Quantum
----------------------------
1                1    100.45 
2                1    34.5
3                1    22.0
4                2    1000.0

I want to get only one result, this is
The Name, Incube from table Registry and the sum of all deposits made by that person all corresponfing to a certain ClientID

First I was doing 2 queries

SELECT [Name],[Incube] FROM Registry WHERE [ClientID] = 1;
SELECT DISTINCTROW Sum([Deposit].[Quantum]) As Total FROM Deposit WHERE [ClienteID] = 1;

then I did a left join to get all things more easy

SELECT 
[a].[ClientID],
[a].[Name],
[a].[Incube],
Sum([b].[Quantum]) as Total
FROM Registry a
LEFT JOIN Deposit b 
ON a.ClientID=b.ClientID 
group by a.Name, a.ClientID, a.Incube;

How do I filter de WHERE clause? I want to get all data of ClientID=1, NOT ALL, And the question here is how to only compute only the necessary ClientID and not all the clientsID?

Answer 1

Unless I am missing something you just need to add the WHERE clause:

SELECT 
  [a].[ClientID],
  [a].[Name],
  [a].[Incube],
  Sum([b].[Quantum]) as Total
FROM Registry a
LEFT JOIN Deposit b 
  ON a.ClientID=b.ClientID 
where a.clientid = 1
group by a.Name, a.ClientID, a.Incube;

See SQL Fiddle with Demo

The result is:

| CLIENTID | NAME | INCUBE |  TOTAL |
-------------------------------------
|        1 |  Joe |     as | 156.95 |