Question

I have a problem with the return of a simple query

Table San_ChaveBematech

ID     Chave_Id     Credenciada_Id    Recibo   Impresso
55     571678       10                Test     0

Table San_CadastraBematech

ID     Maquina          Credenciada
5      000FEAB63D89     10
6      003067D6A4E7     10
7      003067D6A4D4     10

Query That I has some problem

SELECT San_ChaveBematech.Recibo
FROM San_ChaveBematech
JOIN San_CadastraBematech
ON San_ChaveBematech.Credenciada_Id = San_CadastraBematech.Credenciada
WHERE San_ChaveBematech.Credenciada_Id = 
       (SELECT top 1 credenciada 
        FROM San_CadastraBematech 
        WHERE maquina = '000FEAB63D89')
AND San_ChaveBematech.Impresso = 0

How It Works

I have an application (Windows Form) where my user will be registered. I’ll save her register in my San_CadastraBematech table. In my web application I can get some keys and, when I get it, I’ll save the data in San_ChaveBematech table. To print it, I do the query that I put here, but look, I have just one register in San_ChaveBematech but my query return the same register 3 times.

Can somebody help me ?

Answer 1

SELECT top 1 Ch.Recibo
  FROM San_ChaveBematech Ch
  JOIN San_CadastraBematech Ca
    ON Ch.Credenciada_Id = Ca.Credenciada
 WHERE Ca.maquina = '000FEAB63D89'
   AND Ch.Impresso = 0;