vincolo di violazione di chiave primaria

Question

string sqlInsert = "Insert into account_details(
    account_number, 
    account_type, 
    transfer_access_code, 
    account_balance, 
    customer_id) 
SELECT 
    account_number, 
    account_type, 
    transfer_access_code, 
    account_balance, 
    customer_id 
from customer_details"; 

Questa query richiede solo i dati da dati del cliente (Tabella 1) e inserire di in altri table2 (account_details)

quando questa query viene licenziato per la prima volta funziona bene

ma quando viene sparato una seconda volta mostra l'errore Violazione del vincolo PRIMARY KEY "PK_account_details". Impossibile inserire la chiave duplicata nell'oggetto "dbo.account_details".

alcuna idea di omettere dati esistenti (account_details) tabla1 ed inserendo i nuovi dati nella riga successiva

Answer 1

Utilizzando una LEFT JOIN permette di escludere tutte le righe che sono già presenti nella tabella account details. Un'alternativa a questo (e probabilmente anche più veloce) sta usando un NOT EXISTS.

utilizzando un LEFT JOIN

INSERT INTO account_details (
    account_number 
    , account_type 
    , transfer_access_code 
    , account_balance 
    , customer_id) 
SELECT account_number 
     , account_type 
     , transfer_access_code 
     , account_balance 
     , customer_id 
FROM customer_details cd 
     LEFT OUTER JOIN account_details ad ON ad.Account_number = cd.account_number 
WHERE ad.account_number IS NULL   

utilizzando una è la chiave primaria NOT EXISTS

INSERT INTO account_details (
    account_number 
    , account_type 
    , transfer_access_code 
    , account_balance 
    , customer_id) 
SELECT account_number 
     , account_type 
     , transfer_access_code 
     , account_balance 
     , customer_id 
FROM customer_details cd 
WHERE NOT EXISTS (
      SELECT * 
      FROM  account_details 
      WHERE account_number = cd.account_number) 

Answer 2

assumendo ACCOUNT_NUMBER, questo dovrebbe funzionare

string sqlInsert = "Insert into account_details(
    account_number, 
    account_type, 
    transfer_access_code, 
    account_balance, 
    customer_id) 
SELECT 
    cd.account_number, 
    cd.account_type, 
    cd.transfer_access_code, 
    cd.account_balance, 
    cd.customer_id 
from customer_details cd 
left outer join account_details ad 
    on cd.account_number = ad.account_number 
where ad.account_number is NULL"; 

Answer 3

INSERT INTO account_details (ad.account_number, ad.account_type, 
    ad.transfer_access_code, ad.account_balance, ad.customer_id) 
SELECT cd.account_number, cd.account_type, 
    cd.transfer_access_code, cd.account_balance, cd.customer_id 
FROM customer_details cd 
LEFT OUTER JOIN account_details ad 
    ON cd.account_number = ad.account_number 
WHERE ad.account_number is NULL