restricción de violación de clave 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"; 

Esta consulta sólo toma los datos de los datos del cliente (Tabla 1) y de insertarlo en otra tabla2 (account_details)

cuando esta consulta es despedido por primera vez que trabaja muy bien

pero cuando se dispara por segunda vez, muestra el error Violación de la restricción PRIMARY KEY 'PK_account_details'. No se puede insertar la clave duplicada en el objeto 'dbo.account_details'.

alguna idea para omitir datos existentes en (account_details) tabla1 y la inserción de nuevos datos en la siguiente fila

Answer 1

El uso de un LEFT JOIN le permite excluir todas las filas que ya están presentes en la tabla account details. Una alternativa a esto (y probablemente incluso más rápido) es usar un NOT EXISTS.

utilizando 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   

utilizando una es la clave principal 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

asumiendo ACCOUNT_NUMBER, esto debería funcionar

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