How can we check the data already exists in database

Question

hi friends
i am trying create one procedure to add customers in database with customer id as input parameter..but if in the database customer detail already exists than i would like to update that detail and if its not in the database than i would like to add that detail in the databse...how could i do this ...
any help wpould be appreciate
thanks
rommy

Answer 1

Hi,
If your requirement is to insert in one table and if the record exists insert into other table the merge statement doesn't work
Example (please check the column name and parameter names). I don't put commit or rollback because I don't know if you control the transaction inside this procedure or outside it.
CREATE OR REPLACE PROCEDURE add_cust(I_CUST_ID        IN VARCHAR2,
                                     I_CUST_F_NAME    IN VARCHAR2,
                                     I_CUST_L_NAME    IN VARCHAR2,
                                     I_CUST_ADD       IN VARCHAR2,
                                     I_CUST_CITY      IN VARCHAR2,
                                     I_CUST_STATE     IN VARCHAR2,
                                     I_CUST_ZIP       IN VARCHAR2,
                                     I_CUST_DOB       IN DATE,
                                     I_CUST_          IN VARCHAR2,
                                     I_CUST_ACCT_TYPE IN VARCHAR2,
                                     I_START_BAL      IN NUMBER) IS
BEGIN
   INSERT INTO CUSTOMERS C
      (CUST_ID,
       CUST_F_NAME,
       CUST_L_NAME,
       CUST_ADD,
       CUST_CITY,
       CUST_STATE,
       CUST_ZIP,
       CUST_DOB,
       CUST_)
   VALUES
      (I_CUST_ID,
       I_CUST_F_NAME,
       I_CUST_L_NAME,
       I_CUST_ADD,
       I_CUST_CITY,
       I_CUST_STATE,
       I_CUST_ZIP,
       I_CUST_DOB,
       I_CUST_);
EXCEPTION
   WHEN DUP_VAL_ON_INDEX THEN
      INSERT INTO CUSTOMER_ACCT
         (CUST_ID,
          CUST_ACCT_NO,
          cust_acct_type)
      VALUES
         (I_CUST_ID,
          CUST_ACCT_SEQ.NEXTVAL, -- CUST_ACCT_SEQ is a sequence, isn't?
          I_CUST_ACCT_TYPE);
END add_cust;Regards,