IF you want to insert some data into a table without want to write column name.

INSERT INTO CUSTOMER_INFO
   (SELECT CUSTOMER_NAME,
           MOBILE_NO,
           ADDRESS
      FROM OWNER_INFO cm
     WHERE ID>100)

Where the tables are:

            CUSTOMER_INFO               ||            OWNER_INFO
----------------------------------------||-------------------------------------
CUSTOMER_NAME | MOBILE_NO | ADDRESS     || CUSTOMER_NAME | MOBILE_NO | ADDRESS 
--------------|-----------|---------    || --------------|-----------|--------- 
      A       |     +1    |   DC        ||       B       |     +55   |   RR  

Result:

            CUSTOMER_INFO               ||            OWNER_INFO
----------------------------------------||-------------------------------------
CUSTOMER_NAME | MOBILE_NO | ADDRESS     || CUSTOMER_NAME | MOBILE_NO | ADDRESS 
--------------|-----------|---------    || --------------|-----------|--------- 
      A       |     +1    |   DC        ||       B       |     +55   |   RR
      B       |     +55   |   RR        ||

IF you want to insert some data into a table without want to write column name.

INSERT INTO CUSTOMER_INFO
   (SELECT CUSTOMER_NAME,
           MOBILE_NO,
           ADDRESS
      FROM OWNER_INFO cm)

Where the tables are:

            CUSTOMER_INFO               ||            OWNER_INFO
----------------------------------------||-------------------------------------
CUSTOMER_NAME | MOBILE_NO | ADDRESS     || CUSTOMER_NAME | MOBILE_NO | ADDRESS 
--------------|-----------|---------    || --------------|-----------|--------- 
      A       |     +1    |   DC        ||       B       |     +55   |   RR  

Result:

            CUSTOMER_INFO               ||            OWNER_INFO
----------------------------------------||-------------------------------------
CUSTOMER_NAME | MOBILE_NO | ADDRESS     || CUSTOMER_NAME | MOBILE_NO | ADDRESS 
--------------|-----------|---------    || --------------|-----------|--------- 
      A       |     +1    |   DC        ||       B       |     +55   |   RR
      B       |     +55   |   RR        ||