psql I have two tables , table A and Table b. Table A has list of about 60000 customers ID with all their details and Table B had customer is and age for over 500000 rows of customers. I need a query that will take a customer from table a and if that customer exists in table B then insert a yes in a new column in table a. Basically what I want to end up with in table a , is all the customers in this table and if they exist in table B then yes in a column. I.e the final result will be 60000 customers and additional column at the end with yes or no depending if they exist in table B. Any help is appreciate it -- Sent from: http://www.postgresql-archive.org/PostgreSQL-general-f1843780.html
