sql - How to assign default value to empty column -


i working on report builder 6i.

i have 2 tables

1- company_info

2- address_info

comp_addr_code foreign key in company_info table primary key in address_info table.now retrieving data address_table base on comp_address_code.but in cases first 3 columns empty in address_info table.

i want these columns 'x' should displayed.what changes should make in sql statement.my sql statement is:

select comp_code, comp_name, comp_addr_code, company_info, address_info comp_code=:p_comp_code       , comp_addr_code=addr_code

use coalesce, picks first non-null value. i.e. if column value not null, return column value, else return specified default value:

select coalesce(comp_code,'x'),        coalesce(comp_name,'x'), etc

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