What we need to do if we are facing 1.) 818 2.) 811 sql errorcodes for Db2.
Please describe in detail for both of these.

Thanks

Generally we will get -811 when the select query retrieves more than one row. So re move the duplicate row or if needed ues cursor to avoid -811 for 818 the precompiler generated timestamp x in the load module is different from the bind timestamp y built from the dbrm z. So bind the application again, using the dbrm for the application program that matches the object module.