Topic: Comparing of fields with the user types
Tell please why there can be such error at performance of a following code:
select o.sch_op from OP_SCH o join syn$OP_SCH o2 on o.op_sch_id=o2.op_sch_id where o2.sch_op <> o.sch_op
Also there is an error:
Incompatible data types: it is expected - it is received U.TSCHED
Dear experts, prompt please why so can be...?