So, if the row is on none of the tables, I'll get a -100. That's fine.
If the row is on T1, say, and not the others, then I'll have one row, where T1.STATUS_TYP and T1.STATUS_START_TS are populate, but the T2, T3, T4 and T5 fields are null.
If the row is on T2, T4 and T5, then again, I'll have...