Hello Kukiejko.
You mean that you can only update a dataset with time is not null? First, you should not use a column-name like "time". In this case you mean ID 233 is possible and ID 234 not? If you use a trigger, you'll never can update the time-column because it is never possible if the old time-value is null and the new is not null. . before update . If(old.time is null and new.time is not null) then Begin New.time = old.time Exception.. End Or would you only update the time column for the record with the next ID after last time-filled-record? -------- Hello, I use Firebird 2.5 for Windows. I need to create UPDATE TRIGGER for Table A, but UPDATE for the Table A for row ID=x is only possible if TIME column for ID<x is >not< [null]. For example I can update Time column for row ID=234 but it should be not possible to update Time column for row ID=235. How can I do it on the Firebird server (using eg. Trigger, functions or procedures)? -------------------------------------------- TABLE A: ID | TIME ========================================== 229 | 07.06.2013, 18:06:35.871 230 | 07.06.2013, 16:42:52.941 231 | 07.06.2013, 16:42:53.286 233 | 07.06.2013, 16:42:53.607 234 | [null] 235 | [null] 236 | [null] ------------------------------------------ Thank you for any feedback or example Kukiejko [Non-text portions of this message have been removed]
