I Have two Datas: occurrence and Cod. occurrence. In the occurrence, I have codes (unique) and the description of these codes. In the Cod. ocurrence I have several events related to these codes, limited to one subcode.
Cod=600 // Description=asset breakdown
Cod=300 // Description=Operational problems
Cod=600 // ID=MB // Evidence=monitor break
Cod=600 // ID=SP // Evidence=Server slowdown
Cod=300 // ID=AP // Evidence=Failure to meet deadlines
I need that, when selecting a dropdown with a COD 600, a second Dropdown will filter only the IDs related to the 600 (MP,SP).