Prerequisites
Before joining features, please make sure the following has been done:
1. You are the owner of feature layer 1
2. You are the owner of feature layer 2
3. You know which Platform folder you can access
Steps
1. Navigate to the desired Web Map Item Details
2. Click Open in Map Viewer
3. See the Web Map
4. Click Analysis
4. See Perform Analysis sidebar
5. Click Summarize Data
6. See Summarize Data
7. Click Join Features
8. See the Join Features Steps
9. Choose your target layer (layer 1 mentioned in the pre-steps)
Note: This will be your geometry layer in this example
10. Choose your join layer (layer 2 mentioned in the pre-steps)
Note: This will be your survey layer in this example
11. Select the Join Type, Choose the fields to match
Note: This example bases the join on fields (tables) and not on geometry (spatial)
12. Select the fields to join
a. Select GlobalID (layer 1)
b. Select collectorID (layer 2)
13. Choose Join Operation, Join one to many
Note: This example uses a one to many relationship but you could use a one to one relationship for other reasons
14. Name the join and select the folder to save the join in (remember the folder from the pre-steps)
15. Uncheck Use current map extent and check Create results as hosted feature layer view
16. Click Run Analysis
17. See your newly created Feature Layer in the Contents sidebar of the Web Map with the other Feature Layers