Can a join field be the same as a join table?
The Input Join Field and the Join Table Field can have different names. If a join field has the same name as a field from the input table, the joined field will be appended with _1 (or _2, or _3, and so on) to make it unique. If values in the Join Table Field are not unique, only the first occurrence of each value will be used.
Can a field be joined based on a number?
If no fields are selected for the optional Transfer Fields parameter, all fields from the Join Table to the output will be joined. Joins can be based on fields of type text, date, or number. Joins based on text fields are case sensitive. Fields of different number formats can be joined as long as the values are equal.
What to do if a join field is not unique?
If values in the Join Table Field are not unique, only the first occurrence of each value will be used. To account for join table values other than the first occurrence, start by executing the Summary Statistics tool using the Join Table as input. Summary Statistics allows you to summarize fields (for example, sum, mean, minimum).
Where does the join field go in ArcGIS?
The Input Table can be a feature class (including shapefile) or a table. All fields in the Input Table will be kept during the join. Optionally, only selected fields from the Join Table will be added to the output. These can be checked under the Join Fields parameter.
How to use the joinfield function in Python?
This stand-alone Python script shows the JoinField function used to join a table to a feature class and only include two of the table’s fields in the join. Feedback on this topic?
Do you have to have the name of the field be the same?
The name of the field does not have to be the same, but the data type has to be the same; you join numbers to numbers, strings to strings, and so on. You can perform a join with either the Join Data dialog box, accessed by right-clicking a layer in ArcMap, or the Add Join tool.