Postgresql, get string after multiple ':' character -


i have following column entries

01:02:02:02 02:01:100:300 128:02:12:02

input

i need way choose parts want display 

01:02:02 02:01:100 128:02:12

output or

01:02 02:01 128:02

i tried suggested solutions in similar questions without success like

select substring(column_name, '[^:]*$') table_name;

how work?

to first 3 parts, can use

select substring(column_name '^(([^:]*:){2}[^:]*)') table_name;

for first 2 parts, omit {2}. first 4 parts, make {3}.


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