sql - replacing multiple units of specific character with one unit in hive -

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i have dataset in values same except number of semicolons in resulting different records.

for example if in column 1 records has a;b;c , record has a;;b;c, disabling use of distinct function in code. want treated duplicate record ;; needs replaced ;

how can replace multiple ; single ; in strings in dataset in hive?

you can use regexp_replace defined in hive udfs

the first argument string needs changed. can call on table : 

with t     (select "a\;\;\;b\;\;c\;d" col )  select regexp_replace(t.col, "\;+", "\;") col t

this should give output

+-------+ |    col| +-------+ |a;b;c;d| +-------+




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