I'm new to Presto and looking to get the same functionality as the group_concat function in MySQL. Are the following two equivalent? If not, any suggestions for how I can recreate the group_concat functionality in Presto?

MySQL:

select

a,

group_concat(b separator ',')

from table

group by a

Presto:

select

a,

array_join(array_agg(b), ',')

from table

group by a

(Found this as a suggested Presto workaround here when searching group_concat functionality.)

解決方案

Try using this in place of group_concat in Presto ::

select

a,

array_join(array_agg(b), ',')

from table

group by a

總結

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