turn the distinct value of columns into a rows postgres

Question

I have a schema like:

 [ad_id] . [name] . [valueofname]
   1 .       name .   \"brian\"
   1 .       age  .    \"23\"
   2 .       job  .    \"IT\"
   2 .                


        

Answer 1

You can use conditional aggregation:

select ad_id,
       max(case when name = 'name' then valueofname end) as name,
       max(case when name = 'age' then valueofname end) as age,
       max(case when name = 'birthday' then valueofname end) as birthday,
       max(case when name = 'job' then valueofname end) as job
from t
group by ad_id;

In SQL Server, you can also do something similar with pivot.