如何将列值转换为行 PostgreSQL

Question

This is my query:

SELECT * FROM profile_change_set where id = '1558079b-d954-4a0d-b241-b39fe8f3498c';

id	table_name	column_key	column_value	operation_type
1558079b-d954-4a0d-b241-b39fe8f3498c	farmers	smsEnabled	somvalue	update

What is want is to convert all values into rows.

column_key	column_value
id	1558079b-d954-4a0d-b241-b39fe8f3498c
table_name	farmers
column_key	smsEnabled
column_value	somvalue
operation_type	update

Any help, thank you in advance.

Answer 1

You can use JSON features to turn columns into rows:

select cols.*
from profile_change_set pcs
  cross join jsonb_each_text(to_jsonb(pcs)) as cols(column_key, column_value)
where pcs.id = ...;

Answer 2

Try use table function CROSSTAB (analogue PIVOT function in SQL Server)

And take a look at this answer , in that answer, an intermediate table is used as a variable, and after that on this variable use CROSSTAB. Take a look at this way