Using postgres to select a filtered array
I'm looking to select data from a table that contains an ID, and an array of values. But in the query results, i want to filter the array and remove values that overlap with a white list.
For illustrative purposes, the following query shows how the data would be formatted with a whitelist of values in a single column, and then a table i want to select from that contains a unique ID, and the array of keywords.
with whitelist as (
select distinct unnest(array['a','b','c','f','h']) as keywords
), raw_with_keyword_array as (
select * from (
values
('1234', array['a','c','e','h','q']),
('1235', array['a','d','e','f'])
) as t (id, keyword_array)
)
select...
The expected results i'm looking for is two rows from the raw_with_keyword_array table, but filtered arrays not including the values from the whitelist.
E.g.
1234 {e, q}
1235 {d, e}
postgresql query array
asked 4 mins ago
Rob AlfordRob Alford
1
New contributor
Rob Alford is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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add a comment |
I'm looking to select data from a table that contains an ID, and an array of values. But in the query results, i want to filter the array and remove values that overlap with a white list.
For illustrative purposes, the following query shows how the data would be formatted with a whitelist of values in a single column, and then a table i want to select from that contains a unique ID, and the array of keywords.
with whitelist as (
select distinct unnest(array['a','b','c','f','h']) as keywords
), raw_with_keyword_array as (
select * from (
values
('1234', array['a','c','e','h','q']),
('1235', array['a','d','e','f'])
) as t (id, keyword_array)
)
select...
The expected results i'm looking for is two rows from the raw_with_keyword_array table, but filtered arrays not including the values from the whitelist.
E.g.
1234 {e, q}
1235 {d, e}
postgresql query array
asked 4 mins ago
Rob AlfordRob Alford
1
New contributor
Rob Alford is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I'm looking to select data from a table that contains an ID, and an array of values. But in the query results, i want to filter the array and remove values that overlap with a white list.
For illustrative purposes, the following query shows how the data would be formatted with a whitelist of values in a single column, and then a table i want to select from that contains a unique ID, and the array of keywords.
with whitelist as (
select distinct unnest(array['a','b','c','f','h']) as keywords
), raw_with_keyword_array as (
select * from (
values
('1234', array['a','c','e','h','q']),
('1235', array['a','d','e','f'])
) as t (id, keyword_array)
)
select...
The expected results i'm looking for is two rows from the raw_with_keyword_array table, but filtered arrays not including the values from the whitelist.
E.g.
1234 {e, q}
1235 {d, e}
postgresql query array
asked 4 mins ago
Rob AlfordRob Alford
1
New contributor
Rob Alford is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I'm looking to select data from a table that contains an ID, and an array of values. But in the query results, i want to filter the array and remove values that overlap with a white list.
For illustrative purposes, the following query shows how the data would be formatted with a whitelist of values in a single column, and then a table i want to select from that contains a unique ID, and the array of keywords.
with whitelist as (
select distinct unnest(array['a','b','c','f','h']) as keywords
), raw_with_keyword_array as (
select * from (
values
('1234', array['a','c','e','h','q']),
('1235', array['a','d','e','f'])
) as t (id, keyword_array)
)
select...
The expected results i'm looking for is two rows from the raw_with_keyword_array table, but filtered arrays not including the values from the whitelist.
E.g.
1234 {e, q}
1235 {d, e}
postgresql query array
postgresql query array
asked 4 mins ago
Rob AlfordRob Alford
1
New contributor
Rob Alford is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 mins ago
Rob AlfordRob Alford
1
New contributor
Rob Alford is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 mins ago
Rob AlfordRob Alford
1
New contributor
Rob Alford is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 mins ago
Rob AlfordRob Alford
1
asked 4 mins ago
Rob AlfordRob Alford
1
1
New contributor
Rob Alford is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Rob Alford is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Rob Alford is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
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