How to write sub-query using WITH in PostgreSQL2019 Community Moderator ElectionKeeping it simple and how to do multiple CTE in a querySQL Server CTE referred in self joins slowCTE with Group By returning the same results as basic queryRecursive References are not allowed in Sub_queries T-SQLPostgreSQL CTE/Sub-Query with generate_series performance issuesMaximum of COUNT by group and joining on EQUALS and NOT EQUALS conditionHow to join CTE query with another table in SQL Server 2008CTE Execution OrderImprove performance on CTE with sub-queriesRecursive CTEs to pull BOM (Bill of Material)
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How to write sub-query using WITH in PostgreSQL
2019 Community Moderator ElectionKeeping it simple and how to do multiple CTE in a querySQL Server CTE referred in self joins slowCTE with Group By returning the same results as basic queryRecursive References are not allowed in Sub_queries T-SQLPostgreSQL CTE/Sub-Query with generate_series performance issuesMaximum of COUNT by group and joining on EQUALS and NOT EQUALS conditionHow to join CTE query with another table in SQL Server 2008CTE Execution OrderImprove performance on CTE with sub-queriesRecursive CTEs to pull BOM (Bill of Material)
I am trying to get twitter data of narendramodi using below command.
SELECT b.t_id,a.profile_image,b.tweet_text,e.media_media_url,b.retweet_count,b.favorite_count as like_count,count(reply_to_status_id) as reply_count,f.tweet_impression_count,f.tweet_engagement_count,f.tweet_engagement_rate
FROM twitter_users a LEFT JOIN twitter_tweets b on a.user_id=b.user_id
LEFT JOIN twitter_tweet_replies c on b.t_id = c.t_id
LEFT JOIN twitter_tweet_media e on b.t_id = e.t_id
LEFT JOIN twitter_tweet_metric_aggregates f on f.metric_timestamp=
(select max(metric_timestamp) FROM twitter_tweet_metric_aggregates g
WHERE g.t_id=f.t_id and g.t_id=b.t_id)
WHERE a.twitter_screen_name= 'narendramodi'
GROUP BY b.t_id,a.profile_image
,b.tweet_text,b.retweet_count,b.favorite_count,
e.media_media_url,f.imp_count,f.eng_count,f.eng_rate);
Query was working correctly But, in the above query I have used sub-select to get recent data of imp_counts based on timestamp. Because of that Query_cost was huge and so it was taking more than 15min for query execution. I want to reduce that and should able to execute within 10seconds. For that reason I was trying to use WITH (CTE) expression.
Here it is
WITH metric_counts AS (
SELECT max(metric_timestamp),f.t_id
FROM twitter_tweet_metric_aggregates f LEFT JOIN twitter_tweets b on
f.t_id=b.t_id
)
SELECT
b.t_id,a.profile_image,b.tweet_text,e.media_media_url,b.retweet_count
,b.favorite_count as like_count, count(reply_to_status_id) as
reply_count,metric_counts.imp_count
,metric_counts.eng_count,metric_counts.eng_rate
FROM twitter_users as a
LEFT JOIN twitter_tweets as b on a.twitter_user_id=b.twitter_user_id
LEFT JOIN twitter_tweet_replies c on b.t_id = c.t_id
LEFT JOIN twitter_tweet_media e on b.t_id = e.t_id
LEFT JOIN metric_counts on metric_counts.t_id = b.t_id WHERE
lower(a.twitter_screen_name)=lower('narendramodi')
GROUP BY b.t_id,a.profile_image,b.tweet_text,e.media_media_url,
b.retweet_count,b.favorite_count,
metric_counts.imp_count,metric_counts.eng_count,
metric_counts.eng_rate;
The query was executing but it is not giving imp_count,eng_count,eng_rate values from that particular table.
NOTE : If I remove that sub-select query was executing within 10sec.But I want that also to be included. For that I have used WITH but failing. So can anyone help me out on how to write first query using WITH expression.
common-table-expression postgresql-9.4
add a comment |
I am trying to get twitter data of narendramodi using below command.
SELECT b.t_id,a.profile_image,b.tweet_text,e.media_media_url,b.retweet_count,b.favorite_count as like_count,count(reply_to_status_id) as reply_count,f.tweet_impression_count,f.tweet_engagement_count,f.tweet_engagement_rate
FROM twitter_users a LEFT JOIN twitter_tweets b on a.user_id=b.user_id
LEFT JOIN twitter_tweet_replies c on b.t_id = c.t_id
LEFT JOIN twitter_tweet_media e on b.t_id = e.t_id
LEFT JOIN twitter_tweet_metric_aggregates f on f.metric_timestamp=
(select max(metric_timestamp) FROM twitter_tweet_metric_aggregates g
WHERE g.t_id=f.t_id and g.t_id=b.t_id)
WHERE a.twitter_screen_name= 'narendramodi'
GROUP BY b.t_id,a.profile_image
,b.tweet_text,b.retweet_count,b.favorite_count,
e.media_media_url,f.imp_count,f.eng_count,f.eng_rate);
Query was working correctly But, in the above query I have used sub-select to get recent data of imp_counts based on timestamp. Because of that Query_cost was huge and so it was taking more than 15min for query execution. I want to reduce that and should able to execute within 10seconds. For that reason I was trying to use WITH (CTE) expression.
Here it is
WITH metric_counts AS (
SELECT max(metric_timestamp),f.t_id
FROM twitter_tweet_metric_aggregates f LEFT JOIN twitter_tweets b on
f.t_id=b.t_id
)
SELECT
b.t_id,a.profile_image,b.tweet_text,e.media_media_url,b.retweet_count
,b.favorite_count as like_count, count(reply_to_status_id) as
reply_count,metric_counts.imp_count
,metric_counts.eng_count,metric_counts.eng_rate
FROM twitter_users as a
LEFT JOIN twitter_tweets as b on a.twitter_user_id=b.twitter_user_id
LEFT JOIN twitter_tweet_replies c on b.t_id = c.t_id
LEFT JOIN twitter_tweet_media e on b.t_id = e.t_id
LEFT JOIN metric_counts on metric_counts.t_id = b.t_id WHERE
lower(a.twitter_screen_name)=lower('narendramodi')
GROUP BY b.t_id,a.profile_image,b.tweet_text,e.media_media_url,
b.retweet_count,b.favorite_count,
metric_counts.imp_count,metric_counts.eng_count,
metric_counts.eng_rate;
The query was executing but it is not giving imp_count,eng_count,eng_rate values from that particular table.
NOTE : If I remove that sub-select query was executing within 10sec.But I want that also to be included. For that I have used WITH but failing. So can anyone help me out on how to write first query using WITH expression.
common-table-expression postgresql-9.4
add a comment |
I am trying to get twitter data of narendramodi using below command.
SELECT b.t_id,a.profile_image,b.tweet_text,e.media_media_url,b.retweet_count,b.favorite_count as like_count,count(reply_to_status_id) as reply_count,f.tweet_impression_count,f.tweet_engagement_count,f.tweet_engagement_rate
FROM twitter_users a LEFT JOIN twitter_tweets b on a.user_id=b.user_id
LEFT JOIN twitter_tweet_replies c on b.t_id = c.t_id
LEFT JOIN twitter_tweet_media e on b.t_id = e.t_id
LEFT JOIN twitter_tweet_metric_aggregates f on f.metric_timestamp=
(select max(metric_timestamp) FROM twitter_tweet_metric_aggregates g
WHERE g.t_id=f.t_id and g.t_id=b.t_id)
WHERE a.twitter_screen_name= 'narendramodi'
GROUP BY b.t_id,a.profile_image
,b.tweet_text,b.retweet_count,b.favorite_count,
e.media_media_url,f.imp_count,f.eng_count,f.eng_rate);
Query was working correctly But, in the above query I have used sub-select to get recent data of imp_counts based on timestamp. Because of that Query_cost was huge and so it was taking more than 15min for query execution. I want to reduce that and should able to execute within 10seconds. For that reason I was trying to use WITH (CTE) expression.
Here it is
WITH metric_counts AS (
SELECT max(metric_timestamp),f.t_id
FROM twitter_tweet_metric_aggregates f LEFT JOIN twitter_tweets b on
f.t_id=b.t_id
)
SELECT
b.t_id,a.profile_image,b.tweet_text,e.media_media_url,b.retweet_count
,b.favorite_count as like_count, count(reply_to_status_id) as
reply_count,metric_counts.imp_count
,metric_counts.eng_count,metric_counts.eng_rate
FROM twitter_users as a
LEFT JOIN twitter_tweets as b on a.twitter_user_id=b.twitter_user_id
LEFT JOIN twitter_tweet_replies c on b.t_id = c.t_id
LEFT JOIN twitter_tweet_media e on b.t_id = e.t_id
LEFT JOIN metric_counts on metric_counts.t_id = b.t_id WHERE
lower(a.twitter_screen_name)=lower('narendramodi')
GROUP BY b.t_id,a.profile_image,b.tweet_text,e.media_media_url,
b.retweet_count,b.favorite_count,
metric_counts.imp_count,metric_counts.eng_count,
metric_counts.eng_rate;
The query was executing but it is not giving imp_count,eng_count,eng_rate values from that particular table.
NOTE : If I remove that sub-select query was executing within 10sec.But I want that also to be included. For that I have used WITH but failing. So can anyone help me out on how to write first query using WITH expression.
common-table-expression postgresql-9.4
I am trying to get twitter data of narendramodi using below command.
SELECT b.t_id,a.profile_image,b.tweet_text,e.media_media_url,b.retweet_count,b.favorite_count as like_count,count(reply_to_status_id) as reply_count,f.tweet_impression_count,f.tweet_engagement_count,f.tweet_engagement_rate
FROM twitter_users a LEFT JOIN twitter_tweets b on a.user_id=b.user_id
LEFT JOIN twitter_tweet_replies c on b.t_id = c.t_id
LEFT JOIN twitter_tweet_media e on b.t_id = e.t_id
LEFT JOIN twitter_tweet_metric_aggregates f on f.metric_timestamp=
(select max(metric_timestamp) FROM twitter_tweet_metric_aggregates g
WHERE g.t_id=f.t_id and g.t_id=b.t_id)
WHERE a.twitter_screen_name= 'narendramodi'
GROUP BY b.t_id,a.profile_image
,b.tweet_text,b.retweet_count,b.favorite_count,
e.media_media_url,f.imp_count,f.eng_count,f.eng_rate);
Query was working correctly But, in the above query I have used sub-select to get recent data of imp_counts based on timestamp. Because of that Query_cost was huge and so it was taking more than 15min for query execution. I want to reduce that and should able to execute within 10seconds. For that reason I was trying to use WITH (CTE) expression.
Here it is
WITH metric_counts AS (
SELECT max(metric_timestamp),f.t_id
FROM twitter_tweet_metric_aggregates f LEFT JOIN twitter_tweets b on
f.t_id=b.t_id
)
SELECT
b.t_id,a.profile_image,b.tweet_text,e.media_media_url,b.retweet_count
,b.favorite_count as like_count, count(reply_to_status_id) as
reply_count,metric_counts.imp_count
,metric_counts.eng_count,metric_counts.eng_rate
FROM twitter_users as a
LEFT JOIN twitter_tweets as b on a.twitter_user_id=b.twitter_user_id
LEFT JOIN twitter_tweet_replies c on b.t_id = c.t_id
LEFT JOIN twitter_tweet_media e on b.t_id = e.t_id
LEFT JOIN metric_counts on metric_counts.t_id = b.t_id WHERE
lower(a.twitter_screen_name)=lower('narendramodi')
GROUP BY b.t_id,a.profile_image,b.tweet_text,e.media_media_url,
b.retweet_count,b.favorite_count,
metric_counts.imp_count,metric_counts.eng_count,
metric_counts.eng_rate;
The query was executing but it is not giving imp_count,eng_count,eng_rate values from that particular table.
NOTE : If I remove that sub-select query was executing within 10sec.But I want that also to be included. For that I have used WITH but failing. So can anyone help me out on how to write first query using WITH expression.
common-table-expression postgresql-9.4
common-table-expression postgresql-9.4
edited Mar 7 at 4:53
bunny sunny
asked Mar 6 at 4:11
bunny sunnybunny sunny
74111
74111
add a comment |
add a comment |
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