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This query will give you a list of email addresses and how many times they're used, with the most used addresses first. SELECT email, count(*) AS c. FROM TABLE. GROUP BY email. HAVING c > 1. ORDER BY c DESC. If you want the full rows: select * from table where email in (.
30 lis 2013 · I need to find out the records where the article_title data is the same on more than one record. Here's what I've got: select a.* from articles a where a.article_title = (select article_title from articles where article_title = a.article_title AND a.id <> articles.id)
22 lis 2021 · I recommend aggregation with the having clause, because it is the most flexible approach. sum(id = 4) > 0 -- has id = 4. What this is doing is aggregating by score. Then the first part of the having clause (sum(id = 2)) is counting up how many "2"s there are per score. The second is counting up how many "4"s.
18 paź 2017 · I want to extract the consecutive rows with the same status. For example, I want to see the time spent by a user in the 'idle' status, followed by 'active' status, followed by 'idle' status, and so on. How do I do this in a single SQL query? My desired output is the following:
Currently, I successfully wrote down a query to select all rows with an identical customer_id: SELECT * FROM table WHERE customer_id IN ( SELECT customer_id FROM table GROUP BY customer_id HAVING COUNT(*) > 1 )
30 lip 2019 · How to return rows that have the same column values in MySQL? Count how many rows have the same value in MySQL? Get rows that have common value from the same table with different id in MySQL
30 lip 2019 · Use MySQL JOIN to select MySQL rows where column contains same data in more than one record. Let us first create a table − mysql> create table DemoTable ( UserId int, UserName varchar(20) ); Query OK, 0 rows affected (0.54 sec)
