How to use Max within inner join-SQL Stack Overflow?

How to use Max within inner join-SQL Stack Overflow?

So, to get the entire row, you want to join the original table with those results: SELECT fpm.* FROM facebook_post_metrics fpm JOIN ( SELECT fbid, MAX (date_executed) AS latestDate FROM facebook_post_metrics GROUP BY fbid) t ON t.fbid = fpm.fbid AND t.latestDate = fpm.date_executed;

How to get max value from rows and joining?

This is what my query looks like, but it gives me multiple rows of results (instead of max) when i do the join Sub-query works fine, I get the problem on doing th join. How do I fix this?

What to do with Max ID in MySQL?

AND pd_id = (select max (pd_id) from product) GROUP BY pd_title This query is not optimal but it would do the job. Aaahhh, the good old greatest-n-per-group Of course, you should adapt this to your needs accordingly.

How to use join with Max in Excel?

Not all students may have grade records and mostly of them may have multiple entries. Sixteen student grade records will be returned by using only a LEFT OUTER JOIN in the query. Altering the query to include a subquery with MAX on record id, results with student latest GPA data.

Why is MySQL inner join too slow in SQL?

Unfortunately, in this case, MySQL optimizer is not smart enough to stop searching for the row as soon as a match is found (because you are using Group By, and no aggregation function is being used).

Which is the slowest query in MySQL?

I have three tables：product (10k records), product_attribute (4k records), and product_value (2m records). product and product_attribute are connected via product_value. I want to retrieve a specific product (e.g., product_id = 001) and its respective attribute name and attribute value. At first, I try But it is extremely slow.

Which is column to use for inner join?

So the common column that would be used for the inner join is id from the facebook_posts table and FBID from the facebook_post_metrics. name number FBID Date_Executed User_Executed a 1 1 2012-09-18 16:10:44.917 admin b 2 1 2012-09-25 11:39:01.000 jeff c 3 4 2012-09-25 13:20:09.930 steve d 4 4 2012-09-25 13:05:09.953 marsha

What to do when column does not exist in select?

This makes me use the max () aggregate function and apply the result to a JOIN function on the same table as PostgreSQL does not authorize to use the columns in the SELECT clause if they do not appears in the GROUP BY clause, ALTHOUGH using a max () mean obviously I’m interested to the row containing the max values!

Is there a not exist version of SQL Server join?

As jarlh pointed out in the comments, not in might lead to surprising results when there are nulls in the subquery. So, here is the not exists version: It doesn’t require any join. Thanks for contributing an answer to Stack Overflow!

When to use inner join or left join in SQL?

The inner join clause eliminates the rows that do not match with a row of the other table. The left join, however, returns all rows from the left table whether or not there is a matching row in the right table. Suppose we have two tables A and B. The table A has four rows 1, 2, 3 and 4. The table B also has four rows 3, 4, 5, 6.

How to make left join with row having Max date?

SELECT p.id, b.amount FROM Person p LEFT JOIN (select * from Bill where date = (SELECT MAX (date) FROM Bill b1 WHERE person_id = 1)) b ON b.person_id = p.id WHERE p.id = 1; What you are looking for is a way to tell in bills, for each person, what is the latest record, and that one is the one to join with.