Contents
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.
How to select only the rows with Max ( date )?
You may not care about the performance for such a small sample, but in large queries, it all adds up. SELECT t1.OrderNo, t1.PartCode, t1.Quantity FROM table AS t1 INNER JOIN (SELECT OrderNo, MAX (DateEntered) AS MaxDate FROM table GROUP BY OrderNo) AS t2 ON (t1.OrderNo = t2.OrderNo AND t1.DateEntered = t2.MaxDate)
How to select group from table with Max date?
SELECT group, date, checks FROM ( SELECT *, max_date = MAX(date) OVER (PARTITION BY group) FROM table ) AS s WHERE date = max_date ; to get the desired result. Basically, this is similar to @Twelfth’s suggestion but avoids a join and may thus be more efficient.
How to select only rows by join tables?
Here is an excellent article in the official MySQL documentation, but only standard SQL is used there, so it can be applied to whatever RDBMS you are using. Task: For each article, find the dealer or dealers with the most expensive price.
How to join table based on min and Max date?
I am trying to join them on a primary key and a datefield. I want the datefield in table A to = any 1 of 2 dates (min or the max) in table b. This would then pull the correct record based on date from table b.
When to use join and Max in a query?
The answer is to use JOIN and MAX statements in a query. To demonstrate the correct syntax, let consider: We need to display the latest student GPA records from the data that is contained in two tables: Student and StudentGrades.
Where do the Min and Max dates come from?
It sounds like that the MIN and MAX dates are coming from table b. But, then you want to use that for comparison again to table b. Are you trying to report the MIN and MAX dates of the unmatched records or on that either table b’s primary key does not exist in table a OR table a’s date is outside the expected date range from table b?