How to select the latest record in each group?

How to select the latest record in each group?

In this situation, we can choose to run an SQL statement that will return the latest record in each group. For the purpose of this post, assume that we have deployed multiple Raspberry Pis to capture temperature and humidity in different locations.

When was the last time a record was added / modified in a SQL table?

The table does **not** have any column that keeps track of LastUpdated or something like that. Is it possible to find out when was the last date/time that someone added/changed a record? Which record was that? Thanks. You have to search your table first from the sys.objects and grab that object id before using the usage_stats table.

How to find records with the most recent date?

If you want to return the records with the most recent or latest dates in a field, and you do not know the exact date values, or they don’t matter, you create a top values query. If you want to return all the records where the date matches, is prior to, or later than a specific date, you use a filter.

Where do I find the number of records I have?

On the Design tab, in the Query Setup group, click the down arrow next to All (the Top Values list), and either enter the number of records that you want to see, or select an option from the list. Click Run to run the query and display the results in Datasheet view.

How to query SQL for a latest record date?

Select * from table1 where lastest_date= (select Max (latest_date) from table1 where user=yourUserName) Inner Query will return the latest date for the current user, Outer query will pull all the data according to the inner query result.

How to get the latest record in Oracle?

It might not work so well on large tables, even with good indexing. For Oracle sorts the result set in descending order and takes the first record, so you will get the latest record: Select * from table1 where lastest_date= (select Max (latest_date) from table1 where user=yourUserName)

How to select records with most recent date time?

Note that MyDate format will be YYMMDD and MyTime is in 24 hour format. I want to return the result of unique MyKey with most recent MyDate and MyTime. The expected result will be something like:

How to select the latest record in table?

The sub-query will actually be extracting the maximum date_sent field from the current record, in other words, as the outer query traverses the table one record at a time the two date_sent fields in the sub-query ” date_sent= (select max (date_sent) ” will always be the same.

How to select the latest record in MySQL?

First find the newest dates for each thread_id. Then select records that have these dates and matching thread_id s SELECT t.id, t.thread_id, t.user_id, t.body, t.date_sent FROM messages AS t CROSS JOIN ( SELECT thread_id, MAX (date_sent) AS date_sent FROM messages WHERE user_id = 1 GROUP BY thread_id ) AS sq USING (thread_id, date_sent)

How to select the latest record on Raspberry Pi?

In addition to capturing data, there is also another endpoint returns the most recent temperature and humidity reading captured by each of the Raspberry Pi. Given that, we choose to run an SQL statement that will return the latest record in each group; with the device ID serving as the group number.