I have a table (“lms_attendance”) of users’ check-in and out times that looks like this: I’m trying to create a view of this table that would output only the most recent record per user id, while giving me the “in” or “out” value, so something like: I’m pretty close so far, but I realized that views won’t accept subquerys, which
Tag: greatest-n-per-group
SQL query to find the highest paid salary for each lanauges
As I am not expert in writing the SQL queries so want for help. I have a table called programmer whose structure & data look like: In prof1 data are: PASCAL,CLIPPER,COBOL,CPP,COBOL,PASCAL,ASSEMBLY,PASCAL,BASIC,C,PASCAL,FOXPRO. In prof2 data are: BASIC,COBOL,DBASE,DBASE,ORACLE,DBASE,CLIPPER,C,DBASE,COBOL,ASSEMBLY,BASIC,C. In salary data are: 3200,2800,3000,2900,4500,2500,2800,3000,3200,2500,3600,3700,3500. I need a query to display the names of highest paid programmer for each language, which means I need
Select EMP with max SAL from each DEPT
I´m having a bad time with a SQL query. I´m using oracle default tables: ‘EMP’ TABLE http://imageshack.us/photo/my-images/850/sinttuloxps.png/ AND ‘DEPT’ TABLE http://imageshack.us/photo/my-images/19/assayp.png/ I wan´t to get the employee with the highest salary in each department. I´m using SQLPLUS. Thanks in advance! ALSO CODE: Answer Classic greatest-n-per-group query. Here is what you want: Here is a working fiddle: http://sqlfiddle.com/#!4/7147b/6 Additionally, you might
MYSQL How do I Select all emails from a table but limit number of emails with the same domain
As the topic sugests I want to select all emails in the list. But limit the number of emails with the same domain. Lets say i have 500 gmail adressses. And 2 example.com adresses. .. and so on.. …
Join two tables where table A has a date value and needs to find the next date in B below the date in A
I got this table “A”: and this table “B”: Now I am looking for a way to JOIN those two tables having the “value” column in “B” mapped to the dates in “A”. The tricky part for me here is that table “B” only stores the change date and the new value. Now when I need this value in table
how to sort order of LEFT JOIN in SQL query?
OK I tried googling for an answer like crazy, but I couldn’t resolve this, so I hope someone will be able to help. Let’s say I have a table of users, very simple table: and I have another table of their cars and their prices. Now what I need to do is something like this (feel free to rewrite): Which
COUNT results from SQL Query with a HAVING clause
Are you able to use COUNT in a query with a HAVING clause so that the COUNT returns the number of rows? When I try, Im getting the count of the number of times the ID shows up in the table. Here is …
How to make a SQL query for last transaction of every account?
Say I have a table “transactions” that has columns “acct_id” “trans_date” and “trans_type” and I want to filter this table so that I have just the last transaction for each account. Clearly I could …
How can I SELECT rows with MAX(Column value), PARTITION by another column in MYSQL?
I have a table of player performance: What query will return the rows for each distinct home holding its maximum value of datetime? In other words, how can I filter by the maximum datetime (grouped by home) and still include other non-grouped, non-aggregate columns (such as player) in the result? For this sample data: the result should be: id home