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CrimeData Table for 12 months
Crime Took place in Easternmost
I need to find the following:
Q.7 What type of Crime takes place in the …
(a) Easternmost ………………..
(b) Westernmost ………………..
(c) Northernmost………………..
(d) Southernmost………………..
I tried to find the crime took place in the Easternmost using the following SQL code
SELECT Max(CrimeData.Easting) AS MaxOfEasting, CrimeData.Type
FROM CrimeData
GROUP BY CrimeData.Type;
but I got more than one crime and also other Easting numbers. Can you please tell me if there are other good ways to find the solution.
Please see the attached pictures :)
Rather than using Max/Min, have a look at the TOP keyword in SQL. Some SQL might look like:
SELECT TOP 1 CD.*
FROM CrimeData CD
ORDER BY CD.Easting DESC;
Regards,
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How can I find data that dont end with letter 'g' without using NOT LIKE function, please help
select * from table where right(column, 1) != 'g'
Since you asked how to do it using "not like," I'll answer that. The function version provided by #Zoories would be more efficient.
This works at w3schools.com
SELECT * FROM Customers where CustomerName not like '%g';
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I have a query that fetches over a million of records. With regular select, I dont see any issue and its taking under 1 sec to returns the records.
My requirement is to get top 10 rows after applying order by clause. Its taking around 1 minute to do even after having necessary indexes on tables involved.
Could someone recommend a solution to get top 10 rows after applying sorting?
Have you tried :
Select * from (
/*Your query goes here
With order by part*/)
where rownum <=10;
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can someone please check if this is correct?
Not sure if my answer to Q6 is correct, I am not sure if the group_by I am using is right or not, the rest I think is ok
Thanks
You are close. You need to:
Use COUNT() instead of SUM().
There's no need to use the HAVING clause.
Optionally, you can add aliases to the columns, so they become easier to read.
Your query should look like:
select a.author_id, count(*) as titles, sum(b.quantity_ordered) as units
from a join b on a.book_id = b.book_id
group by a.author_id
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I have a table like.
And i want to answer like a table below:-
I think you want to use aggregation, like this:
select empcode, coode, finyear, wef,
max(cl_opn_bal) as cl_open_bal,
. . .
from table t
group by empcode, coode, finyear, wef;
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Goal:
"In which years was the Physics prize awarded but no Chemistry prize. (WARNING - this question is way too hard for this level, you will need to use sub queries or joins). "
Problem:
Don't know how to solve it.
The code can be found in "http://sqlzoo.net/1b.htm", headline 3a.
SELECT
distinct yr
FROM
nobel
WHERE
yr not in (select yr from nobel where subject in ('Chemistry')) AND
subject in ('Physics')
One option using subqueries. The subquery gets all the years where there was a chemistry prize which is used to to excude those years with the not in statement.
The distinct yr accounts for the fact that there could have been two prizes awarded.
There's a bunch of different ways to make this work. Take the code above and try making a join with the subquery work. That'll give you more practice with subqueries and using them in joins which is a useful thing.