I have a database with one table called "user" having two fields:
"id" (type: INTEGER, PRIMARY KEY)
"name" (type: VARCHAR(32))
I want to Write a standard SQL query which retrieves the second highest value of "id" from the "user" table. The value returned should be represented using the column name "id".
I have tried this but it gives me all ids:
SELECT `user`.`id`
FROM `user`
ORDER BY `user`.`id` ASC
LIMIT 0 , 30
some example data in my table:
id name
----------------
1 john
2 david
3 mike
I want to get '2' but now i'm getting :
id
----
1
2
3
I can do it with help of PHP but I want to know the way with mysql (SQL).
thanks
SELECT id
FROM `user`
ORDER BY id DESC -- start with highest
LIMIT 1 -- show only 1 row
OFFSET 1 ; -- but skip the first (skip 1 row)
SELECT id FROM user ORDER BY id ASC LIMIT 1, 1
select max(id) from user where id < (select max(id) from user);
select max(id) from user where id not in (Select max(id) from user);
SELECT id
FROM `user`
ORDER BY id ASC
LIMIT 1, 1
Using limit you can set an offset and the number of records you like being returned.
How 'bout
Select max(id) from user
where id <> (select max(id) from user)
This may work:
select max(id)-1 from user;
Related
so, i have this table generated annually :
+----+------+
| id | name |
+----+------+
| 1 | 20162|
| 2 | 20162|
| 3 | 20171|
| 4 | 20171|<<<||| "how do i get this bfore max value"
| 5 | 20172|
| 6 | 20172|
+----+------+
If i query :
SELECT name FROM table WHERE where name=(SELECT max(name))
The result is 20172
How do i get the value before that (20171)?
This will get second max.
SELECT *
FROM table
WHERE name NOT IN (SELECT MAX(name) FROM table )
ORDER BY id DESC LIMIT 1
You can do the little trick:
SELECT name FROM table ORDER BY name DESC LIMIT 1,1
If you want a portable solution (since the above will only work in MySQL probably):
SELECT name FROM table t1 where
1 = (SELECT count(distinct name)
from table t2
where t2.name > t1.name )
This selects the name which has exactly one other name which is greater than it. It will have issues when e.g. all values are the same but that may actually be the intention sometimes.
Also you can try this:
SELECT name
FROM (SELECT DISTINCT name FROM yourtable) TMP
ORDER BY name DESC LIMIT 1,1
how about this:
select b.second_id,b.name from
(select id, max(name) as max from tbl_max) as a
LEFT JOIN
(select id as second_id, name from tbl_max ) as b
on a.id <> second_id where name < a.max order by name desc limit 1;
Another solution much better:
set #max= 0;
select max(name) into #max from tbl_max;
select * from tbl_max where name < #max ORDER BY id desc limit 1
it return a result of
4 20171
If you want Max(name)
SELECT id,MAX(name) FROM table
WHERE name < (SELECT MAX(name) FROM table )
or
SELECT id,MAX(name) FROM table
WHERE name <> (SELECT MAX(name) FROM table )
And there is an article for Find nth high value
(as Question changed later, this tricks is not useful for this problem)
can you use this simple order by ?
SELECT * FROM tablename
group by name
order by name desc
limit 1,1
if you have multiple equal values in MAX(name) you need group by, even this query is not general solution!
You can try below code.It will give you nth highest record.
SELECT NAME FROM table ORDER BY name DESC LIMIT n,1
Hope this will helps
SELECT DISTINCT name FROM table ORDER BY name DESC LIMIT 1,1;
The LIMIT clause accepts two values, an offset and a count. When only 1 value is provided, it assumes the offset is 0
DISTINCT is necessary as you have duplicate values for name. If this was unintentional, it's not needed.
Example at http://sqlfiddle.com/#!9/ea6e2/2
I have a table
tablea
id value
__ _____
1 a
2 b
3 c
4 d
5 e
i want to fetch only latest entry in table (i.e) last value
=>id,value as 5,e
could you please tell me query for this.
use following select query
SELECT * FROM tablea where ID IN (SELECT MAX(ID) FROM tablea);
Use order by and limit:
select t.*
from t
order by id desc
limit 1;
Select id, value
from tablea
order by id desc
limit 1
lets say
My table contains
Id Status
1 0
2 1
3 0
4 0
5 1
6 0
I need output like
Id Status
5 1
I tried like Max(id) but it gives output as
id status
6 0
I can only suppose, that you want to know about the maximum id of those entries having Status=1, right? Then use
select max(id) from mytable where Status=1
Try this:
SELECT id, status
FROM myTable ORDER BY `id` DESC LIMIT 1 , 1
I have assumed that you are looking for the second highest Id record values.
I guess you would like to have the max(id) where Status=1?
Then use select max(id) from table where Status=1
Since you want to get the absolute max from both columns use :
SELECT GREATEST(MAX(id), MAX(status));
Your question is a bit unclear what it is you actually want. From your example, I guess you want the maximum ID for the max status.
This is the max id for every status:
select max(id), status from table
group by status;
This will result in 5,1 and 6,0.
You could then filter out what you don't need, e.g.
select * from (
select max(id), status from t
group by status
) maxidperstatus
where maxidperstatus.status = (select max(status) from t);
Try this also
select Id,Status
from table
where Id=(
select MAX(Id) from table where Id <> (select MAX(Id) from table)
)
I assume that you want the Id where the status is the biggest
Try this
select max(status),id from table group by id order by max(status) DESC
In mysql - table like this:
ID Name Value
1 Color Blue
1 Weight 50
1 Type Fruit
2 Color Red
2 Weight 40
3 Color Yellow
I want to get a count of distinct ID's that have a name/characteristic of 'Type' and a distinct count of ID's that don't. The first one (those that do) is easy since it's defined, but if I do a select count(distinct ID) where name <> 'type' - ID 1 will still be part of that count as it has other rows/attributes that <> 'type'.
In this example - the desired result for distinct count = 'type' would be 1 (ID 1) and for distinct count <> 'type' would be 2 (ID's 2 & 3).
Thanks in advance.
This is similar to SQL Query User has one record in the table but not another one
You can select where the id is not in a subquery looking for ids that have type
select count(id) from table where id not in (select id from table where name = 'type')
group by id
for this particular task you can use:
select count(distinct ID) from table
where ID in (select ID from table where name='type') --- this will give you count of IDs where type exists
select count(distinct ID) from table
where ID not in (select ID from table where name='type') -- this will give you count of IDs without type
SELECT id FROM test GROUP BY id HAVING
CONCAT(",",CONCAT(GROUP_CONCAT(name), ","))
NOT LIKE '%,Type,%'
will give you all ids without Type: http://sqlfiddle.com/#!2/30837/1
(Concat with , ensures, that you are not matching XType by accident.)
while
SELECT COUNT(id) AS count, GROUP_CONCAT(id) AS ids
FROM(SELECT id, count(name) as count FROM test
GROUP BY id HAVING CONCAT(",",CONCAT(GROUP_CONCAT(name), ","))
NOT LIKE '%,Type,%') as temp;
will give you the desired count: http://sqlfiddle.com/#!2/30837/9
SELECT CASE
WHEN Name='Type' THEN 'Type'
ELSE 'Non-Type'
END Name
,ID
,COUNT(ID)
FROM Stuff
GROUP BY
CASE
WHEN Name='Type' THEN 'Type'
ELSE 'Non-Type'
END
,ID
See SQLFiddle
SELECT id FROM table LIMIT 8, 3
results in 8,9,10
but I need 10,9,8
How can you do this? If you add "ORDER BY id DESC" it gets 3,2,1
Put your query in a subselect and then reverse the order in the outer select:
SELECT id from (
SELECT id FROM table ORDER BY id LIMIT 8, 3
) AS T1 ORDER BY id DESC
Test data:
CREATE TABLE table1 (id INT NOT NULL);
INSERT INTO table1 (id) VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11);
SELECT id from (
SELECT id FROM table1 ORDER BY id LIMIT 8, 3
) AS T1 ORDER BY id DESC
Result:
10
9
8
Note that the ORDER BY in the subquery is required otherwise the order is undefined. Thanks to Lasse for pointing this out!
First of all, if you're not ordering at all, that you got 8,9,10 right now might be related to the index used. Are you sure this isn't going to change in the future?
What I'm getting at is that unless you specify an order, you should not rely on it being the one you want.
So I would definitely add an order to that select to specify what you want. Otherwise you're only saying "give me 3 numbers from this table", not "give me 3 numbers from this table according to these rules". Why is 3,2,1 wrong but 8,9,10 right? You're not specifying.
Anyway, to answer your question, you must order after the limit, which means a subselect:
SELECT id FROM (
SELECT id FROM table LIMIT 8, 3
) AS dummy ORDER BY id DESC
However, I would try this SQL instead, related to the part about specifying:
SELECT id FROM (
SELECT id FROM table ORDER BY id LIMIT 8, 3
) AS dummy ORDER BY id DESC