I have two columns in a table say, LIKE and FAVORITES (int value)
See the chart:
╔════╦══════╦══════════╗
║ ID ║ LIKE ║ FAVORITE ║
╠════╬══════╬══════════╣
║ 1 ║ 25 ║ 9 ║
║ 2 ║ 5 ║ 17 ║
║ 3 ║ 6 ║ 1 ║
║ 4 ║ 45 ║ 0 ║
║ 5 ║ 3 ║ 44 ║
╚════╩══════╩══════════╝
Now, I want to select the Maximum Like and Favorites IDs from the SELECT clause.
I have tried
SELECT ID from TABLE WHERE CONDITION ORDER BY LIKE,FAVORITES DESC
But the result shows the rows based on LIKE DESC order.
The result should be
╔════╗
║ ID ║
╠════╣
║ 5 ║
║ 4 ║
║ 1 ║
║ 2 ║
║ 3 ║
╚════╝
I think you need to add those two columns. eg,
SELECT ID
FROM tableName
ORDER BY `LIKE` + FAVORITE DESC
SQLFiddle Demo
Result:
╔════╗
║ ID ║
╠════╣
║ 5 ║
║ 4 ║
║ 1 ║
║ 2 ║
║ 3 ║
╚════╝
Related
I am learning sql query.
Here is my table simplified
╔════╦══════════════╦══════════════╦════════╦
║ id ║ user_id ║ department_id║ salary ║
╠════╬══════════════╬══════════════╬════════╬
║ 1 ║ 1 ║ 3 ║ 100 ║
║ 2 ║ 2 ║ 3 ║ 50 ║
║ 3 ║ 1 ║ 3 ║ 30 ║
║ 4 ║ 2 ║ 3 ║ 20 ║
║ 5 ║ 2 ║ 3 ║ 20 ║
╚════╩══════════════╩══════════════╩════════╩
Here is what I want to have below
╦══════════════╦══════════════╦════════╦
║ user_id ║ department_id║ salary ║
╠══════════════╬══════════════╬════════╬
║ 1 ║ 3 ║ 130 ║
║ 2 ║ 3 ║ 90 ║
╚══════════════╩══════════════╩════════╩
I want to add user salary if they are in the same department.
I have nooo ideas how to start.
Does anyone have good feedback that I can start with?
Thank you in advance
Try this query:
Select user_id, department_id, sum(salary) from table
Group by user_id, department_id
In the select clause, you have the columns you wish to select and your group by clause contains the grouping.
I have two tables named deals and mp_details. Columns deal_id and mp_details_id are the two primary keys. There is a relation between the two tables using the deal_mp_id column where it works as a foreign key. I want to fetch all the minimum records of column name deal_selling_price with group by mp_details_id. Here are the tables:
deals
╔═════════╦════════════╦════════════════════╗
║ deal_id ║ deal_mp_id ║ deal_selling_price ║
╠═════════╬════════════╬════════════════════╣
║ 3 ║ 1 ║ 425 ║
║ 4 ║ 1 ║ 540 ║
║ 5 ║ 2 ║ 340 ║
║ 6 ║ 2 ║ 315 ║
║ 7 ║ 3 ║ 425 ║
║ 8 ║ 3 ║ 720 ║
║ 9 ║ 4 ║ 382.5 ║
║ 10 ║ 4 ║ 495 ║
║ 11 ║ 5 ║ 595 ║
║ 12 ║ 5 ║ 720 ║
╚═════════╩════════════╩════════════════════╝
mp_details
╔═══════════════╦═════════════════════╗
║ mp_details_id ║ mp_details_name ║
╠═══════════════╬═════════════════════╣
║ 1 ║ Olive Bar & Kitchen ║
║ 2 ║ Thai High ║
║ 3 ║ Tonino ║
║ 4 ║ Impromptu ║
║ 5 ║ Zerruco ║
╚═══════════════╩═════════════════════╝
And I want this kind of result:
╔═════════╦════════════╦════════════════════╗
║ deal_id ║ deal_mp_id ║ deal_selling_price ║
╠═════════╬════════════╬════════════════════╣
║ 3 ║ 1 ║ 425 ║
║ 6 ║ 2 ║ 315 ║
║ 7 ║ 3 ║ 425 ║
║ 9 ║ 4 ║ 382.5 ║
║ 11 ║ 5 ║ 595 ║
╚═════════╩════════════╩════════════════════╝
The following query will give you the result set from your screen capture above:
SELECT d1.deal_id, d1.deal_mp_id, d2.minPrice
FROM deals d1
INNER JOIN
(
SELECT deal_mp_id, MIN(deal_selling_price) AS minPrice
FROM deals
GROUP BY deal_mp_id
) d2
ON d1.deal_mp_id = d2.deal_mp_id AND d1.deal_selling_price = d2.minPrice
If you also want to include information from the mp_details table, you can do an additional join like this:
SELECT d1.deal_id, d1.deal_mp_id, d2.minPrice, mp.mp_details_name
FROM deals d1
INNER JOIN
(
SELECT deal_mp_id, MIN(deal_selling_price) AS minPrice
FROM deals
GROUP BY deal_mp_id
) d2
ON d1.deal_mp_id = d2.deal_mp_id AND d1.deal_selling_price = d2.minPrice
INNER JOIN mp_details mp
ON d1.deal_mp_id = mp.mp_details_id
Follow the link below for a running demo:
SQLFiddle
Try below query
select
D.Deal_id, MD.mp_details_id, MIN(D.deal_selling_price)
FROM
deals D inner join mp_details MD
ON
D.Deal_id = MD.mp_details_id
GROUP BY
D.Deal_id, MD.mp_details_id
Use this query:
SELECT d.deal_id, d.deal_mp_id, d.deal_selling_price
FROM deals d
JOIN
(
SELECT deal_mp_id, MIN(deal_selling_price) AS min_selling_price
FROM deals
GROUP BY deal_mp_id
) m
ON d.deal_mp_id = m.deal_mp_id AND d.deal_selling_price = m.min_selling_price
I have two tables I want to join but I am unable to get the desired answer.
I am trying to joing two table on the base of two primary key and grouping thrid column and want to get count of third column.
Table 1:
╔══════╦══════╗
║ D_ID ║ E_ID ║
╠══════╬══════╣
║ 5 ║ 25 ║
║ 5 ║ 26 ║
║ 5 ║ 27 ║
║ 10 ║ 30 ║
║ 10 ║ 31 ║
║ 10 ║ 32 ║
╚══════╩══════╝
Table 2:
╔══════╦══════╦══════╗
║ D_ID ║ E_ID ║ L_ID ║
╠══════╬══════╬══════╣
║ 5 ║ 25 ║ 1 ║
║ 5 ║ 25 ║ 2 ║
║ 5 ║ 25 ║ 3 ║
║ 5 ║ 25 ║ 4 ║
║ 5 ║ 26 ║ 5 ║
║ 5 ║ 26 ║ 6 ║
║ 5 ║ 26 ║ 7 ║
║ 5 ║ 26 ║ 8 ║
║ 5 ║ 27 ║ 9 ║
║ 10 ║ 30 ║ 10 ║
║ 10 ║ 30 ║ 11 ║
║ 10 ║ 31 ║ 12 ║
║ 10 ║ 31 ║ 13 ║
║ 10 ║ 32 ║ 14 ║
╚══════╩══════╩══════╝
Desired Output:
╔══════╦══════╦═════════════╗
║ D_ID ║ E_ID ║ Count(L_ID) ║
╠══════╬══════╬═════════════╣
║ 5 ║ 25 ║ 4 ║
║ 5 ║ 26 ║ 4 ║
║ 5 ║ 27 ║ 1 ║
║ 10 ║ 30 ║ 2 ║
║ 10 ║ 31 ║ 2 ║
║ 10 ║ 32 ║ 1 ║
╚══════╩══════╩═════════════╝
Using this Query:
select a.D_ID, a.E_ID, count(b.L_ID)
from table1 a, table2 b
where a.D_ID = b.D_ID and
a.E_ID = b.E_ID
group by a.D_ID, a.E_ID
Join is important because table 2 is huge table with millions of records and table 1 has only few thousand records that what I need. I dont need all D_ID and E_ID's. I only need those D_ID and E_ID which are in Table1.
just add a DISTINCT clause to the count like so
SELECT
a.D_ID, a.E_ID, COUNT(DISTINCT b.L_ID)
FROM table1 a, table2 b
WHERE a.D_ID = b.D_ID
AND a.E_ID = b.E_ID
GROUP BY a.D_ID, a.E_ID
my personal preference for joining tables is like so
SELECT a.d_id, a.e_id, COUNT(DISTINCT b.l_id)
FROM table1 a
JOIN table2 b ON a.D_ID = b.D_ID
AND a.E_ID = b.E_ID
GROUP BY a.D_ID, a.E_ID
see this DEMO executing all two queries with the correct result set
I have three tables named "users","user_hobbies" and "hobbies". Below is the sample tables with values;Below is the users table with fields id, name and age
╔════╦══════╦═════╗
║ ID ║ NAME ║ AGE ║
╠════╬══════╬═════╣
║ 1 ║ abc ║ 23 ║
║ 2 ║ xyz ║ 24 ║
║ 3 ║ pqr ║ 21 ║
╚════╩══════╩═════╝
and below is user_hobbies table with fields id, user_id and hobby_id
╔════╦═════════╦══════════╗
║ ID ║ USER_ID ║ HOBBY_ID ║
╠════╬═════════╬══════════╣
║ 1 ║ 1 ║ 1 ║
║ 2 ║ 1 ║ 2 ║
║ 3 ║ 1 ║ 3 ║
║ 4 ║ 2 ║ 4 ║
║ 5 ║ 2 ║ 3 ║
║ 6 ║ 2 ║ 5 ║
║ 7 ║ 3 ║ 2 ║
║ 8 ║ 4 ║ 6 ║
╚════╩═════════╩══════════╝
. Below is the hobbies table with fields id and desc
╔════╦═══════════╗
║ ID ║ DESC ║
╠════╬═══════════╣
║ 1 ║ music ║
║ 2 ║ chatting ║
║ 3 ║ cricket ║
║ 4 ║ badminton ║
║ 5 ║ chess ║
║ 6 ║ cooking ║
╚════╩═══════════╝
. The actual requirement is that i need a query to retrieve name, age, hobby_id and desc (see an example below)
╔══════╦═════╦══════════╦═════════════════════════╗
║ NAME ║ AGE ║ HOBBYID ║ DESC ║
╠══════╬═════╬══════════╬═════════════════════════╣
║ abc ║ 23 ║ 1,2,3 ║ music,chatting,cricket ║
║ pqr ║ 21 ║ 2 ║ chatting ║
║ xyz ║ 24 ║ 4,3,5 ║ badminton,cricket,chess ║
╚══════╩═════╩══════════╩═════════════════════════╝
You need to join the tables first and use an aggregate function called GROUP_CONCAT().
SELECT a.Name,
a.Age,
GROUP_CONCAT(c.ID) hobbyIDs,
GROUP_CONCAT(c.desc) descList
FROM users a
INNER JOIN user_hobbies b
ON a.ID = b.user_ID
INNER JOIN hobbies c
ON b.hobby_ID = c.ID
GROUP BY a.Name, a.Age
SQLFiddle Demo
MySQL GROUP_CONCAT()
To further gain more knowledge about joins, kindly visit the link below:
Visual Representation of SQL Joins
OUTPUT
╔══════╦═════╦══════════╦═════════════════════════╗
║ NAME ║ AGE ║ HOBBYIDS ║ DESCLIST ║
╠══════╬═════╬══════════╬═════════════════════════╣
║ abc ║ 23 ║ 1,2,3 ║ music,chatting,cricket ║
║ pqr ║ 21 ║ 2 ║ chatting ║
║ xyz ║ 24 ║ 4,3,5 ║ badminton,cricket,chess ║
╚══════╩═════╩══════════╩═════════════════════════╝
I have two table
The table structure goes something like this
Table A
╔══════╦════════╗
║ P_ID ║ P_NAME ║
╠══════╬════════╣
║ 1 ║ name1 ║
║ 2 ║ name2 ║
║ 3 ║ name3 ║
║ 4 ║ name5 ║
╚══════╩════════╝
Table B
╔═════╦════════╦════════╦═══════════╦═══════╗
║ ID ║ P_ID ║ C_ID ║ C_PRICE ║ TIME ║
╠═════╬════════╬════════╬═══════════╬═══════╣
║ 1 ║ 1 ║ 3 ║ 11 ║ 11111 ║
║ 2 ║ 2 ║ 4 ║ 22 ║ 22222 ║
║ 3 ║ 3 ║ 5 ║ 33 ║ 33333 ║
║ 4 ║ 3 ║ 6 ║ 44 ║ 44444 ║
║ 5 ║ 3 ║ 6 ║ 55 ║ 55555 ║
║ 6 ║ 4 ║ 7 ║ 66 ║ 66666 ║
╚═════╩════════╩════════╩═══════════╩═══════╝
The requirement is
1. Join two table
2. Group By C_ID
3. The latest rows in Group By
I tried to modify the answer By Bill Karwin from How do I join the most recent row in one table to another table?
SELECT e.*, s1.*
FROM table_a e
INNER JOIN
table_b s1
ON (e.p_id = s1.p_id)
LEFT OUTER JOIN table_b s2
ON (e.p_id = s2.p_id AND s1.id < s2.id)
WHERE s2.p_id IS NULL;
but I could not achieve what I want. From his answer I will get
╔═════╦════════╦════════╦═══════════╦═══════╦═════════╗
║ ID ║ P_ID ║ C_ID ║ C_PRICE ║ TIME ║ P_NAME ║
╠═════╬════════╬════════╬═══════════╬═══════╬═════════╣
║ 1 ║ 1 ║ 3 ║ 11 ║ 11111 ║ name1 ║
║ 2 ║ 2 ║ 4 ║ 22 ║ 22222 ║ name2 ║
║ 5 ║ 3 ║ 6 ║ 55 ║ 55555 ║ name3 ║
║ 6 ║ 4 ║ 7 ║ 66 ║ 66666 ║ name5 ║
╚═════╩════════╩════════╩═══════════╩═══════╩═════════╝
But the output what I want is as below ( dublicate P_ID is ok but for each dublicate P_ID should not have dublicate C_ID )
╔═════╦════════╦════════╦═══════════╦═══════╦═════════╗
║ ID ║ P_ID ║ C_ID ║ C_PRICE ║ TIME ║ P_NAME ║
╠═════╬════════╬════════╬═══════════╬═══════╬═════════╣
║ 1 ║ 1 ║ 3 ║ 11 ║ 11111 ║ name1 ║
║ 2 ║ 2 ║ 4 ║ 22 ║ 22222 ║ name2 ║
║ 3 ║ 3 ║ 5 ║ 33 ║ 33333 ║ name3 ║
║ 5 ║ 3 ║ 6 ║ 55 ║ 55555 ║ name3 ║
║ 6 ║ 4 ║ 7 ║ 66 ║ 66666 ║ name5 ║
╚═════╩════════╩════════╩═══════════╩═══════╩═════════╝
SELECT e.*, s1.*
FROM table_a e INNER JOIN
(SELECT * FROM (SELECT * FROM table_b ORDER BY time DESC) temp GROUP BY c_id) s1;
The innermost ORDER BY ensures the for the same c_id the desired row always comes first, the outter GROUP BY will group on c_id, and having not specified otherwise will return the first row found for each group.
You must
Join two table
Group By C_ID
Number row for each group desc ordered by chosen field (last imply order!)
Filter by row number = 1.
This can help you for numbering rows.