I have 2 tables named tbl_sales and tbl_rsales.
Lets assume that i have these ff value for "tbl_sales"
id | pcode | total |
2 | 12345 | 10 |
3 | 12345 | 10 |
Lets assume also that i have these ff value from "tbl_rsales"
id | sales_id | total | pcode |
1 | 1 | 20 | 55555 |
2 | 2 | 10 | 12345 |
3 | 3 | 10 | 12345 |
I can easily update data from "tbl_sales" but my problem is that when i update all value by "pcode" from tbl_sales "tbl_rsales" must be update also. but only those id's from "tbl_sales" that are in "sales_id" from tbl_rsales will update. so in other word. sales_id 1 from "tbl_rsales" will not update only sales_id 2 and 3 will be update because tbl_sales id and tbl_rsales "sales_id" is the same. it's lil complicated for me.any idea is accepted.
UPDATE sales, rsales
SET sales.pcode=rsales.pcode
WHERE sales.id=rsales.id
AND id IN(2,3)
Is this what your looking for?
UPDATE TBL_SALES , TBL_RSALES
SET //WAHTEVER YOU WANT FROM THE TABLE
WHERE TBL_SALES,PCODE = TBL_RSALES.PCODE
Related
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How can I return pivot table output in MySQL?
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Closed 5 years ago.
sorry for the weird question but I didn't know how to exactly ask this. Or if there are similar questions to look at, please let me know.
I have the following table in my database. Basically it stores the prices of an item at different stores. Every store will always have the same items, meaning if store_id 3, 4,... n values are later added, they will have the same item_ids
+----+---------+----------+---------+
| id | item_id | store_id | price |
+----+---------+----------+---------+
| 1 | 1 | 1 | 74.99|
| 2 | 2 | 1 | 25.99|
| 3 | 3 | 1 | 89.99|
| 4 | 1 | 2 | 69.99|
| 5 | 2 | 2 | 39.99|
| 6 | 3 | 2 | 95.99|
+----+---------+----------+---------+
My sql knowledge is pretty basic, but I was wondering if there is a way to get this result.
I need to add every store_id value as a column and then get the price value for the item_id at every store available and put that in a single row. Since there could be more values for store_id, every different value
+---------+-----------+-----------+
| item_id | price for | price for |
| | store_id 1| store_id 2|
+---------+-----------+-----------+
| 1 | 74.99 | 69.99|
| 2 | 25.99 | 39.99|
| 3 | 89.99 | 95.99|
+---------+-----------+-----------+
Thanks.
you could use a self join eg:
select a.item_id, a.price as price_store_1, b.price as price_store_2
from my_table a
inner join my_table b on a.item_id = b.item_1 and b.store_id = 2
where a.store_id = 1
This is my scenario
I have a permissions table with the following fields.
id | module | permission
1 | client | add
2 | client | edit
3 | client | delete
4 | someth | edit
5 | someth | delete
employee table
id | status | somestatus
1 | act | 1
2 | den | 1
3 | act | 0
4 | den | 1
5 | act | 0
6 | act | 1
Now what i would need to do is select the employee who have status="act" and somestatus=1 and give them all permissions where module="client"
so the table employee_permissions should have these rows
id | empid | permid | permvalue
1 | 1 | 1 | 1
2 | 1 | 2 | 1
3 | 1 | 3 | 1
1 | 6 | 1 | 1
2 | 6 | 2 | 1
3 | 6 | 3 | 1
This is the query I tried and I'm stuck here
INSERT INTO at2_permission_employee (employee_id,permission_id)
SELECT at2_employee.employee_id as employee_id
, (SELECT at2_permission.permission_id as permission_id
FROM at2_permission
where at2_permission.permission_module='client'
)
from at2_employee
where at2_employee.employee_status='Active'
and at2_employee.employees_served_admin = 1;
I get the error sub query returns multiple rows which makes sense to me. But I'm not sure how to modify the query to account for iterating over the rows returned by sub query
If I'm not wrong, like this:
INSERT INTO at2_permission_employee (employee_id, permission_id, permvalue)
SELECT
at2_employee.employee_id,
at2_permission.permission_id,
1
FROM at2_permission cross join at2_employee
WHERE
at2_employee.employee_status='Active'
and at2_employee.employees_served_admin = 1
and at2_permission.permission_module='client';
It's a bit unclear where the value for permvalue should come from so I hard coded it and used the permission.id for both id and permid, but this query should give you an idea on how to accomplish what you want:
insert employee_permissions (id, empid, permid, permvalue)
select p.id, e.id, p.id, 1
from employee e, permissions p
where p.module = 'client' and e.status = 'act' and e.somestatus = 1;
I have a table like the below one
id | id_fk | data |
-------------------------
1 | 2 | data1 |
2 | 2 | data2 |
3 | 1 | data3 |
4 | 3 | data4 |
5 | 1 | data5 |
-------------------------
here I have the table id as 'id', foreign key from another table as id_fk.
What I try to achieve is, to get the count of each foreign key in an increment mode. that is, if the id_fk -> 2 occur on the first time, then the count should be 1, at the next occurance count become 2, and so on for all the id_fk. I tried many ways. But none give me the actual output.
From the above table, the result table will look like:
id_fk | count |
------------------
1 | 1 |
1 | 2 |
2 | 1 |
2 | 2 |
3 | 1 |
------------------
Please help me to solve this.. any help will be appreciated.
Try this
SELECT `id_fk`,
#a:=IF(id_fk=#b,#a+1,1) serial_number,
#b:=id_fk
FROM your_table,(SELECT #a:= 0,#b:=0) AS a
ORDER BY `id_fk` ASC
It works perfect with join.
select t1.id_fk,t1.id,count(*)
from your_table t1
left join your_table t2
on t1.id_fk=t2.id_fk and t1.id>=t2.id
group by t1.id_fk,t1.id
See Sql Fiddle Demo
I have a MySQL table called employee that looks like this:
ID | User | Phone_No | Phone_No_Count
1 | Fred | 9999 | 1
2 | John | 8888 | 2
3 | Pablo | 123 | 1
4 | John | | 0
5 | John | 8888 | 2
6 | Pablo | | 0
7 | John | 456 | 1
Phone_No_Count is a count of the Phone_No column, if there is no Phone_No then Phone_No_Count is set to zero.
I want to backfill the missing Phone_No entries using Phone_No entries which have the highest Phone_No_Count.
e.g. User John has 2 Phone_No's (8888 and 456) so I just want to use 8888 as it has the highest Phone_No_Count (2)
The backfilled data in employee would then look like this:
ID | User | Phone_No | Phone_No_Count
1 | Fred | 9999 | 1
2 | John | 8888 | 2
3 | Pablo | 123 | 1
4 | John | 8888 | 0
5 | John | 8888 | 2
6 | Pablo | 123 | 0
7 | John | 456 | 1
I can then update the Phone_No_Count separately, which I know how to do anyway.
All the examples I've seen online are for backfilling multiple tables or if it's just one table they don't have the required logic for this.
Can somebody please help as this has been frying my brain all day!!
One way to go about this kind of update you can use user defined variables in your query and store the phone for the user which has the maximum of phone count (i.e a correlated subquery) then join this data with your table and do update
update Table1 t1a
inner join(
select t1.id,
t1.`User`,
#p:= case
when t1.Phone_No is null then #c
else t1.Phone_No END Phone_No,
#c:=(select Phone_No from Table1 where t1.`User`=`User` order by `Phone_No_Count` DESC limit 1 ) max_phone
from Table1 t1,(select #p:=0,#c:=0) t
order by t1.`User`,t1.`Phone_No_Count` DESC
) t2 on(t1a.id=t2.id)
set t1a.Phone_No = t2.Phone_No
Fiddle Demo
The trick is to get the phone number for the highest count. Unfortunately, MySQL doesn't let you have subqueries on the same query being updated, but you can do this with a trick. This allows you to use update/join syntax:
update employee e join
(select e.user,
substring_index(group_concat(phone_no order by phone_no_count desc
), ',', 1) as new_phone_no
from employee e
group by e.user
) toupdate
on e.user = toupdate.user
set e.phone_no = toupdate.new_phone_no
where e.phone_no is null;
I have a table INVENTORY which consists of inventory items. I have the following table structure:
INSTALLATION_ID
COMPONENT_ID
HISTORY_ID
ON_STOCK
LAST_CHANGE
I need to obtain the row with the max HISTORY ID for records for which the spcified LAST_CHANGE month doesn't exist.
Each COMPONENT_ID and INSTALLATION_ID can occur multiple times, they are distinguished by their respective HISTORY_ID
Example:
I have the following records
COMPONENT_ID | INSTALLATION_ID | HISTORY_ID | LAST_CHANGE
1 | 100 | 1 | 2013-01-02
1 | 100 | 2 | 2013-02-01
1 | 100 | 3 | 2013-04-09
2 | 100 | 1 | 2013-02-22
2 | 100 | 2 | 2013-03-12
2 | 100 | 3 | 2013-07-07
2 | 100 | 4 | 2013-08-11
2 | 100 | 5 | 2013-09-15
2 | 100 | 6 | 2013-09-29
3 | 100 | 1 | 2013-02-14
3 | 100 | 2 | 2013-09-23
4 | 100 | 1 | 2013-04-17
I am now trying to retrieve the rows with the max HISTORY ID for each component but ONLY for COMPONENT_IDs in which the specifiec month does not exists
I have tried the following:
SELECT
INVENTORY.COMPONENT_ID,
INVENTORY.HISTORY_ID
FROM INVENTORY
WHERE INVENTORY.HISTORY_ID = (SELECT
MAX(t2.HISTORY_ID)
FROM INVENTORY t2
WHERE NOT EXISTS
(
SELECT *
FROM INVENTORY t3
WHERE MONTH(t3.LAST_CHANGE) = 9
AND YEAR(t3.LAST_CHANGE)= 2013
AND t3.HISTORY_ID = t2.HISTORY_ID
)
)
AND INVENTORY.INSTALLATION_ID = 200
AND YEAR(INVENTORY.LAST_CHANGE) = 2013
The query seems to have correct syntax but it times out.
In this particular case, i would like to retrieve the maximum HISTORY_ID for all components except for those that have records in September.
Because I need to completely exclude rows by their month, i cannot use NOT IN, since they will just suppress the records for september but the same component could show up with another month.
Could anybody give some pointers? Thanks a lot.
If I understand correctly what you want you can do it like this
SELECT component_id, MAX(history_id) history_id
FROM inventory
WHERE last_change BETWEEN '2013-01-01' AND '2013-12-31'
AND installation_id = 100
GROUP BY component_id
HAVING MAX(MONTH(last_change) = 9) = 0
Output:
| COMPONENT_ID | HISTORY_ID |
|--------------|------------|
| 1 | 3 |
| 4 | 1 |
If you always filter by installation_id and a year of last_change make sure that you have a compound index on (installation_id, last_change)
ALTER TABLE inventory ADD INDEX (installation_id, last_change);
Here is SQLFiddle demo