I am working in a MySQL database.
I have three tables. 1 , 2 & 3
I would like to join the result of joining tables 2 & 3 to table 1 on an id. I would like to keep all entries for table 1 and after join the result of 2 & 3 on the call id and where it doesn't match have a null value.
Table 1 has callid
Table 2 has callid and invoiceid
Table 3 has invoiceid and customerid
So join table 2 & 3 on invoiceid and filter by customerid = xyz the result of that is then joined to table 1 on callid. Table 1 would also have a Where clause filtering the on a date
result would look like this
callid customerid
123 xyz
124 xyz
125 null
126 xyz
thanking you in advance
I think you are describing left join:
select . . .
from table1 t1 left join
table2 t2
on t1.callid = t2.callid left join
table3 t3
on t3.invoiceid = t2.invoiceid;
You can filter on customer id in the on clause:
from table1 t1 left join
table2 t2
on t1.callid = t2.callid left join
table3 t3
on t3.invoiceid = t2.invoiceid and t3.customerid = ?;
However, this might not be exactly what you want. You might want to filter for the inner join and then do the left join:
select . . .
from table1 t1 left join
(table2 t2 join
table3 t3
on t3.invoiceid = t2.invoiceid
)
on t1.callid = t2.callid and
t3.customerid = ?
Related
Thanks for assisting with the previous query (SQL Query that selects a column in table 1 and uses that to select sum in table 2) of SUM from 2 tables, I now have a additional Condition for 1 of the tables. I would like to add WHERE Group1 = 1 AND IN/OUT = 'OUT'
I have 3 tables,
Names ,Groups
Names ,Payments
Names ,Payments and IN/OUT
I want to only SUM the OUT Payments in Table 3, I am getting total payments only So FAR is have:
SELECT t1.name1, SUM(t2.sale2),SUM(t3.sale3)
FROM table1 t1 JOIN table2 t2 ON t1.name1 = t2.name2
JOIN table3 t3 ON t1.name1 = t3.name3
WHERE group1 = 1
GROUP BY t1.name1
i would also like to add a zero if there is no data to sum instead of removing the whole record, Currently if a name has no payments in Table 3 but has payments in table 2 it deletes the record.
Please check the query below =>
To Get OutPayment group by Name
SELECT t1.Names,SUM(t3.Payments) As OutPayment
FROM TABLE3 as t3
INNER JOIN TABLE1 as t1 ON t1.Names = t3.Names
INNER JOIN TABLE2 as t2 ON t1.Names = t2.Names
WHERE t1.GroupID = 1 AND t3.INOROUT=2 --INOROUT =2 is OUT and 1 is IN
GROUP BY t1.Names;
To Get TotalOutPayment
SELECT SUM(t3.Payments) As TotalOutPayment
FROM TABLE3 as t3
INNER JOIN TABLE1 as t1 ON t1.Names = t3.Names
INNER JOIN TABLE2 as t2 ON t1.Names = t2.Names
WHERE t1.GroupID = 1 AND t3.INOROUT=2; --INOROUT =2 is OUT and 1 is IN
Note: Code is in DBFiddle too Check the Demo Query Link
How can I check how many products added by a,b,c,d respectively by using a query?
table1
admin_id admin_name
3 a
4 b
5 c
6 d
table2
admin_id products
3 pDeal
3 pSeal
4 pAeal
5 pZeal
6 pXeal
3 pHeal
6 pPeal
You need a simple JOIN and a COUNT query:
SELECT table1.admin_name, COUNT(*) as cnt
FROM
table1 INNER JOIN table2
ON table1.admin_id = table2.admin_id
GROUP BY
table1.admin_name
Try this...
SELECT a.admin_name, COUNT(b.products) as 'CountOfProducts'
FROM table1 a INNER JOIN table2 b ON a.admin_id = b.admin_id
GROUP BY a.admin_name
Use this
SELECT adm.admin_name,COUNT(pdr.products) as ProductCnt
FROM table1 AS adm
JOIN table2 AS pdr
ON adm.admin_id = pdr.admin_id
GROUP BY adm.admin_id;
SELECT t1.admin_name, COUNT(t2.products)
FROM table1 AS t1 LEFT JOIN table2 AS t2 ON t1.admin_id = t2.admin_id
WHERE 1
GROUP BY t2.admin_id
The LEFT JOIN will ensure the cases when table2 doesn't have any record for some admin of table 1.
You can use an inner-select like this:
SELECT
table1.admin_name,
(SELECT COUNT(*)
FROM table2
WHERE table1.admin_id = table2.admin_id) As cnt
FROM
table1;
I have three tables
t1
CustId Name
1 XYZ
2 PQR
t2
CustId Income
1 100
1 200
2 50
2 100
t3
CustId Expense
1 50
1 70
2 30
2 40
I need to run a query where I get the below result
CustId Total Income Total Expense
1 300 120
2 150 70
I have tried the normal SUM and Group By but the result is very different from the expected...
The Query I attempted was
SELECT t1.custid, SUM(t2.Income), SUM(t3.Expense) FROM t1
LEFT JOIN t2 ON t1.custId = t2.CustId
LEFT JOIN t3 ON t1.CustId = t3.CustId
GROUP BY t1.CustId
Any help you would appreciated....
Try below query.
SELECT t1.CustID, IFNULL(tbl1.Income,0) AS 'TotalIncome', IFNULL(tbl2.Expenses,0) AS 'TotalExpenses'
FROM t1
LEFT JOIN (SELECT t2.CustID,SUM(Income) AS 'Income' FROM t2 GROUP BY t2.CustID) tbl1
ON t1.CustID = tbl1.CustID
LEFT JOIN (SELECT t3.CustID,SUM(Expenses) AS 'Expenses' FROM t3 GROUP BY t3.CustID) tbl2
ON t1.CustID = tbl2.CustID;
SQL Fiddle: http://sqlfiddle.com/#!9/ad05d/8
Try doing inner join all three tables and then grouping the result by customer id like:
SELECT t1.custId, SUM(t2.Income), SUM(t3.expense)
FROM t1 INNER JOIN t2
ON t1.custId = t2.custId
INNER JOIN t3
ON t2.custId = t3.custId
GROUP BY t1.custId
You can use the following query to achieve what you want
SELECT t1.custid, ti.Income, te.expense FROM t1 LEFT JOIN (select t2.custId, sum(t2.Income) as income from t2 group by t2.custId) as ti ON t1.custId = ti.CustId LEFT JOIN (select t3.custId, sum(t3.Expense) as expense from t3 group by t3.custId) as te ON t1.CustId = te.CustId
As far as why your previous query did not worked. I can give the following explanation.
In SQL when ever you do a join, the way database internally makes a cartesian product of all the entries and depending on the where clause the data is returned. So when you did
SELECT t1.custid, SUM(t2.Income), SUM(t3.Expense) FROM t1 LEFT JOIN t2 ON t1.custId = t2.CustId
You got 4 rows, where customerId is repeated in the rows, now when you join with t3 table by applying the equal condition on customerId, database would be able to match customerID in two records and hence you get 8 rows. That is why your query was not working
table1
cid
itemdesc
itemprice
table2
cid
imagename
status
My 1st table is has unique cid (no duplicate) I want it to LEFT JOIN TO table2 but it has multiple rows per cid
cid imagename status
1 image1-of-cid1 test1
1 image2-of-cid1 test2
2 image1-of-cid2 test3
2 image2-of-cid2 test4
2 image3-of-cid2 test5
But I only want the Query to return the the 1st row only of the each record fom table 1
Thanks
I agree with John Woo's answer above. You need a subquery of some kind to actually retrieve the first row of table 2. Something like:
SELECT
t1.[id],
t2.*
FROM table1 AS t1
LEFT JOIN table2 AS t2
ON t2.cid = (SELECT TOP 1 cid FROM table2 WHERE cid = t1.cid)
you need to create an extra subquery that gets one imagename per cid. try this,
SELECT a.*, b.*
FROM table1 a
LEFT JOIN
(
SELECT cid, MIN(imagename) minImage
FROM table2
GROUP BY cid
) c ON a.cid = c.cid
LEFT JOIN table2 b
ON c.cid = b.cid AND
b.imageName = c.minImage
SQLFiddle Demo
Select
distinct a.cid,a.itemdesc,b.imagename,a.itemprice,b.status
from table1 a,
table2 b
where a.cid=b.cid
Try this:
SELECT a.cid, a.itemdesc, a.itemprice, b.imagename, b.status
FROM table1 a
LEFT OUTER JOIN table2 AS b ON a.cid = b.cid
GROUP BY a.cid, a.itemdesc, a.itemprice;
Question:
Table 1: id.1 | name.Joe | etc.Some | ...Other | ...Data
Table 2: id.X | number.+1 123 555 9999 | useridfromtable1.1 -> Linking telefone with Joe
Table 3: id. X | number.+1 123 555 9999 | calls.55
I need a query that join the 3 tables and I only have the id (userid) from the table 1.
So, I need from userid -> grab the telephone -> from the telefone grab calls on table3.
Answer:
SELECT t1.name,t1.id,t2.number,t3.calls
FROM table1 t1
INNER JOIN table2 t2 ON t2.useridfromtable=t1.id
INNER JOIN table3 t3 ON t3.number = t2.number
New Question?
Any chance you know how can I print the sum of calls on the result? after all these join I get about 10 lines of the same user and their respective calls based on the phone, what is correct for what I asked, now I need return all the calls in 1 line with the values:
sum | user ID | user Name
Maybe this will be useful:
SELECT SUM(t3.calls) FROM table1 t1 INNER JOIN table2 t2 ON t2.useridfromtable=t1.id INNER JOIN table3 t3 ON t3.number = t2.number
Try this query:
SELECT sum(t3.calls), t1.id, t1.name
FROM table1 t1
INNER JOIN table2 t2 ON t2.useridfromtable=t1.id
INNER JOIN table3 t3 ON t3.number = t2.number
GROUP BY t1.id