good day, i have a problem in querying in 2 mysql table.
table 1
c_id c_name
**-----------------**
1 blah,blah
2 hey
table 2
m_id c_id m_name
-----------------------
1 1 some_name
2 1 some-name
3 1 some/name
4 1 some.name
5 2 name.some
6 2 name-some
i wanted the display to be like this:
c_id c_name m_name
-----------------------------
1 blah,blah some_name
some-name
some/name
some.name
2 hey name.some
name-some
Select a.c_id, a.c_name,
group_concat(b.m_name SEPARATOR '<br/>') as m_name from table1 a
left join table2 b on a.c_id = b.c_id
group by a.c_id;
Fiddle
Use m_name bind to a label. It will come with line breaks
This query will output exactly what you want :
select case when first.m_id is null then ' ' else t1.c_id end c_id,
case when first.m_id is null then ' ' else t1.c_name end c_name,
m_name
from Table1 t1
inner join Table2 t2 on t1.c_id = t2.c_id
left outer join (
select m_id,t1.c_id, t1.c_name, min(m_name)
from Table1 t1
inner join Table2 t2 on t1.c_id = t2.c_id
group by t1.c_id, t1.c_name) first on t2.m_id = first.m_id
order by t1.c_id, t2.m_id
See SQLFIDDLE : http://www.sqlfiddle.com/#!2/4bab3/16/0
You can use join to get the results of both tables together:
select c_id, c_name, m_name from table1 as x left outer join table2 as y on x.c_id = y.c_id;
Select a.c_id, a.c_name, b.m_name from table1 a left join table2 b on a.c_id = b.c_id;
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
I want to get Ronald from Left Table through matching Right Table values with 1 AND 2. I know I need to use DISTINCT to get only one row but other than that, I'm stumped.
Left Table
pid | name
1 Ronald
2 Chris
3 John
Right Table
pid | value
1 1
1 2
2 1
3 2
Joined Table
pid | name | value
1 Ronald 1
1 Ronald 2
2 Chris 1
3 John 2
Expected Output
pid | name
1 Ronald
You want to match both 1 and 2. Aggregation and having come to mind:
select t1.pid, t1.name
from table1 t1 join
table2 t2
on t1.pid = t2.pid
where t2.value in (1, 2)
group by t1.pid, t1.name
having count(*) = 2; -- should be `count(distinct)` if duplicates are possible in `table2`
Self join table2 and select value = 1 in the first and value = 2 in the second. Join the result with table 1.
select t1.pid, t1.name
from table1 t1
join table2 t2_1 on t1.pid = t2_1.pid
join table2 t2_2 on t2_1.pid = t2_2.pid AND t2_1.value = 1 AND t2_2.value = 2
Or if you like that better:
select t1.pid, t1.name
from table1 t1
join table2 t2_1 on t1.pid = t2_1.pid AND t2_1.value = 1
join table2 t2_2 on t2_1.pid = t2_2.pid AND t2_2.value = 2
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;
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;
I have tables
table 1
id text
1 A
1 B
2 C
table 2
id text
1 x
1 f
2 y
2 z
I want to join them this way
1 A x
1 B f
2 C y
2 z
In other words i want to see all texts from table1 and table2 grouped by id, with no repeats.
Any ideas?
Update: as they say in comments, the logic is not clear, I'll try to explain.
I have current values in table_1 and deleted values in table_2.
Customer wants to see current values and deleted values in one table grouped by some id.
Simple solution to get something close to what you're looking for
SELECT t1.id, t1.text, t2.text
FROM tbl_1 t1
INNER JOIN tbl_2 t2
ON t1.id = t2.id
this will create output
1 A x
1 B x
2 C y
2 C z
Only different is now that the duplicated texts x and C should somehow removed.
Update
precondition: duplicates per id are either in tbl_1 or tbl_2 not both !
Joining a grouped select in addition to above simple solution will allow to create kind of "CASE-Filters" to get your desired output.
SELECT
t1.id,
CASE
WHEN t2.text = txt_i2 THEN t1.text
END AS txt_t1,
CASE
WHEN t1.text = txt_i1 THEN t2.text
END AS txt_t2
FROM (
SELECT
i1.id,
i1.text AS txt_i1,
i2.text AS txt_i2
FROM tbl_1 i1
INNER JOIN tbl_2 i2
ON i1.id = i2.id
GROUP BY id
) i
INNER JOIN tbl_1 t1
ON i.id = t1.id
INNER JOIN tbl_2 t2
ON t1.id = t2.id
You should create a view of the tbl_1-tbl_2-join to get more readable SQL:
CREATE OR REPLACE VIEW V_tbl_1_2 AS (
SELECT
t1.id,
t1.text AS txt_1,
t2.text AS txt_2
FROM tbl_1 t1
INNER JOIN tbl_2 t2
ON t1.id = t2.id
)
;
SELECT
t.id,
CASE
WHEN t.txt_2 = i.txt_2 THEN t.txt_1
END AS txt_t1,
CASE
WHEN t.txt_1 = i.txt_1 THEN t.txt_2
END AS txt_t2
FROM V_tbl_1_2 t
INNER JOIN (
SELECT *
FROM V_tbl_1_2
GROUP BY id
) i ON t.id = i.id
;
USE MYSQL VIEW OR JOIN
This works if you can have no more than two items per id in either table and if neither one has complete duplicates. (And I must also add that this can only work if MySQL is able to swallow this monster and not choke with it.)
SELECT
COALESCE (t1.id, t2.id) AS id,
t1.text AS text1,
t2.text AS text2
FROM (
SELECT
t.id,
t.text,
CASE t.text WHEN m.text THEN 1 ELSE 2 END AS rowid
FROM table_1 t
INNER JOIN (
SELECT id, MIN(text) AS text
FROM table_1
GROUP BY id
) m ON t.id = m.id
) t1
FULL JOIN (
SELECT
t.id,
t.text,
CASE t.text WHEN m.text THEN 1 ELSE 2 END AS rowid
FROM table_2 t
INNER JOIN (
SELECT id, MIN(text) AS text
FROM table_2
GROUP BY id
) m ON t.id = m.id
) t2
ON t1.id = t2.id AND t1.rowid = t2.rowid
ORDER BY COALESCE (t1.id, t2.id), COALESCE (t1.rowid, t2.rowid)