Comparative select on the same table (mysql)
I'm really newbie with mysql and i'm tryin to do a simple select, but I can't figure it out.
Thats what I have:
I got this in a Table named Control:
| CODE | OFFICE |
| 1 | usa |
| 2 | usa |
| 3 | usa |
| 4 | usa |
| 5 | usa |
| 1 | china |
| 3 | china |
| 4 | china |
And I need get this:
| CODE | OFFICE |
| 2 | usa |
| 5 | usa |
Then, SELECT code,office WHERE the codes still aren't registered with office = china.
I have to make a self join or something like that or use GROUP BY statement ?
I'm stuck here... I really would appreciate any help.
mysql select statements
edited Nov 15 '18 at 16:48
Madhur Bhaiya
19.6k62236
asked Nov 14 '18 at 23:21
Irvıng Ngr'Irvıng Ngr'
396
add a comment |
I'm really newbie with mysql and i'm tryin to do a simple select, but I can't figure it out.
Thats what I have:
I got this in a Table named Control:
| CODE | OFFICE |
| 1 | usa |
| 2 | usa |
| 3 | usa |
| 4 | usa |
| 5 | usa |
| 1 | china |
| 3 | china |
| 4 | china |
And I need get this:
| CODE | OFFICE |
| 2 | usa |
| 5 | usa |
Then, SELECT code,office WHERE the codes still aren't registered with office = china.
I have to make a self join or something like that or use GROUP BY statement ?
I'm stuck here... I really would appreciate any help.
mysql select statements
edited Nov 15 '18 at 16:48
Madhur Bhaiya
19.6k62236
asked Nov 14 '18 at 23:21
Irvıng Ngr'Irvıng Ngr'
396
add a comment |
I'm really newbie with mysql and i'm tryin to do a simple select, but I can't figure it out.
Thats what I have:
I got this in a Table named Control:
| CODE | OFFICE |
| 1 | usa |
| 2 | usa |
| 3 | usa |
| 4 | usa |
| 5 | usa |
| 1 | china |
| 3 | china |
| 4 | china |
And I need get this:
| CODE | OFFICE |
| 2 | usa |
| 5 | usa |
Then, SELECT code,office WHERE the codes still aren't registered with office = china.
I have to make a self join or something like that or use GROUP BY statement ?
I'm stuck here... I really would appreciate any help.
mysql select statements
edited Nov 15 '18 at 16:48
Madhur Bhaiya
19.6k62236
asked Nov 14 '18 at 23:21
Irvıng Ngr'Irvıng Ngr'
396
I'm really newbie with mysql and i'm tryin to do a simple select, but I can't figure it out.
Thats what I have:
I got this in a Table named Control:
| CODE | OFFICE |
| 1 | usa |
| 2 | usa |
| 3 | usa |
| 4 | usa |
| 5 | usa |
| 1 | china |
| 3 | china |
| 4 | china |
And I need get this:
| CODE | OFFICE |
| 2 | usa |
| 5 | usa |
Then, SELECT code,office WHERE the codes still aren't registered with office = china.
I have to make a self join or something like that or use GROUP BY statement ?
I'm stuck here... I really would appreciate any help.
mysql select statements
mysql select statements
edited Nov 15 '18 at 16:48
Madhur Bhaiya
19.6k62236
asked Nov 14 '18 at 23:21
Irvıng Ngr'Irvıng Ngr'
396
edited Nov 15 '18 at 16:48
Madhur Bhaiya
19.6k62236
asked Nov 14 '18 at 23:21
Irvıng Ngr'Irvıng Ngr'
396
edited Nov 15 '18 at 16:48
Madhur Bhaiya
19.6k62236
edited Nov 15 '18 at 16:48
Madhur Bhaiya
19.6k62236
edited Nov 15 '18 at 16:48
Madhur Bhaiya
19.6k62236
19.6k62236
asked Nov 14 '18 at 23:21
Irvıng Ngr'Irvıng Ngr'
396
asked Nov 14 '18 at 23:21
Irvıng Ngr'Irvıng Ngr'
396
asked Nov 14 '18 at 23:21
Irvıng Ngr'Irvıng Ngr'
396
396
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
I guess this is working
create table Test(id integer, code integer, office varchar(100));
insert into Test(id, code, office) values(1, 1, "usa"),(2, 2, "usa"),(3, 3, "usa"),(4, 4, "usa"),(5, 5, "usa"),(6, 1, "china"),(7, 3, "china"),(8, 4, "china");
select * from Test;
Select * from Test where code NOT IN (select code from Test where office = "china");
You have use sub query.
answered Nov 15 '18 at 6:26
Prashant Deshmukh.....Prashant Deshmukh.....
68658
Thanks so much @Prashant , that worked!
– Irvıng Ngr'
Nov 15 '18 at 18:02
add a comment |
You can do a "Self-Left-Join" on Code, and consider only those rows where no match was found in the Right side, i.e., right side value IS NULL
SELECT
tleft.*
FROM Control AS tleft
LEFT JOIN Control AS tright
ON tright.Code = tleft.Code AND
tright.Office = 'china'
WHERE tleft.Office = 'usa' AND
tright.Code IS NULL -- this filters no matching code found in china
answered Nov 15 '18 at 16:53
Madhur BhaiyaMadhur Bhaiya
19.6k62236
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
I guess this is working
create table Test(id integer, code integer, office varchar(100));
insert into Test(id, code, office) values(1, 1, "usa"),(2, 2, "usa"),(3, 3, "usa"),(4, 4, "usa"),(5, 5, "usa"),(6, 1, "china"),(7, 3, "china"),(8, 4, "china");
select * from Test;
Select * from Test where code NOT IN (select code from Test where office = "china");
You have use sub query.
answered Nov 15 '18 at 6:26
Prashant Deshmukh.....Prashant Deshmukh.....
68658
Thanks so much @Prashant , that worked!
– Irvıng Ngr'
Nov 15 '18 at 18:02
add a comment |
I guess this is working
create table Test(id integer, code integer, office varchar(100));
insert into Test(id, code, office) values(1, 1, "usa"),(2, 2, "usa"),(3, 3, "usa"),(4, 4, "usa"),(5, 5, "usa"),(6, 1, "china"),(7, 3, "china"),(8, 4, "china");
select * from Test;
Select * from Test where code NOT IN (select code from Test where office = "china");
You have use sub query.
answered Nov 15 '18 at 6:26
Prashant Deshmukh.....Prashant Deshmukh.....
68658
Thanks so much @Prashant , that worked!
– Irvıng Ngr'
Nov 15 '18 at 18:02
add a comment |
I guess this is working
create table Test(id integer, code integer, office varchar(100));
insert into Test(id, code, office) values(1, 1, "usa"),(2, 2, "usa"),(3, 3, "usa"),(4, 4, "usa"),(5, 5, "usa"),(6, 1, "china"),(7, 3, "china"),(8, 4, "china");
select * from Test;
Select * from Test where code NOT IN (select code from Test where office = "china");
You have use sub query.
answered Nov 15 '18 at 6:26
Prashant Deshmukh.....Prashant Deshmukh.....
68658
I guess this is working
create table Test(id integer, code integer, office varchar(100));
insert into Test(id, code, office) values(1, 1, "usa"),(2, 2, "usa"),(3, 3, "usa"),(4, 4, "usa"),(5, 5, "usa"),(6, 1, "china"),(7, 3, "china"),(8, 4, "china");
select * from Test;
Select * from Test where code NOT IN (select code from Test where office = "china");
You have use sub query.
answered Nov 15 '18 at 6:26
Prashant Deshmukh.....Prashant Deshmukh.....
68658
answered Nov 15 '18 at 6:26
Prashant Deshmukh.....Prashant Deshmukh.....
68658
answered Nov 15 '18 at 6:26
Prashant Deshmukh.....Prashant Deshmukh.....
68658
answered Nov 15 '18 at 6:26
Prashant Deshmukh.....Prashant Deshmukh.....
68658
68658
Thanks so much @Prashant , that worked!
– Irvıng Ngr'
Nov 15 '18 at 18:02
add a comment |
Thanks so much @Prashant , that worked!
– Irvıng Ngr'
Nov 15 '18 at 18:02
Thanks so much @Prashant , that worked!
– Irvıng Ngr'
Nov 15 '18 at 18:02
Thanks so much @Prashant , that worked!
– Irvıng Ngr'
Nov 15 '18 at 18:02
add a comment |
You can do a "Self-Left-Join" on Code, and consider only those rows where no match was found in the Right side, i.e., right side value IS NULL
SELECT
tleft.*
FROM Control AS tleft
LEFT JOIN Control AS tright
ON tright.Code = tleft.Code AND
tright.Office = 'china'
WHERE tleft.Office = 'usa' AND
tright.Code IS NULL -- this filters no matching code found in china
answered Nov 15 '18 at 16:53
Madhur BhaiyaMadhur Bhaiya
19.6k62236
add a comment |
You can do a "Self-Left-Join" on Code, and consider only those rows where no match was found in the Right side, i.e., right side value IS NULL
SELECT
tleft.*
FROM Control AS tleft
LEFT JOIN Control AS tright
ON tright.Code = tleft.Code AND
tright.Office = 'china'
WHERE tleft.Office = 'usa' AND
tright.Code IS NULL -- this filters no matching code found in china
answered Nov 15 '18 at 16:53
Madhur BhaiyaMadhur Bhaiya
19.6k62236
add a comment |
You can do a "Self-Left-Join" on Code, and consider only those rows where no match was found in the Right side, i.e., right side value IS NULL
SELECT
tleft.*
FROM Control AS tleft
LEFT JOIN Control AS tright
ON tright.Code = tleft.Code AND
tright.Office = 'china'
WHERE tleft.Office = 'usa' AND
tright.Code IS NULL -- this filters no matching code found in china
answered Nov 15 '18 at 16:53
Madhur BhaiyaMadhur Bhaiya
19.6k62236
You can do a "Self-Left-Join" on Code, and consider only those rows where no match was found in the Right side, i.e., right side value IS NULL
SELECT
tleft.*
FROM Control AS tleft
LEFT JOIN Control AS tright
ON tright.Code = tleft.Code AND
tright.Office = 'china'
WHERE tleft.Office = 'usa' AND
tright.Code IS NULL -- this filters no matching code found in china
answered Nov 15 '18 at 16:53
Madhur BhaiyaMadhur Bhaiya
19.6k62236
answered Nov 15 '18 at 16:53
Madhur BhaiyaMadhur Bhaiya
19.6k62236
answered Nov 15 '18 at 16:53
Madhur BhaiyaMadhur Bhaiya
19.6k62236
answered Nov 15 '18 at 16:53
Madhur BhaiyaMadhur Bhaiya
19.6k62236
19.6k62236
add a comment |
add a comment |
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