CODEWITHSUNDEEP
mysqlsql
Yoyo
Yoyo

Reputation: 19

MYSQL SELECT WHERE CLAUSE - exclude rows

In MYSQL, let's say I have following two tables.

"orders":

id   |    name    | customer_id |    type   |  id_fabric
--------------------------------------------------------
1    | "P1601"    |      0      |     1     |    1    
2    | "M6451"    |      0      |     2     |    2    
3    | "T8200"    |      8      |     1     |    1    
4    | "R7441"    |      0      |     2     |    2    
5    | "S8018"    |      2      |     1     |    3    
6    | "P1240"    |      7      |     1     |    3

"fabrics":

id    |  color  |  remaining 
----------------------------
1     | black   |  3.40 
2     | red     |  16 
3     | navy    |  12

I would like to create a query to retrieve only the fabrics whose remaining is greater than 5, which don't have any orders with customer_id = 0 of and whose order type is not equal to 2

So in this case the result would be:

id  | color   |  remaining
------------------------------------------------
3   | navy    |  12

I've tried to achieve this by using this following Sql query, but it doesn't get the expected result:

SELECT
    color,
    remaining
FROM
    fabrics
LEFT JOIN orders ON id_fabric = id
WHERE
    remaining > 2 AND id IN(
    SELECT
        id_fabric
    FROM
        orders
    WHERE
        type != 2 AND customer_id != 0
)
GROUP BY
    id

Any idea ?

Upvotes: 1

Views: 138

Answers (5)

Radim Bača
Radim Bača

Reputation: 10711

Use NOT EXISTS

SELECT
    f.color,
    f.remaining
FROM fabrics f
WHERE f.remaining > 5 AND 
    NOT EXISTS(
        SELECT 1
        FROM orders o
        WHERE o.id_fabric = f.id AND
              o.type = 2 AND o.customer_id = 0
    )

Note that also JOIN and GROUP BY can be omitted from your original query.

Upvotes: 2

Fahmi
Fahmi

Reputation: 37493

You can try using correlated subquery

SELECT
    color,
    remaining
FROM
    fabrics
LEFT JOIN orders ON id_fabric = id where remaining > 5 and 
not exists (select 1 from orders o where o.id_fabric=fabrics.id and o.customer_id=0 and o.type=2)

Upvotes: 0

Ancaron
Ancaron

Reputation: 504

I don't think that subselect in your where condition is necessary in this case. You could simply go ahead like 

SELECT
    color,
    remaining
FROM
    fabrics
LEFT JOIN orders ON id_fabric = id
WHERE
    remaining > 2  
    AND customer_id!=0
    AND type != 0
GROUP BY
    id

Upvotes: 0

Siva
Siva

Reputation: 1529

Using JOIN and WHERE condition and 'GROUP BY`

id is same filed in both tables so use the alies name for tables.

select f.id,f.color,f.remaining
from fabrics f
join orders o on o.id_fabric  = f.id
where f.remaining > 2 and o.type !=2 and o.customer_id!=0
group by f.id

Upvotes: 0

Zaynul Abadin Tuhin
Zaynul Abadin Tuhin

Reputation: 32021

try like below

SELECT
    color,
    remaining
FROM
    fabrics
 JOIN orders ON id_fabric = id
where customer_id!=0 and remaining>5 and type!=2

Upvotes: 0

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