Multiple IF statements on MYSQL
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10-12-2019 - |
Question
I'm trying to Display somes values in my database result, I am using this code but I can not succeed:
SELECT item_code, IF(category_code = 'HERR1', 'NO', 1) OR (category_code = 'COLN5', 'NO', 2) AS category_code, item_name, item_quantity FROM qa_items
EDIT : I Want to display for example:
If category_code = 'HERR1'
Display = 1
else if category_code = 'COLN5'
Display = 2
End If
If anyone has any idea, would greatly appreciate it
Solution
I'd rather use CASE
:
SELECT item_code,
CASE category_code
WHEN 'HERR1' THEN 1
WHEN 'COLN5' THEN 2
ELSE 'NO'
END as category_code, item_name, item_quantity
FROM qa_items
But IF
will also work : IF(category_code='HERR1',1, IF(category_code='COLN5',2,'NO'))
OTHER TIPS
You need to nest the if statements
SELECT item_code, IF(category_code = 'HERR1', 'NO', IF(category_code = 'COLN5', 1, 2)) AS category_code, item_name, item_quantity FROM qa_items
Then the first if will fail and the nested if will evaluate
Is this what you were after?
SELECT
item_code,
CASE category_code
WHEN 'HERR1' THEN 1
WHEN 'COLN5' THEN 2
ELSE 'NO'
END AS category_code,
item_name,
item_quantity
FROM qa_items
Try the following
SELECT item_code, CASE category_code WHEN 'HERR1' THEN 1 WHEN 'COLN5' THEN 0 ELSE 'NONE' END AS category_code, item_name, item_quantity FROM qa_items
Kindly Use It Simple It Works.
SELECT if(reference_customer_id = 0,sum(((package_priceemployee_percentage)/100)),sum(((package_priceemployee_percentage)/100)))
as direct_commission
In my 3 columns table, one is package_price, employee_percentage, reference_customer_id
.
Now I want if reference_customer_id > 0
then employee percentage as referenced_commission
and if reference_customer_id = 0
then direct commission. I tried below way:
SELECT if(reference_customer_id = 0, sum(((package_price*employee_percentage)/100)) , 0) as direct_commission, if(reference_customer_id > 0, sum(((package_price*employee_percentage)/100)) , 0) as reference_commission
You can try this. Use IF in select query and update the table you want ;)
create table student(marks int,grade char);
insert into student values(200,null),(120,null), (130,null);
UPDATE student a
INNER JOIN (select s.marks, IF(s.marks>=200,'A',IF(s.marks>=130,'B','P')) AS Grade
from student s) b on a.marks= b.marks
SET a.Grade = b.Grade;