'If' in 'Select' Statement - Choose Output Value Based on Column Values
Select Id, Amount from Report I Need Amount to Be Amount If Report. Type='P' and -Amount If Report. Type='N'. How Do I Add This to the Above Query? 0 7 Answers...
SELECT id, amount FROM report
I need amount to be amount if report.type='P' and -amount if report.type='N'. How do I add this to the above query?
7 Answers
SELECT id,
IF(type = 'P', amount, amount * -1) as amount
FROM report
See .
Additionally, you could handle when the condition is null. In the case of a null amount:
SELECT id,
IF(type = 'P', IFNULL(amount,0), IFNULL(amount,0) * -1) as amount
FROM report
The part IFNULL(amount,0) means when amount is not null return amount else return 0.
Use a case statement:
select id,
case report.type
when 'P' then amount
when 'N' then -amount
end as amount
from
`report`
SELECT CompanyName,
CASE WHEN Country IN ('USA', 'Canada') THEN 'North America'
WHEN Country = 'Brazil' THEN 'South America'
ELSE 'Europe' END AS Continent
FROM Suppliers
ORDER BY CompanyName;
select
id,
case
when report_type = 'P'
then amount
when report_type = 'N'
then -amount
else null
end
from table
Most simplest way is to use a IF(). Yes Mysql allows you to do conditional logic. IF function takes 3 params CONDITION, TRUE OUTCOME, FALSE OUTCOME.
So Logic is
if report.type = 'p'
amount = amount
else
amount = -1*amount
SQL
SELECT
id, IF(report.type = 'P', abs(amount), -1*abs(amount)) as amount
FROM report
You may skip abs() if all no's are +ve only
SELECT id, amount
FROM report
WHERE type='P'
UNION
SELECT id, (amount * -1) AS amount
FROM report
WHERE type = 'N'
ORDER BY id;
You can try this also
SELECT id , IF(type='p', IFNULL(amount,0), IFNULL(amount,0) * -1) as amount FROM table
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