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Editorial Team
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Asked: 2026-05-23T02:19:44+00:00

I am using SUM ( CASE WHEN ) to count number of Yes and

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I am using SUM ( CASE WHEN ) to count number of Yes and No, it work fine.

I am havin problem counting number of matching mobile number from two tables. It dont seem to be counting correctly.

There is a MobileNO field in dairy table and mobile field in the sales table

SELECT 
       D.Username, 
       SUM(CASE WHEN D.type = 'Yes' THEN 1 ELSE 0 END) as Yes, 
       SUM(CASE WHEN D.type = 'No' THEN 1 ELSE 0 END) as No, 
       SUM(CASE WHEN D.type = '' THEN 1 ELSE 0 END) as Other, 
       (SELECT SUM(CASE WHEN D.MobileNo = S.mobile THEN 1 ELSE 0 END) from sales as S) as Sales, 
       COUNT(*) as TOTAL FROM dairy as D 
WHERE source = 'Company' AND UNIX_TIMESTAMP(CheckDate) >= 1293840000 AND UNIX_TIMESTAMP(CheckDate) <= 1322697600 
group by D.Username order by TOTAL DESC
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1 Answer

  1. Editorial Team
    SELECT 
       D.Username, 
       SUM(CASE WHEN D.type = 'Yes' THEN 1 ELSE 0 END) as Yes, 
       SUM(CASE WHEN D.type = 'No' THEN 1 ELSE 0 END) as No, 
       SUM(CASE WHEN D.type = '' THEN 1 ELSE 0 END) as Other, 
       SUM(CASE WHEN S.mobile IS NULL THEN 0 ELSE 1 END) as Sales, 
       COUNT(*) as TOTAL 
FROM dairy as D 
LEFT JOIN (SELECT DISTINCT mobile FROM sales) as S ON D.MobileNo = S.mobile
WHERE source = 'Company' AND UNIX_TIMESTAMP(CheckDate) >= 1293840000 AND UNIX_TIMESTAMP(CheckDate) <= 1322697600 
group by D.Username order by TOTAL DESC
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