SQL - Count records & update multiple columns depending on value - mysql

Question

I have two tables ... accounts & tax. In table tax I would like to updated records (?) depending on column category available in table accounts like this:
table 'accounts'
id|cat2|cat3
1|A|Active
2|A|Active
3|A|Inactive
4|A|Active
5|B|Inactive
6|B|Active
table 'tax'
id|category|count_total|count_active|count_inactive
1|A|?|?|?
2|B|?|?|?
Desired result:
id|category|count_total|count_active|count_inactive
1|A|4|3|1
2|B|2|1|1
For count_total I tried this:
UPDATE tax t2,
( SELECT count(*)
FROM accounts
) t1
SET t2.count_total = t1.count(*)
WHERE t1.cat2 = t2.category;

Answer 1

You can use join to update your tax table
UPDATE tax t2
JOIN (
SELECT
cat2,
COUNT(*) cnt,
SUM(cat3 = 'Active') count_active,
SUM(cat3 = 'Inactive') count_inactive
FROM
accounts
GROUP BY cat2
) t1
ON t1.cat2 = t2.category
SET t2.count_total = t1.cnt ,
t2.count_active = t1.count_active,
t2.count_inactive = t1.count_inactive
Demo

Answer 2

Another version without JOIN:
UPDATE tax
SET
count_total = (
SELECT COUNT(*)
FROM accounts
WHERE accounts.cat2 = tax.category
),
count_active = (
SELECT COUNT(*)
FROM accounts
WHERE accounts.cat2 = tax.category AND accounts.cat3 = 'Active'
),
count_inactive = (
SELECT COUNT(*)
FROM accounts
WHERE accounts.cat2 = tax.category AND accounts.cat3 = 'Inactive'
);
Demo