如何加入一個表中的MySQL

Question

我的要求是這樣的：現在到SQL

select (*ALL columns of table1, [count of rows of TABLE2 where TABLE1.id = Table2.id] 
from TABLE1, TABLE2 
where TABLE1.status = 'A' 

上午，請原諒如果問題太簡單了

Answer 1

使用相關子查詢：

SELECT t1.* 
    ,(SELECT COUNT(*) FROM TABLE2 t2 WHERE t1.id = t2.id) AS Counter 
FROM TABLE1 t1 
WHERE t1.status = 'A'; 

Answer 2

select t1.col1, t1.col2, t1.col3, count(t2.id) 
from table1 t1 
left join TABLE2 t2 on t1.id = t2.id 
where t1.status = 'A' 
group by t1.col1, t1.col2, t1.col3