如何在mysql中加入表

Question

我的要求是：

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

现在是SQL，如果问题太简单，请原谅

Answer 1

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

Answer 2

使用相关子查询：

globals