使用x-'WHERE'语句计算记录并将其分配给x个变量

Question

表格realestate中的

我希望得到 字段address <＆lt; = 5且＆gt; = 0的记录数，并将其分配给counta
字段address为＆lt; = 12且＆gt; = 6并将其分配给countb

的记录数

依旧......

Answer 1

select (select count(address) 
        from realestate 
        where address <= 5 and address >= 0) as counta,
       (select count(address) 
        from realestate 
        where address <= 12 and adress >= 6) as countb

Answer 2

可能更容易阅读between：

select
    (select count(address) from realestate 
    where address between 0 and 5) as counta,
    (select count(address) from realestate 
    where address between 6 and 12) as countb