在另一個查詢中查詢加入兩個表

Question

我有2個表mstEmp和每日出勤。現在我想運行一個查詢

SELECT 
    mstEmp.empname, 
    dailyattendance.InTime, 
    dailyattendance.OutTime, 
    mstEmp.teamtype 
FROM 
    dailyattendance , 
    mstEmp mstEmp 
where 
    dailyattendance.HolderName IN (
    select mstEmp.empname from mstEmp where mstEmp.teamtype='$chk') 

這裏teamtype匹配和對應的名稱是從mstEmp取出，然後用dailyattendance.HolderName匹配的顯示結果。

Answer 1

這個怎麼樣::

SELECT 
    mstEmp.empname, 
    dailyattendance.InTime, 
    dailyattendance.OutTime, 
    mstEmp.teamtype 

    FROM dailyattendance inner join mstEmp on (dailyattendance.HolderName = mstEmp.empname) 

    where mstEmp.teamtype='$chk' 
    group by mstEmp.empname