Wie schreibe ich Sub-Abfrage nicht null als Join

Question

select EmpName, EmpCode 
from employees 
where EmpBrnID = 461 and EmpIsActive =1 
    and EmpCode not in (select EmpCode from reports 
         where BranchID = 461 and DAYOFWEEK(InTime)!= 1 
         and InTime BETWEEN '2017-01-31'- INTERVAL 6 DAY AND '2017-01-31'); 

Wie kann ich dies als beitreten schreiben.

Answer 1

select EmpName, EmpCode 
from employees 
left join reports on reports.EmpCode = employees.EmpCode 
    and BranchID = 461 and DAYOFWEEK(InTime)!= 1 
         and InTime BETWEEN '2017-01-31'- INTERVAL 6 DAY AND '2017-01-31' 
where EmpBrnID = 461 and EmpIsActive =1 
    and reports.EmpCode IS NULL 

Answer 2

Meinst du sowas?

SELECT 
    empname 
, empcode 
FROM employees e 
LEFT JOIN reports r 
    ON e.empbrnid=r.branchid 
WHERE e.empbrnid=461 
    AND DAYOFWEEK(intime)!=1 
    AND InTime BETWEEN '2017-01-31'- INTERVAL 6 DAY AND '2017-01-31') 
    AND r.branchid IS NULL 
; 

Es ist also ein linker Join, wo die Spalten der richtigen Tabelle NULL sind.

Beifall -

Marco die Sane