Question

I have following two tables in the database. One table is person table and other table is Entry table, entry table records the persons entrance to a department

Person Table

    Person                  
Person_ID   Person_NIC  Person_Name Person_Last_Name    Person_Age  State
1           121212          ABC         BCD              12         ACTIVE
2           212121          ABB         BBB              13         NONACTIVE
3           111111          BBB         CCC              14         ACTIVE

Entry Table

ENTRY           
Entry_ID  Person_ID Entry_Escort    Entry_Date  
1         1           David         20121210    
2         1           David         20130110    
3         1           David         20130111    
4         1           David         20130112    
5         1           David     20130113    
6         2           David     20121210    
7         2           David     20130110    
8         2           David     20130111    
9         2           David     20130112    
10        2           David     20130113    

I have to write sql for following scenario. I need to find Last Entry date for persons how are non active in the database for the month of January. could anybody help me with query. thanks in advance for any help.

Answer 1

This should be as as easy as this:

SELECT p.Person_ID, MAX(e.Entry_Date) as MaxEntryDate
FROM 
 Person p 
 INNER JOIN Entry e
   ON p.Person_NIC = e.EntryID
WHERE p.State = 'NONACTIVE'
   AND Entry_Date  BETWEEN 20130101 AND 20130131
GROUP BY p.Person_ID