Django,MSSQL 服务器查询和分页

Question

This is a sample of my MSSQL server table

Employeetable

emp_id  name  status 
EMP001  A     STATUS-A
EMP001  A     STATUS-B
EMP002  B     STATUS-C
EMP001  A     STATUS-D
EMP002  B     STATUS-D
EMP003  C     STATUS-C

Now in my app front end page there is a table in which each employee is listed once in the table and expanding each employee will show their every available status. I had tried to fetch using pyodbc

For Example:

EMPID   NAME 
EMP001  A
---STATUS-A  #After expanding the EMP001 row it shows all the status of EMP001
---STATUS-B
---STATUS-D
EMP002  B
EMP003  C  

So how can we use pagination in this consider there are about 200K records and about 100K distinct employees

Answer 1

There are two approaches to do it:

1.lazy loading

2. Use arraysize parameter in the cursor that mean you will not fetch all data from database , but batch calling, this one takes less memory but more reads from DB, which can make your app work slower, from the other hand if more users only use first or second page this will be more effective