Description:
Loop through a cursor.
Syntax:
for cs,n;x
Note:
The statement retrieves n records from the cursor and returns or retrieves records till x… has changed. Close the cursor once the retrieval is completed.
This function is often used to fetch a large volume of records by group. Return all the remaining records and close the cursor when omitting n and x.
Parameter:
|
cs |
Cursor |
|
n |
Number of records |
|
x |
Grouping expression, and cs is sorted by x. With x, n can be ignored |
Example:
|
|
A |
B |
|
|
1 |
=demo.cursor("select * from EMPLOYEE order by SALARY desc") |
=[] |
|
|
2 |
for A1,10;SALARY |
|
|
|
3 |
|
>B1.insert(0,A2) |
Loop through the cursor, selecting records with the same SALARY value and inserting them into B1. |