Question

i have a table with about 100 rows , and i want every time to get rows between number and number , like this

if `i=1` i want to get the rows `0 1 2 3 4`

if `i=2` i want to get the rows `5 6 7 8 9`

if `i=3` i want to get the rows `10 11 12 13 14`

and maybe the last value of i will just take 3 or 4 rows not 5
i think the solution will be something like this

select * from question limit (i-1)*5 , i*5-1

but doesn’t work , cos i don’t know how to use variable in a query , and when i tried it for i=1 it doesn’t work and i got a syntax error

Answer 1

The first parameter to LIMIT is the zero-based starting row index. The second one is the number of rows. So, if you’re always looking for five rows:

SELECT * FROM question LIMIT (i-1)*5 , 5

(You’ll have to calculate (i-1)*5 with whatever language you’re using to build the query, and pass an actual number to MySQL).