2026-09-25

Daily challenge

One problem a day, the same one for everybody. Solve it to keep your streak alive.

current streak

0 days

longest streak

dailies done

SQL · Easy

Join orders to customers

Activity

Every square is a day; filled squares are dailies you completed.

mwf

streak saved on this device — sign in to keep it everywhere

Badges

first blood

0/1

Solve your first problem

ten down

0/10

Solve 10 problems

grinder

0/20

Solve 20 problems

warming up

0/3

3-day daily streak

week strong

0/7

7-day daily streak

unbroken

0/30

30-day daily streak

regular

0/10

Complete 10 daily challenges

scholar

0/15

Finish 15 lessons