SQL (Structured Query Language) is used to manage relational database management systems (RDBMS). The scope of SQL includes data insertion, query, update and deletion, database schema creation and modification, and data access control.
SQL I
SQL I

SQL I

Avg. 2~4 problems / day 10 day

Easy
29
Medium
4
Hard
0
SQL II
SQL II

SQL II

Avg. 2~4 problems / day 11 day

Easy
13
Medium
24
Hard
1
SQL III
SQL III

SQL III

Avg. 2~4 problems / day 10 day

Easy
1
Medium
17
Hard
11