What mistakes should MCA students avoid while learning SQL?

SQL is used to retrieve and manage relational data. A strong MCA learner should practise SELECT queries, joins, grouping, subqueries, transactions and basic database design. A good MCA study plan should leave time for both the theory behind SQL and regular implementation practice. This point is specifically relevant to the SQL aspect of MCA study. For this specific question about SQL, the practical takeaway is to relate the concept to your own MCA learning goal.