Consider the following emp relation and rename it with your name:                                 emp_no ,  emp_name  , emp_grade , emp_salary ,    dept_no  , start_date Insert Some data in above table: apply truncate and drop command on the table to show the difference between both commands. Drop constraint from emp_no and consider deptno as primary key. Note: this question is from database subject

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Normalization

Normalization is the process of eliminating redundancy in a database by organizing the data into several smaller tables. The large tables are normalized (converted) into smaller tables by using normalization rules, so that a database administrator can easily handle them. It also eliminates insertion, deletion, and update anomalies.