![]() ![]() Atomicity - Changes in the data must be like a single operation.The WHERE clause is not used in DDL but is used in DML.and those of DML are merged, update, insert, etc. Examples of DDL commands are created, alter, drop, rename, etc.DML provides the row attribute of the table. DDL defines the column attribute of the table.DML adds, retrieves or updates the data in that schema. DDL creates a schema with some constraints.DDL stands for Data Definition language whereas, DML is called Data Manipulation Language.Explain the Difference Between DDL and DML? BCNF:- Boy Codd’s Normal form is a strong representation of 3NF.Ģ.3NF:- For a relation to be in 3NF, it should be in 2NF and additionally no transition dependency exists.2NF:- For a relation to be in 2NF, it should be in 1NF and all the non-key attributes are fully functionally dependent on the primary key.1NF:- If a relationship has an atomic value it is in 1NF.The concept of Normal forms is used to perform normalization on a relation. Normalization is a method of organization of the data in the database to minimize redundancy from a set of relations. Here are some necessary interview questions and answers on SQL that you must learn. Though certain organizations have made a switch to NoSQL, the fundamentals lie in SQL. This is how SQL comes into the picture with data science. ![]()
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