The Iris Data Set is perhaps the best known database. The data set contains 3 classes of 50 instances each, where each class refers to a type of iris plant. Get the data set from: https://archive.ics.uci.edu/ml/machine-learning-databases/iris/iris.data You can use any text editor to open it.

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A: The answer is discussed in the below step

Q: What are all the different types of indexes?

A: - We need to talk about the different types of indexes.

Q: for DML, DCL, and DDL should be kept in the database.

A:

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A: Here is the answer:

Intermediate SQL Concepts

A query is a request for data or information from one or more database tables. This information could be presented in the form of pictorials, graphs, or complicated findings which helps in easy interpretation. Structured Query Language (SQL) is the most widely used programming language for retrieving and organizing data from relational databases. Collection of tables with rows and columns is referred to as a database. SQL is the language of databases. It makes it easier to extract specific data from databases, which can then be used for analysis.