What is a category in SQL?

Question

SQL statements are traditionally divided into the following logical categories: Data definition statements. These data definition language (DDL) statements can declare, rename, modify, or destroy objects in the local database. Data manipulation statements.

What are categories in SQL?

These SQL commands are mainly categorized into four categories as:DDL – Data Definition Language.DQl – Data Query Language.DML – Data Manipulation Language.DCL – Data Control Language.

What is category in database?

Categories are child tables of a parent table. For example, an employee record (the parent) might contain a job-type column; category tables for that column might include engineer, technician, and administrator.

What is a category in a table?

When you categorize a table using the values in a column, Numbers creates a different category for each unique value in the column. The column whose value you use to create categories is the category value column. All rows containing the same value in the category value column are placed together in a category.

Is Category A SQL keyword?

category is indeed a keyword, and for that reason it is a really bad idea to use it as a column name. However, the use of keywords (which are not reserved - a much shorter list) as column names is not illegal, and you can reference the column name without escaping it.

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