Table Descriptions: batch

bat_id: Integer, primary key. Unique identifier for each batch. bat_name: Variable character string (up to 30 characters). Name of the batch. domain

dom_id: Integer, primary key. Unique identifier for each domain. dom_name: Variable character string (up to 30 characters). Name of the domain. professional

prof_id: Integer, primary key. Unique identifier for each professional. prof_name: Variable character string (up to 30 characters). Name of the professional. salary

sal_id: Integer, primary key. Unique identifier for each salary record. fee

fee_id: Integer, primary key. Unique identifier for each fee record. mentor

men_id: Integer, primary key. Unique identifier for each mentor. men_name: Variable character string (up to 50 characters). Name of the mentor. men_email: Variable character string (up to 50 characters). Email of the mentor. bat_id: Integer, foreign key. References batch(bat_id). prof_id: Integer, foreign key. References professional(prof_id). sal_id: Integer, foreign key. References salary(sal_id). learners

len_id: Integer, primary key. Unique identifier for each learner. len_name: Variable character string (up to 50 characters). Name of the learner. len_email: Variable character string (up to 50 characters). Email of the learner. bat_id: Integer, foreign key. References batch(bat_id). dom_id: Integer, foreign key. References domain(dom_id). fee_id: Integer, foreign key. References fee(fee_id). DESC Command: The DESC (or DESCRIBE) command in SQL is used to display the structure of a table. It provides information about the columns in the table, including:

Field: The name of the column. Type: The data type of the column. Null: Whether the column can contain NULL values. Key: If the column is part of a primary key (PRI), foreign key (MUL), or unique key (UNI). Default: The default value of the column. Extra: Additional information about the column (e.g., if it is auto-increment). When you run DESC table_name;, it outputs the schema of the specified table.