2.2.1 Introduction to SQL

2.2.1 Introduction to SQL

overview of the SQL Query Language
Data-definition language(DDL)
defining relation schemas, deleting relation, and modifying relation schemas.

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Date-manipulation language(DML)
query information, insert tuple, delete tuple, modify tuple

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integrity
view definition
transaction control
embedded SQL and dynamic SQL
authorization

SQL Data Definition
Basic Structure of SQL Queries
Additional Basic Operations
Set Operations
Null Values
Aggregate Functions
Nested Subqueries
Modification of the Database