14. SQL: SQL Database Operations
Creating Database and Tables:
• CREATE DATABASE database_name;
• CREATE TABLE table_name (column1 datatype, column2 datatype, ...);
Inserting Data:
• INSERT INTO table_name (column1, column2, ...) VALUES (value1,
value2, ...);
Updating Data:
• UPDATE table_name SET column_name = new_value WHERE
condition;
Deleting Data:
• DELETE FROM table_name WHERE condition;
15. SQL: SQL Database Operations
Joins:
Combine rows from multiple tables based on related columns
Types: INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL JOIN
Aggregation Functions:
Perform calculations on groups of rows
Examples: SUM, AVG, COUNT, MAX, MIN
Constraints:
Rules applied to columns to enforce data integrity
Examples: PRIMARY KEY, FOREIGN KEY, NOT NULL
16. Summary
• Database Management System (DBMS) is essential for efficient data
management.
• SQL is a powerful language for interacting with relational databases.
• Understanding DBMS and SQL enables effective data storage, retrieval, and
manipulation.
