Roadmap for SQL
SQL is only this much👇😇
1. Basic SQL Syntax:
SQL keywords
Data types
Operators
SQL statements (SELECT, INSERT, UPDATE, DELETE)
2. Data Definition Language (DDL):
CREATE TABLE
ALTER TABLE
DROP TABLE
Truncate table
3. Data Manipulation Language (DML):
SELECT statement (SELECT, FROM, WHERE, ORDER BY, GROUP BY, HAVING, JOINs)
INSERT statement
UPDATE statement
DELETE statement
4. Aggregate Functions:
SUM, AVG, COUNT, MIN, MAX
GROUP BY clause
HAVING clause
5. Data Constraints:
Primary Key
Foreign Key
Unique
NOT NULL
CHECK
6. Joins:
INNER JOIN
LEFT JOIN
RIGHT JOIN
FULL OUTER JOIN
Self Join
Cross Join
7. Subqueries:
Types of subqueries (scalar, column, row, table)
Nested subqueries
Correlated subqueries
8. Advanced SQL Functions:
String functions (CONCAT, LENGTH, SUBSTRING, REPLACE, UPPER, LOWER)
Date and time functions (DATE, TIME, TIMESTAMP, DATEPART, DATEADD)
Numeric functions
9. Views:
Creating views
Modifying views
Dropping views
10. Indexes:
Creating indexes
Using indexes for query optimization
11. Transactions:
ACID properties
Transaction management (BEGIN, COMMIT, ROLLBACK, SAVEPOINT)
Transaction isolation levels
12. Data Integrity and Security:
Data integrity constraints (referential integrity, entity integrity)
GRANT and REVOKE statements (granting and revoking permissions)
Database security best practices
13. Stored Procedures and Functions:
Creating stored procedures
Executing stored procedures
Creating functions
Using functions in queries
14. Performance Optimization:
Query optimization techniques (using indexes, optimizing joins, reducing subqueries)
Performance tuning best practices
15. Advanced SQL Concepts:
Recursive queries
Pivot and unpivot operations
Window functions (Row_number, rank, dense_rank, lead & lag)
CTEs (Common Table Expressions)
Dynamic SQL
