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Structure Query Language (SQL) Tutorials, Articles

Latest Articles, Tutorials, Examples on SQL

1. Introduction to Structure Query Language (SQL)
2. What are the clause, Keywords and statement in SQL?
3. SQL - CREATE Command (to create Database and Table)
4. SQL - SELECT Command (to retrieve data from table/view)
5. SQL - DELETE Statement (to delete records/table)
6. Difference between Delete and Truncate Command in SQL
7. Difference between Drop and Truncate Command in SQL
8. SQL - INSERT INTO Statement (to insert/add record into table)
9. SQL - UPDATE Statement (to update record in table)
10. SQL - ALTER TABLE statement (to modify table definition)
11. SQL - WHERE Clause (to filter data)
12. SQL - VIEW AND DUAL
13. SQL - GROUP BY and ORDER BY
14. SQL - HAVING Clause
15. SQL INDEX - To speedup data retrieval operations
16. Transactions (Properties and Control Commands) in SQL
17. SQL - Explain VIEW with Examples
18. Wildcard Operators in SQL
19. Wildcards Examples in SQL
20. Implement CREATE VIEW in SQL
21. How to use UNION in SQL?
22. Temporary tables in SQL
23. How can we use Sub Queries in SQL?
24. Clone data between tables in SQL
25. How to handle duplicate data in SQL?
26. Alterations on table in SQL
27. Using TRUNCATE TABLE in SQL
28. Sort resultSet using ORDER BY clause in SQL
29. SQL query to find duplicate records
30. SQL query to join two tables
31. SQL query to delete duplicate records
32. SQL query to change column name
33. SQL query to add values in column
34. SQL query to add primary key
35. SQL Query to alter column size
36. SQL Query to auto increment primary key
37. SQL Query to avoid duplicate records
38. SQL Query to access first and last N records from a table
39. SQL Clauses
40. Transaction Control Language (TCL) commands in SQL
41. SQL Alias
42. Difference between WHERE and HAVING clauses in SQL
43. SQL Joins Tutorial with Queries and Examples
44. How to use AND/ OR Operator in SQL?
45. Use of Injection in SQL
46. SELECT TOP with Example in SQL
47. IN Operator with Example in SQL
48. How to use Foreign Key in SQL?
49. Use of CHECK Constraint in SQL
50. Use of DEFAULT Constraint in SQL

SQL Functions

1. NULL VALUES and NULL FUNCTIONS in SQL
2. Use of LEN(), ROUND() functions in SQL
3. Use of DATES and its different built-in functions NOW(), FORMAT() in SQL
4. Use of UCASE(), LCASE() and MID() functions in SQL

SQL Queries

• Find record of nth highest salary employee in SQL
• SQL Query to find the Nth minimum Salary
• SQL Query to fetch (print) Even and Odd records from a table
• SQL Query to merge N columns as single column from a table