SQL
What are joins in SQL?What are Constraints?What do you mean by data integrity?Difference between Clustered and Non-clustered index in SQL?What are Entities and Relationships?What is difference between SQL and MySQL?What is the difference between CHAR and VARCHAR2 datatype in SQL?What is an Index?explain different types of index ?What is the difference between DROP and TRUNCATE commands?What is the difference between cross join and natural join?What is SQL Injection?How many Aggregate functions are available in SQL?What is the difference between the WHERE and HAVING clauses?How do we use the DISTINCT statement? What is its use?What are the syntax and use of the COALESCE function?Explain character-manipulation functions? Explains its different types in SQLWhat is meant by case manipulation functions? Explains its different types in SQLWhat is the difference between DELETE and TRUNCATE statements?What is the difference between IN and BETWEEN operators?What is the difference between clustered and non-clustered indexes in SQL?What is the difference between SQL and PL/SQL?What are the differences between SQL, MySQL, and SQL Server?What is subquery in SQL?What is the difference between the RANK() and DENSE_RANK() functions?