PL/SQL stands for Procedural Language extension of SQL. PL/SQL is a combination of SQL along with the procedural features of programming languages. It was developed by Oracle Corporation in the early ...

SELECT COUNT(Marks) FROM Student; -- → 6 (RAHUL has NULL Marks, excluded) SELECT COUNT(Age) FROM Student; -- → 6 (RAHUL has NULL Age, excluded) -- COUNT with WHERE: counts rows matching a condition ...

-- You CANNOT use = or != to check for NULL: -- WHERE Age = NULL → always returns nothing (WRONG) -- WHERE Age != NULL → always returns nothing (WRONG) -- You MUST use IS NULL or IS NOT NULL instead. ...

Vinish Kapoor is an Oracle ACE Pro, software developer, and founder of Vinish.dev, known for his expertise in Oracle. Vinish Kapoor is an Oracle ACE Pro, software developer, and founder of Vinish.dev, ...

Oracle SQL Developer is a great tool for managing Oracle Databases. It has a user-friendly interface that makes it easier to handle database tasks. The software offers features to simplify workflows ...