Intermediate SQL Tutorial
Master intermediate SQL concepts including Aggregate Functions, GROUP BY, HAVING, Subqueries, Joins, CASE statements, COALESCE, String, Date, Mathematical functions, Views, and Indexes.
sql coalesce
SQL COALESCE, NULLIF, and NVL Functions
Learn SQL COALESCE, NULLIF, and NVL functions with examples. Handle NULL values, avoid division errors, and provide default values in SQL queries.