Posts

Showing posts with the label pl-sql-reserved-words

Featured Post

SQL Query: 3 Methods for Calculating Cumulative SUM

Image
SQL provides various constructs for calculating cumulative sums, offering flexibility and efficiency in data analysis. In this article, we explore three distinct SQL queries that facilitate the computation of cumulative sums. Each query leverages different SQL constructs to achieve the desired outcome, catering to diverse analytical needs and preferences. Using Window Functions (e.g., PostgreSQL, SQL Server, Oracle) SELECT id, value, SUM(value) OVER (ORDER BY id) AS cumulative_sum  FROM your_table; This query uses the SUM() window function with the OVER clause to calculate the cumulative sum of the value column ordered by the id column. Using Subqueries (e.g., MySQL, SQLite): SELECT t1.id, t1.value, SUM(t2.value) AS cumulative_sum FROM your_table t1 JOIN your_table t2 ON t1.id >= t2.id GROUP BY t1.id, t1.value ORDER BY t1.id; This query uses a self-join to calculate the cumulative sum. It joins the table with itself, matching rows where the id in the first table is greater than or

SQL PLSQL Top Reserved Keywords

Image
To become perfect in PL/SQL is an art. Knowing of top reserved words helps you to be a master in SQL. Before you start knowing reserved words, wait one moment. The reserved words are similar to the words that you use in normal SQL. SQL, PLSQL Reserved Words PL/SQL Reserved Words A Video on Basic PL/SQL Basic PL/SQL Video Lesson for all professionals. Related Posts 32 Complex SQL Queries popular e-book Introduction to SQL and PLSQL by Ruchin Jain