Understanding UNION in MySQL

Understanding UNION in MySQL

Assuming there are tables EMP and EMP2, which have the same schema, and there are possible duplicate IDs present in them???the following query will help us identify the unique records:

Schema:

CREATE TABLE EMP (NAME VARCHAR(30), ID INT(5))CREATE TABLE EMP2 (NAME VARCHAR(30), ID INT(5))

Query:

SELECT ID FROM EMP UNION SELECT ID FROM EMP2;
Share the Post:
data observability

Data Observability Explained

Data is the lifeblood of any successful business, as it is the driving force behind critical decision-making, insight generation, and strategic development. However, due to its intricate nature, ensuring the

Heading photo, Metadata.

What is Metadata?

What is metadata? Well, It’s an odd concept to wrap your head around. Metadata is essentially the secondary layer of data that tracks details about the “regular” data. The regular