Doubling the Power with UNION
Hello All,
Hope this post finds you in good health and spirit.
Structured Query Language, abbreviated as SQL, is a domain-specific language used in programming and designed for managing data held in a relational database management system, or for stream processing in a relational data stream management system.
An good developer must be familiar with a few commands in SQL because it is such a strong development tool. The SQL queries listed below are important for coding and optimization. Almost every system that interacts with a SQL database will be affected by each query in the SQL tutorial.
Doubling the Power with UNION in SQL
We can combine the results of two SQL query examples into one naturally with the UNION keyword. Suppose we want to create a new table by combining the Customer_name and phone from Customers with a list of that customer’s recent orders so that we can look for patterns and perhaps suggest future purchases. Here is a quick way to accomplish the task:
SELECT phone FROM Customers UNION SELECT item FROM Order
The UNION keyword makes it possible to combine JOINS and other criteria to achieve a very powerful new table generation potential. So, that’s all in this blog. I will meet you soon with next stuff .Have a nice day !!!
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