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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.

Modifying and Deleting Tables with SQL

The ALTER statement is used to modify or change the meaning of a table. In the case of the relational tables with columns, ALTER statement is used to update the table to the new or modified rules or definition. Alter belongs to the DDL category of Commands.

Data definition language can be described as a pattern for commands through which data structures are represented. Imagine that you decide to send a birthday card to your customers to show your appreciation for their business, and so you want to add a birthday field to the Customers table. In these SQL examples, you see how easy it is to modify existing tables with the ALTER statement:

ALTER TABLE Customers ADD Birthday varchar(80)

If a table becomes corrupted with bad data you can quickly delete it like this:

DROP TABLE table_name

So, that’s all in this blog. I will meet you soon with next stuff .Have a nice day !!!

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