I don't suppose it is possible to delete one row among two which are similar of each other in a database through SQL, but it is still recommended that you refer programming language books or online web-sites for detailed information.

SQL generally known as Structured Query Language, is a well known computer language normally applied to create, recover, modernize or erase data from relational database management systems.

The language has developed well beyond its initial purpose to maintain object-relational database management systems, and has also been typified by ANSI and ISO.

SQL is created for a precise, limited function, which is querying data enclosed in a relational database. On the whole it is a set-based, declarative computer language rather than an crucial language like C.