Publisher's Synopsis
SQL is a Structured Query Language, the language used to perform operations on databases, including adding, updating, or deleting data from the database, or to modify the database itself.SQL architecture: SQL instructions are executed on tables in databases, and those tables consist of columns and records; instructions are composed of reserved words, variables, and transactions (and so on) that determine what operation we want to perform.SQL declares the end result of the process that we want to do, not the details of how that process is performed, as the database engines are responsible for those details.The following example shows the use of the SELECT query to select two columns from a table, with an alternate name (AS) for a column, to specify which records a WHERE condition applies, and to sort them by ORDER BY: SELECT name, age*365 AS AgeDaysFROM studentsWHERE age > 10ORDER BY name;This directory is designed by assigning a page to each reserved word or word or parameter in SQL. The name of that page is in lowercase letters. If the phrase consists of more than one word separated by an underscore; for example, the SELECT query page will be on the SQL / select link, They are present in SQL / order_by and so on ...Its history: In June 1970, the British scientist Edgar Cod published a scientific paper entitled "Interconnected Model of Data for Large Shared Data Banks" in which he presented a model for database creation and management known as Relational Database Model... in book
