Dark Technology

Dark Technology : the world of programming and internet techniques SQL SQL, ‘Structured Query Language’, is a programming language designed to manage data stored in relational databases. SQL operates through simple, declarative statements. This keeps data accurate and secure, and helps maintain the integrity of databases, regardless of size. ALTER TABLE ALTER TABLE table_name ADD column datatype; ALTER TABLE  lets you add columns to a table in a database. AND SELECT column_name(s) FROM table_name WHERE column_1 = value_1 AND column_2 = value_2; AND  is an operator that combines two conditions. Both conditions must be true for the row to be included in the result set. AS SELECT column_name AS 'Alias' FROM table_name; AS  is a keyword in SQL that allows you to rename a column or table using an  alias . AVG SELECT AVG (column_name) FROM table_name; AVG()  is an aggregate function that returns the average value for a numeric column. B