SQL !
SQL is a standard computer language for accessing and manipulating databases. Abbreviation of structured query language, and pronounced either see-kwell or as separate letters. SQL is a standardized query language for requesting information from a database. The original version called SEQUEL (structured English query language) was designed by an IBM research center in 1974 and 1975. SQL was first introduced as a commercial database system in 1979 by Oracle Corporation.
SQL Database Tables
A database most often contains one or more tables. Each table is identified by a name (e.g. "Customers" or "Orders"). Tables contain records (rows) with data.
SQL Queries
With SQL, we can query a database and have a result set returned. The most common operation in SQL databases is the query, which is performed with the declarative SELECT keyword. SELECT retrieves data from a specified table, or multiple related tables, in a database.
Comment in SQL
ANSI-standard SQL supports double dash, --, as a single line comment identifier (some extensions also support curly brackets or C style /* comments */ for multi-line comments).
