SQL
SQL stands for Structured Query Language. It is used for storing and managing data in
relational database management system (RDMS).
It is a standard language for Relational Database System. It enables a user to create,
read, update and delete relational databases and tables.
All the RDBMS like MySQL, Informix, Oracle, MS Access and SQL Server use SQL as
their standard database language.
SQL allows users to query the database in a number of ways, using English-like
statements.
Rules:
SQL follows the following rules:
Structure query language is not case sensitive. Generally, keywords of SQL are
written in uppercase.
Statements of SQL are dependent on text lines. We can use a single SQL statement
on one or multiple text line.
Using the SQL statements, you can perform most of the actions in a database.
SQL depends on tuple relational calculus and relational algebra.
SQL process:
When an SQL command is executing for any RDBMS, then the system figure out the
best way to carry out the request and the SQL engine determines that how to
interpret the task.
In the process, various components are included. These components can be
optimization Engine, Query engine, Query dispatcher, classic, etc.
All the non-SQL queries are handled by the classic query engine, but SQL query
engine won't handle logical files.
, Characteristics of SQL
SQL is easy to learn.
SQL is used to access data from relational database management systems.
SQL can execute queries against the database.
SQL is used to describe the data.
SQL is used to define the data in the database and manipulate it when needed.
SQL is used to create and drop the database and table.
SQL is used to create a view, stored procedure, function in a database.
SQL allows users to set permissions on tables, procedures, and views.
Advantages of SQL
There are the following advantages of SQL:
High speed
Using the SQL queries, the user can quickly and efficiently retrieve a large amount of
records from a database.
No coding needed
In the standard SQL, it is very easy to manage the database system. It doesn't require
a substantial amount of code to manage the database system.
Well defined standards
Long established are used by the SQL databases that are being used by ISO and ANSI.
SQL stands for Structured Query Language. It is used for storing and managing data in
relational database management system (RDMS).
It is a standard language for Relational Database System. It enables a user to create,
read, update and delete relational databases and tables.
All the RDBMS like MySQL, Informix, Oracle, MS Access and SQL Server use SQL as
their standard database language.
SQL allows users to query the database in a number of ways, using English-like
statements.
Rules:
SQL follows the following rules:
Structure query language is not case sensitive. Generally, keywords of SQL are
written in uppercase.
Statements of SQL are dependent on text lines. We can use a single SQL statement
on one or multiple text line.
Using the SQL statements, you can perform most of the actions in a database.
SQL depends on tuple relational calculus and relational algebra.
SQL process:
When an SQL command is executing for any RDBMS, then the system figure out the
best way to carry out the request and the SQL engine determines that how to
interpret the task.
In the process, various components are included. These components can be
optimization Engine, Query engine, Query dispatcher, classic, etc.
All the non-SQL queries are handled by the classic query engine, but SQL query
engine won't handle logical files.
, Characteristics of SQL
SQL is easy to learn.
SQL is used to access data from relational database management systems.
SQL can execute queries against the database.
SQL is used to describe the data.
SQL is used to define the data in the database and manipulate it when needed.
SQL is used to create and drop the database and table.
SQL is used to create a view, stored procedure, function in a database.
SQL allows users to set permissions on tables, procedures, and views.
Advantages of SQL
There are the following advantages of SQL:
High speed
Using the SQL queries, the user can quickly and efficiently retrieve a large amount of
records from a database.
No coding needed
In the standard SQL, it is very easy to manage the database system. It doesn't require
a substantial amount of code to manage the database system.
Well defined standards
Long established are used by the SQL databases that are being used by ISO and ANSI.
