Sql views, stored procedure, functions
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This document discusses views, stored procedures, and functions in SQL. Views are virtual tables based on the result set of a SQL statement that contain rows and columns like real tables. Stored procedures allow reusable SQL code to be saved and can accept parameters. Functions extend MySQL with new functions that work like built-in functions and have parameters and return data types.
![CREATE
& CALL
CREATE VIEW view_name AS
SELECT column1, column2, ...
FROM table_name
WHERE condition;
SELECT * FROM [view_name];](https://image.slidesharecdn.com/sqlviewsspfx-200304182538/85/Sql-views-stored-procedure-functions-3-320.jpg)
![CREATE
& CALL
CREATE FUNCTION
function_name(param param_data_type)
RETURNS data_type
BEGIN
function_statement
END;
SELECT function_name([column_name]) FROM
[table_name];](https://image.slidesharecdn.com/sqlviewsspfx-200304182538/85/Sql-views-stored-procedure-functions-9-320.jpg)
Sql views, stored procedure, functions
- 1. SQL -Views, SP, Fx 5/03/2020- - by OmVikramThapa
- 2. Views In DB, a view is a virtual table based on the result-set of an SQL statement. A view contains rows and columns, just like a real table. The fields in a view are fields from one or more real tables in the database.
- 3. CREATE & CALL CREATE VIEW view_name AS SELECT column1, column2, ... FROM table_name WHERE condition; SELECT * FROM [view_name];
- 4. SAMPLE DEMO
- 5. STORED PROCEDURE A stored procedure is a prepared SQL code that you can save, so the code can be reused over and over again. You can also pass parameters to a stored procedure, so that the stored procedure can act based on the parameter value(s) that is passed.
- 6. CREATE & CALL CREATE PROCEDURE procedure_name BEGIN sql_statement END; EXEC procedure_name; OR CALL procedure_name;
- 7. SAMPLE DEMO
- 8. FUNCTIONS SQL Functions are a way to extend MySQL with a new function that works like a native (built-in) function such as NOW() or CONCAT() Functions will have the params with datatype and always return a value with return datatype too. These are also called as UDF (User Defined Functions)
- 9. CREATE & CALL CREATE FUNCTION function_name(param param_data_type) RETURNS data_type BEGIN function_statement END; SELECT function_name([column_name]) FROM [table_name];
- 10. SAMPLE DEMO
- 11. TAKEAWAY 1) VIEWS 2) STORED FUNCTIONS 3) FUNCTIONS