Stored Procedure in SQL

This article I will give you some basic syntax about stored procedure in SQL.

Stored Procedure:

Stored Procedure is the prepared SQL codes that we can save, so the code can be reused over and over again.

It is suitable for some SQL queries we need to use frequently.

There are three kinds of stored procedure:

  • No parameter
  • One parameter
  • multiple parameters

Stored Procedure (No parameter) Syntax

CREATE PROCEDURE procedure_name
AS
sql_statement
GO
EXEC procedure_name

Stored Procedure (One parameter) Syntax

CREATE PROCEDURE [dbo].[oneparameter]
@ProductCatergoryID int
AS
SELECT *FROM Production.ProductCategoryID
GO
EXEC oneparameter @ProductCatergoryID = '4'

Stored Procedure (multiparameter) Syntax

CREATE PROCEDURE [dbo].[multiparameter]
@ProductCategoryID int, @Name varchar(50)
AS
SELECT *FROM Production.ProductCategory pc
WHERE pc.ProductCategoryID = @ProductCategoryID and pc.Name = @Name
GO
EXEC multiparameter @ProductCategoryID = '4', @Name = 'Accessories'

I will record all knowledge I touch in my Business Intelligence journey.

Next blog will be around Data Warehouse.

If you are interested in or have any problems with Business Intelligence, feel free to contact me .

Or you can connect with me through my LinkedIn.

Some Cheat Sheets about Business Intelligence

There are several parts of my Business Intelligence journey.

So I write this blog for recording some cheat sheets.

Installation:

Firstly, some tools need to be installed on the laptop.

All of them are Microsoft softwares, so I prepare a surface laptop 2.

  • SQL Server 2016 Developer Edition: Seclect the features we need to install, such as SQL Server Integration Services(SSIS), SQL Server Analysis Services(SSAS) and SQL Server Reporting Services(SSRS).
  • SQL Server Management Studio(SSMS)
  • SQL Server Data Tools(SSDT)
  • Report Builder

What is Business Intelligence(BI)?

I have mentioned it in the previous blog. It is to transform raw data into meaningful information for analysis.

BI Process:

  • Import data from different data sources
  • Produce reports or graghs through SSIS, SSAS and SSRS
  • Make business decisions

Some terms:

ETL: Extraction, Transformation and Loading

OLTP: Online Transaction Processing

Cube: Multi-dimensional data structure built using dimensions and facts, using MDX (Multi dimensional expression) language

SQL and Relational Database: which I have mentioned them in the previous blog

Primary Key: A single attribute or an unique id in a Relational Database

Foreign Key: A set of attributes that references a candidate key in a Relational Database

Some differences:

Traditional Normalized Database VS Data Warehouse: Formal one has no duplicate data but latter one has duplicate data for efficiency.

Null VS Blank(where clause): For null, the clause is where xxxxx is null; For blank, the clause is where xxxxx is ”

Delete VS truncate: truncate table xxxxx ->no rollback&faster; delete from xxxxx -> rollback

SQL Language:

Learning sources:

Some common commands:

One table:

SELECT…FROM

WHERE CLAUSE

ORDER BY CLAUSE

Two tables:

Inner Join

Other Joins, e.g., LEFT OUTER JOIN

GROUP BY

If you are interested in or have any problems with Business Intellgence, feel free to contact me .

Or you can connect with me through my LinkedIn.