MS Sql Server: Creating A Database
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The document discusses the steps to create a SQL Server database. It begins by explaining the need to understand the essential data elements and structure of the database. Next, it describes how to create the database schema using SQL commands in the SQL Server Command Prompt. Example commands are provided to create a table for a grocery item database with fields for item ID, name, cost, and date of purchase. Finally, it notes that running the "GO" command executes the SQL statement to create the database structure.
MS Sql Server: Creating A Database
- 1. 3SQL SERVER: CREATINGA DATABASE
- 2. Creating a SQL Server DatabaseSTEPS IN CREATING A DATABASE IN 3 SIMPLE STEPS Understand the problem. Think of the essential data elements which are to become a part of the database Create the database using the SQL server 2008 – Command Prompt Feed data into the databaseLets take a look at how this can be done
- 3. Step 1: Understand the problemAnalyze the problem and abstract the essential details that are to be storedFor example, if you wish to construct a database of the grocery items that are to be bought, the essential facts would be: Name of the item
- 4. Type of the Item
- 5. CostWe need not bother about the ‘less’ significant data like ISI certificate number or the Ingredients from a daily-user’s perspectiveBottom-line: Take the important stuff, ignore the rest.
- 6. Step 2: Create the databaseThe Next step is to create the database schema. The schema (pronounced as skee-ma) is the structure of the database, which is described in a DBMS language like SQL.For the Grocery-Database, the schema of a table of items may look like:The Item number is a key, i.e., it is used to uniquely locate a product in a database.
- 7. Step 2: Create the databaseSearching a DB Without a Primary Key: NOT EFFICIENTComputer: Now which out of these do you need?User: Search for ‘Milk’Database is searched and 2 entries match
- 8. Step 2: Create the databaseSearching a DB witha Primary Key: EFFICIENTComputer: I got it! User: Search for Item with ID 102Database is searched and 1 entry matchesDB With a Primary KeyHence, always include primary keys in your DB deign
- 9. Step 2: Create the databaseCreating the DB using SQL Server 2008 – Command Prompt
- 10. Step 2: Create the databaseThe SQL Language consists of 3 major subsets, based on the nature of the commands:
- 11. Step 2: Create the databaseThe SQL command for database creation falls under the DDL Language as it lets the user ‘define’ the database structure1.Open the SQL Server Command Prompt: Open Command Prompt: Click on START-> RUN-> Type ‘cmd’Activate SQL Command PromptType ‘sqlcmd’ in the command prompt that was opened
- 12. Step 2: Create the database2.Type the Command The Syntax of the table-creation command is:create table <table-name> ( <fieldNamefieldTpye>,…);The Common Attributes/Fields types are:Number
- 13. Eg: Product ID: 2324234
- 14. Float (decimals)
- 15. Eg: CGPA: 9.23
- 17. It stands for ‘Variable length Character’
- 19. Date:
- 21. Step 2: Create the databaseFor example, consider a Grocery Item database:Field Type: NumberField Type: StringField Type: Float (Decimal)Field Type: DateSo, command for creation would be: create table itemlist (ItemID number, ItemName varchar2(15), cost float, dataofpurchase date);NOTE: Dont worry about the ‘case’ of the field-names. SQL is case insensitive.
- 22. Step 2: Create the database3. Runthe Command In the SQL Command prompt, after typing the command:create table <table-name> ( <fieldNamefieldTpye>,…);1>Type ‘GO’ and press ENTER to run the SQL Server command:1> create table <table-name> ( <fieldNamefieldTpye>,…);2> go
- 23. Summary3. Creating a Database: Analyze the scenario and decide on the structure