structured query language (SQL) statements. • Contains a Oracle Database 10g is the database for grid . execute SQL statements and iSQL*Plus commands. Oracle Database PL/SQL User's Guide and Reference 10g Release 2 (). B Copyright © , , Oracle. .. Processing Queries with PL/SQL . Oracle Database SQL Language Reference, 11g Release 2 () . Oracle Database 11g Release 2 () New Features in the SQL.
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SQL Tutorial SQL TUTORIALS Done By: Osama Alkhoun n Computer & Programming Professional Solution ou (CPPS) kh Al Al-Balqa Applied. If you are willing to compile and execute SQL programs with Oracle 11g RDBMS but you in this tutorial, please notify us at [email protected] Oracle10g is the latest version of the Oracle. DBMS We believe Oracle10g is a giant step toward Auto Memory Management, Automatic SQL Tuning, Automatic .. Queries. Using 73 high-load queries from GFK, a market analysis company.
Table Employees: We have to perform a join. Tables in a database can be related to each other with keys. A primary key is a column with a unique value for each row. Each primary key value must be unique within the table. The purpose is to bind data together, across tables, without repeating all of the data in every table.
When you look at the example tables below, notice that: Example Who has ordered a product, and what did they order?
Name, Orders. If there are rows in Employees that do not have matches in Orders, those rows will not be listed. If there are rows in Employees that do not have matches in Orders, those rows also will be listed. If there had been any rows in Orders that did not O have matches in Employees, those rows also would have been listed.
Al Note: This command cannot be used to list all employees in Norway and USA. In the example above we have two employees with equal names, and only one of them is listed.
Example kh This example demonstrates how you can create a table named "Person", with four Al columns. The table below contains the most common data types in SQL: Data Type Description integer size Hold integers only. The maximum number of digits are specified in int size parenthesis.
The maximum number of digits are numeric size,d specified in "size".
The maximum number of digits to the right of n the decimal is specified in "d". The fixed size is specified in parenthesis.
The maximum size is specified in parenthesis. It is possible to create an index on one or more columns of a table, and each index is given a name. The users cannot see the indexes, they are just used to speed up queries.
Updating a table containing indexes takes more time than updating a table without, this is because the indexes also need an update. So, it is a good idea to create indexes only on columns that are often used for a search. A Unique Index n Creates a unique index on a table. A unique index means that two rows cannot have the same index value.
A Simple Index Al Creates a simple index on a table. The basic types of ou functions are: What is a View? 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. The database design and structure will NOT be affected by the functions, where, or ou join statements in a view. The database does not store the view data! By adding functions, joins, etc. The sample database Northwind has some views installed by default. The view is created with the following SQL: Note that this view select its data from another view called "Product Sales for ": Now we want to see the total sale only for the category "Beverages": The DBMS program enables you to extract, modify, or store information in a database.
Different DBMS programs provides different functions for querying data, reporting data, and modifying data. Print it, and fold it in your pocket.
Deletes the entire table!! You have learned how to execute queries, retrieve data, insert new records, delete records and update records in a database with SQL. Related Papers. After import, objects are added to your Relational Model, and the database ER diagram will be automatically created. If you would like to modify the appearance of the model just move objects on the pane.
Handling this case is a material for the next tutorial. Create smaller diagrams for large databases Data Modeler has an option called SubViews.
SubViews, as the name suggests, is part of the whole model. If you imported a lot of tables and views, you might want to break your diagram into smaller, more manageable diagrams. This is where SubViews come into play. I have added two tables to my SubView.
Objects which you moved to SubView are the same instance as an object in the Relational Model so you can edit comments in both Relational Model and any SubView. Comments in RDBMS - holds information imported from the database if you update this field you will be able to export descriptions back to your database - this is a material for another tutorial. This field has not limited length but if you exceed characters and will try to save descriptions back to the database the script will throw an error.
Comments - holds descriptions which are saved only in the design file you are working with at this very moment. Notes - are used to add additional information, and they will not be included in the exported documentation.
Export includes only one description field - by default, it is Comments field. When using Comments in RDBMS keep in mind that you should not insert text longer than characters as it will cause an error. Unfortunately the tool doesn't cant handle it properly nor tells you that you exceeded this length.
Once you have added a description for a table, it is time to describe columns. To see a list of columns select Columns on the left menu. You choose columns in the middle pane on the Details tab and provide descriptions of the text fields on the right pane.
Or from Overview tab. Comment as many elements as you need. When you finish with the table close it with OK button. Note that your changes in your model file are not saved yet. After you modify table descriptions, they will be highlighted in a browser window in red. Save the file to keep your changes, if you close Oracle SQL Developer Data Modeler without saving it, you will lose all the changes made. When you finish documenting your database, you are ready to export the documentation.
I will describe how to do it in another article. Try all types of exports to see which one suit you best. And configure export.
Most important options which you need to set are: Available Reports - When you generate documentation from the Relational Model, you can choose Tables or Table Views. Other is used to generate documentation of other models available in SQL Developer Data Modeler like Logical Model, but this is not part of this tutorial. Tables - only tables and diagrams will be included in the documentation.
Table Views — only views and diagrams will be included. You might also have a look at other options: Report Title — title visible in the documentation. Report File Name — name of the file with documentation. The selected checkboxes on the picture above are for you to decide if you want to show diagrams in your documentation and if you would like to page break between objects.
Advanced options - documentation scope If you want to export all objects imported from the database and diagrams just skip this section.