SAS Code for DB2 Database Table Creation

Code Explanation

The provided code snippet is written in SAS (Statistical Analysis System) and utilizes PROC SQL to interact with a DB2 database. The goal of the script is to create a new table in the SAS environment by copying data from an existing table in the DB2 database.

Code Breakdown

1. PROC SQL Statement

   Proc sql;

   • This initializes the SQL procedure in SAS, allowing for SQL queries to be executed.

2. Connect to DB2 Database

   Connect to db2(datasrc=DB2PRODA authdomain=DB2Auth);

   • Connect to db2: Establishes a connection to the DB2 database.
   • datasrc=DB2PRODA: Specifies the data source using an alias, here DB2PRODA.
   • authdomain=DB2Auth: Indicates the authentication domain for the connection credentials.

3. Create a New Table in SAS

   Create table state_copy3 as 
   select * from connection to db2
   (Select * from db2.state with ur);

   • Create table state_copy3 as: Creates a new table called state_copy3 in the SAS environment.
   • select * from connection to db2: Executes a query on the connected DB2 database.
   • (Select * from db2.state with ur): The subquery inside parentheses selects all columns (*) from the state table located in the db2 schema, using with ur for "Uncommitted Read" operation which allows the query to read uncommitted changes.

4. Quit the SQL Procedure

   Quit;

   • This terminates the SQL procedure.

Key Concepts

• PROC SQL: A SAS procedure that enables the execution of SQL queries within SAS.
• DB2 Database Connection: Connecting to a DB2 database to fetch or manipulate data.
• Table Creation: The process of creating a new table in SAS by selecting data from an external database.
• Uncommitted Read (UR): A read operation that does not wait for transactions to commit, potentially reading uncommitted changes.

Additional Example

To illustrate a similar process but using a different database, consider connecting to an Oracle database instead of DB2:

Proc sql;
Connect to oracle(user=myuser password=mypass path='myoracledb');
Create table state_copy3 as 
select * from connection to oracle
(Select * from oracle.state);
Quit;

This example demonstrates how to adapt the same structure to another SQL-compliant database system, in this case, Oracle.

Summary

The code snippet demonstrates how to connect to a DB2 database, select data from an existing table, and create a new table in the SAS environment containing the data retrieved. Each step has specific purposes, from initiating the SQL procedure, establishing a database connection, fetching the data, to finally terminating the procedure. Understanding these fundamental components and their interplay is essential for effectively managing data across different databases within SAS. For a more comprehensive understanding and deeper expertise, consider exploring further learning modules available on the Enterprise DNA Platform.