After connecting to a DBEnvironment, you use queries to retrieve
data from database tables. A query is a statement in which you
describe the data you want to retrieve. In ALLBASE/SQL, a
query is performed by using the SELECT statement. For example:
SELECT PartName, SalesPrice
FROM PurchDB.Parts
WHERE PartNumber = '1123-P-01'
OR PartNumber = '1133-P-01'
|
The result of a query is called a query result. In the case of
the query above, which retrieves the name and selling price
of two parts from the table named PurchDB.Parts, the result is a
table made up of two columns and two rows:
-----------------------------------------
PARTNAME |SALESPRICE
------------------------------+----------
Central Processor | 500.00
Communication Processor | 200.00
|
A detailed presentation of queries and other forms of data manipulation
appears in the "SQL Queries" chapter.
