J. Notes for Users of QUEL : QUEL Notes for the Writing 4GL Statements Chapter : Database Access Statements
 
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Database Access Statements
In 4GL, you use these QUEL statements to query the database:
The Retrieve Statement
Using Append to Add Data to Database Tables
Using Replace to Change a Database Row
Deleting Database Rows
These statements enable you to retrieve data, append rows to tables, update rows in tables, and delete information that is no longer needed.