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• In order to accurately collect this data, a business must create a conceptual model of the data it considers important.. Copyright © 2015, Oracle and/or
• This lesson will help you complete your model - you may need to create new entities or new relationships based on the business needs?. • It will also help you define the scope
• During the client interview, and while writing the business scenarios and rules, look for keywords like:.. – VIEW, REPORT, BRING UP, PRINT, FIND, READ, &
• In SQL, the concatenation operator can link columns to other columns, arithmetic expressions, or constant values to create a character expression.. • The concatenation operator
• Select and apply character-manipulation functions CONCAT, SUBSTR, LENGTH, INSTR, LPAD, RPAD, TRIM, and REPLACE in a SQL query.. • Write flexible queries using
the WHERE clause or the join condition is invalid, the Oracle Server returns the Cartesian product of the two tables. • This is a combination of each row of one table with
creation statement, the Oracle database will create a Check Constraint in the database to enforce a value in the NOT NULL column. • This constraint creation can be almost invisible
• NEXTVAL must be used to generate a sequence number in the current user's session before CURRVAL can be referenced.. • You must qualify CURRVAL with the
