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• The Oracle database software will transform recorded/stored data and statistics into useful pieces of information.. • Data: Each student’s test score is one
• An entity relationship diagram (ERD) is a consistent tool that can be used to represent the data requirements of a business regardless of the type of database that is used, and
– In other words, is this a mandatory or optional relationship for an employee.. • Must every job be assigned to
• The request is then sent to the Oracle Server (a database running on a computer), the request is processed and the data returned is displayed. SQL statement
• Use the correct syntax to select specific columns in a table, modify the way data is displayed, and perform calculations using arithmetic expressions and
• The IS NULL condition tests for unavailable, unassigned, or unknown data. • IS NOT NULL tests for data that is available in
It is mainly used to terminate the column, expression, or value to a specified number of decimal places. • When TRUNC is used, if the number of decimal places
CREATE or ALTER TABLE statement, the constraint is automatically enabled (enforced) by Oracle unless it is specifically created in a disabled state using the DISABLE
