WGU C175/D426 DATA MANAGEMENT FOUNDATIONS OA EXAM -with ALL QUESTION AND CORRECT ANSWER GRADED A+ When executing a SELECT query, the database examines the WHERE clause and estimates hit ratio. If hit ratio is high, a table scan is performed. If hit rat

WGU C175/D426 DATA MANAGEMENT FOUNDATIONS OA EXAM -with ALL QUESTION AND CORRECT ANSWER GRADED A+ When executing a SELECT query, the database examines the WHERE clause and estimates hit ratio. If hit ratio is high, a table scan is performed. If hit ratio is low, the query needs only a few table blocks, making a table scan inefficient. - -When to Use Table Scan Implements database requirements in a specific system. Converts entities, relationships, and attributes into tables, keys, and columns. Also known as schema. - -Logical Design Adds indexes and specifies table organization on storage media. Affects query processing speed but not query results. - -Physical Design Physical design does not affect query results. - -Data Independence Library of procedures/classes linking a programming language to a database. Simplifies SQL usage. - -API (Application Programming Interface) A text interface included in the MySQL Server download. - - MySQL Command-Line Client