WGU D467 EXPLORING DATA
COMPREHENSIVE EXAM 2026 STUDY
GUIDE QUESTIONS AND SOLUTIONS
◉ (*)
Answer: Includes all columns from a table.
◉ SQL dialects
Answer: Slightly different variations of SQL used by different
vendors of SQL databases.
◉ Single quotes
Answer: A general rule across almost all SQL dialects is to use single
quotes for strings.
◉ CamelCase capitalization
Answer: Capitalize the start of each word, like a two-humped
(Bactrian) camel.
◉ nake_case
Answer: A naming convention for columns where words are
separated by underscores and all letters are lowercase.
, ◉ Indentation
Answer: A general rule to keep the length of each line in a query <=
100 characters for readability.
◉ Multi-line comments
Answer: Use /* to start the comment and */ to close the comment.
◉ Comments in SQL
Answer: Use comments in the query to remind yourself of what you
are trying to do.
◉ Sorting order
Answer: Data can be sorted in ascending or descending order, and
alphabetically or numerically.
◉ SQL query structure
Answer: It is always a good idea to use all caps for clause starters
(e.g. SELECT, FROM, WHERE, etc.).
◉ Case sensitivity in SQL
Answer: Some SQL dialects are case sensitive.
COMPREHENSIVE EXAM 2026 STUDY
GUIDE QUESTIONS AND SOLUTIONS
◉ (*)
Answer: Includes all columns from a table.
◉ SQL dialects
Answer: Slightly different variations of SQL used by different
vendors of SQL databases.
◉ Single quotes
Answer: A general rule across almost all SQL dialects is to use single
quotes for strings.
◉ CamelCase capitalization
Answer: Capitalize the start of each word, like a two-humped
(Bactrian) camel.
◉ nake_case
Answer: A naming convention for columns where words are
separated by underscores and all letters are lowercase.
, ◉ Indentation
Answer: A general rule to keep the length of each line in a query <=
100 characters for readability.
◉ Multi-line comments
Answer: Use /* to start the comment and */ to close the comment.
◉ Comments in SQL
Answer: Use comments in the query to remind yourself of what you
are trying to do.
◉ Sorting order
Answer: Data can be sorted in ascending or descending order, and
alphabetically or numerically.
◉ SQL query structure
Answer: It is always a good idea to use all caps for clause starters
(e.g. SELECT, FROM, WHERE, etc.).
◉ Case sensitivity in SQL
Answer: Some SQL dialects are case sensitive.
