A __________ contains all the information about the data analysis including entities, attributes, and tables.
"A CHAR column can be converted to a VARCHAR2 column and vice-versa even if the column contains non-NULL values, provided its size does not change."
Which of the following statements is used to search data when the users do not have the exact or complete text for a column?
Which of the following special characters is used to query all the columns from a table without listing each column by name?