| A | B |
| case sensitive | a noted difference between big (capitalized) and small letters. |
| ESCAPE | this option identifies the escape characters; which causes the server to interpret the character literally. |
| readability | code that can be easily read. |
| IS NULL | condition tests for null values. |
| WHERE clause | restricts the rows returned by a select statement. |
| comparison conditions | compares one expression to another value or expression. |
| BETWEEN | displays rows based on a range of values. |
| inclusive | including the specified limits and the area between them: the numbers one to ten, inclusive. |
| LIKE | selects rows that match a character pattern. |
| IN | tests for values in a specified list of values. |
| DISTINCT | a command that suppresses duplicates. |
| concatenation | links two columns together to form one character data column. |
| default | a particular value for a variable that is assigned automatically by an operating system and remains in effect unless overridden by the operator. |
| string | group of character data. |
| DESCRIBE (DESC)_ | a iSQL*Plus command to display the structure of a table. |