The Relational Component

The relational component (or relation) includes several abbreviations that correspond to a series of relational operators that are used when comparing the values of two fields, as follows:

·    LT (less than) checks if the value of a first-named field is less than that of a second field.

·    GT (greater than) checks if the value of a first-named field is greater than a second field.

·    LE (less than or equal to) checks if the value of a first-named field is less than or equal to a second field.

·    GE (greater than or equal to) checks if the value of a first-named field is greater than or equal to a second field.

·    EQ (equal to) checks if the value of a first-named field is equal to that of a second field.

·    NE (not equal to) checks if the value of a first-named field is not equal to that of a second field.

·    IN (includes) checks if a specified character string is included within the value of a field. For example, you could check to see if the letter string NOR is included in the CUSTOMER NAME field.

·    EX (excludes) checks if a specified character string is excluded from the value of a field. For example, you could check to see if the letter string NOR does not exist in the CUSTOMER NAME field.