The name of the alias defined for the column in the query or null if none is defined.
Column Name
The name of the column in the table or null if this is a synthetic column which is the result of some SQL expression.
Description
A human readable description of the property contained in this column or null if this is a synthetic column which is the result of some SQL expression.
Precision
The precision (maximal number of digits) for decimal data types, otherwise 0.
Referenced Table
The name of the referenced table if this column represents a foreign-key relation to the IDs of another table, otherwise null.
Scale
The scale (maximal number number of digits in the fractional part) in case of a decimal data type, otherwise 0.