A DBcolumn group contains a column of data returned by an SQL SELECT statement.
A DBcolumn group contains a column of data returned by an SQL SELECT statement. This group is typically used in an array.
A DBcolumn group is a Data_Array object.
An integer value that indicates whether null data values are present. If it is 1, null values are present; if 0, null values are not present.
The value that represents a null data value. This value is determined from the datatype denoted by column_type and the null-value parameter associated with the query.
A string that represents the name of the column.
DBquery