The Text driver supports the Alter Table statement to add one or more columns to a table or to delete (drop) a single column.DROP[COLUMN] column_name}table_name is the name of the table to which you are adding or dropping columns.column_name assigns a name to the column you are adding or specifies the column you are dropping.data_type specifies the native data type of each column you add.You cannot add columns and drop columns in a single statement, and you can drop only one column at a time. For example, to drop a column:The Alter Table statement fails when you attempt to drop a column upon which other objects, such as indexes or views, are dependent.