ALTER TABLE table_name {ADD column_namedata_type |
ADD(column_namedata_type [, column_namedata_type]... ) |
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.
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