필드 속성 변경하는법... 채택완료

아래 문법을 사용하시면 됩니다.< br> < br> ALTER [IGNORE] TABLE tbl_name alter_spec [, alter_spec ...]< br> < br> alter_specification:< br>         ADD [COLUMN] create_definition [FIRST | AFTER column_name ]< br>   or    ADD [COLUMN] (create_definition, create_definition,...)< br>   or    ADD INDEX [index_name] (index_col_name,...)< br>   or    ADD PRIMARY KEY (index_col_name,...)< br>   or    ADD UNIQUE [index_name] (index_col_name,...)< br>   or    ADD FULLTEXT [index_name] (index_col_name,...)< br>   or ADD [CONSTRAINT symbol] FOREIGN KEY index_name (index_col_name,...)< br>             [reference_definition]< br>   or    ALTER [COLUMN] col_name {SET DEFAULT literal | DROP DEFAULT}< br>   or    CHANGE [COLUMN] old_col_name create_definition< br>   or    MODIFY [COLUMN] create_definition< br>   or    DROP [COLUMN] col_name< br>   or    DROP PRIMARY KEY< br>   or    DROP INDEX index_name< br>   or    RENAME [TO] new_tbl_name< br>   or    ORDER BY col< br>   or    table_options< br> < br>