添加单列 ALTER TABLE tbl_name ADD [COLUMN] col_name column_definition [FIRST | AFTER col_name] ALTER TABLE tbl_name DROP [COLUMN] col_name
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添加单列 ALTER TABLE tbl_name ADD [COLUMN] col_name column_definition [FIRST | AFTER col_name] ALTER TABLE tbl_name DROP [COLUMN] col_name
2014-07-18
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