myql 關鍵字after表示在某列的後面增長一列。html
示例入下code
USE database1 ALTER TABLE table1 ADD COLUMN `col_a` text COLLATE utf8_bin AFTER `col_x`, ADD COLUMN `col_b` text COLLATE utf8_bin AFTER `col_a` ADD COLUMN `col_c` text COLLATE utf8_bin AFTER `col_b`