SHOW INDEX FROM tm_show.tm_order; SHOW CREATE TABLE tm_show.tm_order; CREATE UNIQUE INDEX qianjinyan4ceshi ON tm_show.tm_order (orderNUmber); DROP INDEX qianjinyan4ceshi ON tm_show.tm_order
mysql 创建索引和删除索引
原文：https://www.cnblogs.com/qianjinyan/p/12483875.html
