mysql 创建索引和删除索引

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

　　

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原文地址：https://www.cnblogs.com/qianjinyan/p/12483875.html