View index: SHOW INDEX FROM table name
remove the index: ALTER TABLE `table` drop index `idx_phone_no`
add indexes: ALTER TABLE` table `ADD INDEX` idx_phone_no` ( `PHONE_NO` ASC) COMMENT ''; (PHONE_NO for the field name, idx_phone_no the index aliases)
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Origin www.cnblogs.com/sikuaiwu/p/11323538.html
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