参考链接:https://www.cnblogs.com/kuang17/p/15647129.html
建立索引方法:
#1. collate "C"
create index idx_test_like_name_c on test_like (name collate "C");
#2. 操作符类varchar_pattern_ops方式
create index idx_test_like_name_ops on test_like (name varchar_pattern_ops);
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