SELECT id,field1,COUNT(field2) as total
FROM table_name
GROUP BY field1
HAVING total > 1
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ngx_http_limit_conn_module
使用版本 - CentOS Linux release 7.5.1804 (Core) - nginx/1.12.2版本 - curl 7.61.0 (x86_64-pc-linux-gnu) libcurl/7.61.0 OpenSSL/1.0.2k ...
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