摘要:
完全描述:Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirement 阅读全文
摘要:
--统计数量 select count(*) from table; --统计某一列的数量(去空) select count(col) from table; --统计某一列的值大于或小于另一个值的数量(去不去空没试过) select count(CASE when t.column_name>0 then 'name' end) as new_name from table; 阅读全文