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merge into table_c c using table_m m on(c.username = m.username) when matched then update set c.userId = m.id; ------将table_m中的id字段设置到table_c中userId字段
spool /tmp/insert2.log; ----设置执行日志文件
spool off; ------关闭日志
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原文地址:http://www.cnblogs.com/zhonghan/p/4522542.html