【python+mysql】mysql语句的执行，结果捕获，及如何在mysql语句中包含变量

python中执行mysql语句node 方法一：python cur.execute('select data from datanum where nodeid = %s and datatype = %s and ctime = %s', (nodeid, datatype, curctime)mysql 方法二：sql sql = "select ctime from datanum wh

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