M('jj_sentiment')->field('*,count(*) as counts')->group('category')->select();
SELECT * , COUNT( * ) AS counts FROM jj_sentiment GROUP BY category ;db('jj_sentiment')->field('category,COUNT( * ) AS counts')->group('category')->SELECT(); 原语句select * ....... group by category 会出现问题
SELECT * , COUNT( * ) AS counts FROM jj_sentiment GROUP BY category ;db('jj_sentiment')->field('category,COUNT( * ) AS counts')->group('category')->SELECT();
原语句select * ....... group by category 会出现问题