MySQL查询某个列中相同值的数量统计_MySQL
- WBOYOriginal
- 2016-06-01 12:59:31991browse
数据现在是这样的，我想确定出type列中的news和image。。。。甚至以后有其他值，他们分别有多少个。
SELECT type, count(1) AS counts FROM material GROUP BY type
count(1),代表统计第一列，写上1 比写 *的效率高！
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