select sum(if(color='blue',1,0)) as blue,sum(if(color='red',1,0)) as red from ys;
select count(color='blue' or null) as blue,count(color='red' or null) as red from ys;
mb61273498c4ce2 博主文章分类:mysql2 ©著作权
select sum(if(color='blue',1,0)) as blue,sum(if(color='red',1,0)) as red from ys;
select count(color='blue' or null) as blue,count(color='red' or null) as red from ys;
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