摘要: select sum( case when a is nul then 1 end),sum( case when b is nul then 1 end),sum( case when c is nul then 1 end)from table1 ; select 'a' 字段,sum( cas 阅读全文
posted @ 2021-01-20 13:41 rjm123456 阅读(1381) 评论(0) 推荐(0) 编辑