旅游网站源代码模板,谈谈自己对市场营销的理解,福州企业网站,档案网站建设经验背景 想获取if_yc为1连续账期数据 思路 获取所有if_yc为1的账期数据下一行减去上一行账期#xff0c;如果为1则为连续#xff0c;不等于1就为断档获取不等于1的最小账期#xff0c;就是离当前账期最近连续账期 代码 以下为mysql语法#xff1a; select acct_month f…背景 想获取if_yc为1连续账期数据 思路 获取所有if_yc为1的账期数据下一行减去上一行账期如果为1则为连续不等于1就为断档获取不等于1的最小账期就是离当前账期最近连续账期 代码 以下为mysql语法 select acct_month from( select (m:m1) rn,acct_month from( select 202311 acct_month,1 if_yc union all select 202310,1 union all select 202309,1 union all select 202308,0 union all select 202307,1 union all select 202306,1) a,(select m:0) b where if_yc 1 order by acct_month desc ) m , (select min(t1.rn)1 rn1-- ,t1.acct_month-t2.acct_month from ( select (i:i1) rn,acct_month from( select 202311 acct_month,1 if_yc union all select 202310,1 union all select 202309,1 union all select 202308,0 union all select 202307,1 union all select 202306,1) a,(select i:0) b where if_yc 1 order by acct_month desc ) t1 , ( select (j:j1) rn,acct_month from( select 202311 acct_month,1 if_yc union all select 202310,1 union all select 202309,1 union all select 202308,0 union all select 202307,1 union all select 202306,1) a,(select j:-1) b where if_yc 1 order by acct_month desc ) t2 where t1.rn t2.rn and t1.acct_month-t2.acct_month 1 ) n where rn n.rn1