sql语句 case when or 自己写的sqlselect date_format(createDate,'%Y-%m-%d') as createDate,count(case when reqtype='runUp' then imei end) as runUp,count(case when (reqtype='login' or reqtype='register') then imei end) as loginFROM (select distinct

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sql语句 case when or 自己写的sqlselect date_format(createDate,'%Y-%m-%d') as createDate,count(case when reqtype='runUp' then imei end) as runUp,count(case when (reqtype='login' or reqtype='register') then imei end) as loginFROM (select distinct
sql语句 case when or
自己写的sql
select date_format(createDate,'%Y-%m-%d') as createDate,
count(case when reqtype='runUp' then imei end) as runUp,
count(case when (reqtype='login' or reqtype='register') then imei end) as login
FROM (select distinct imei,date_format(createDate,'%Y-%m-%d') as createDate,reqtype
from stat_user_loginreq_201312 where 1=1 and DATE_FORMAT(createDate,'%Y-%m-%d') = '2013-12-01'
) AS g group by DATE_FORMAT(createDate,'%Y-%m-%d') order by createDate
查出来的count（case when (reqtype='login' or reqtype='register') then imei end）的值和
select COUNT(distinct imei),date_format(createDate,'%Y-%m-%d') from stat_user_loginreq_201312 where 1=1
and (reqtype='login' or reqtype='register')
and DATE_FORMAT(createDate,'%Y-%m-%d') = '2013-12-01'
group by DATE_FORMAT(createDate,'%Y-%m-%d') order by createDate
查出来的不一样

sql语句 case when or 自己写的sqlselect date_format(createDate,'%Y-%m-%d') as createDate,count(case when reqtype='runUp' then imei end) as runUp,count(case when (reqtype='login' or reqtype='register') then imei end) as loginFROM (select distinct
count（case when (reqtype='login' or reqtype='register') then imei end）是计数reqtype='login' 和reqtype='register'的数量；
COUNT(distinct imei),　是当reqtype='login' 和reqtype='register'时去重计数imei的数量．

sql语句 case when or 自己写的sqlselect date_format(createDate,'%Y-%m-%d') as createDate,count(case when reqtype='runUp' then imei end) as runUp,count(case when (reqtype='login' or reqtype='register') then imei end) as loginFROM (select distinct sql case when请教请教sql中case when 判断语句select 姓名,工龄,(case when (工龄>= '35') then 90%when (工龄>='30' and 工龄='20' and 工龄='10' and 工龄 SQL语句case whenselect trunc(date '2009-01-01','dd') as date_id, b.org_id as org_id, b.risk_id as risk_id, sum(a.planfee-nvl(c.payreffee,0)) , (case when to_char(statistic_date-payrefdate>=0) and to_char(st SQL server中哪些语句中运用逻辑表达式?请回答除了：where ,if（else if）,while,case when..then..,having,on越多越好,最好能有简单例子. sql case when then ...虚心求教select case salarywhen 5000 then '高薪'when 4500 then '中薪'when 3500 then '中低薪'else 'null'end as '工资等级' from telenolist我想统计各个工资级别的人数 那个count(*)应该放在语句的哪 sql语句 where 编码 like '%[*]%' or 名称 like '[*]%' or 简码 like '%[*]%'其中'%[*]%的含义是什么 vhdl 并行语句进程语句,case语句,元件例化语句,when.else语句,哪个不是并行语句 sql语句 decimal(18, case when 语句怎么写,举个例子 能否在from 之后加 case when 语句? 能不能在Where 后面用Case when 语句 case when语句结尾用end 还是end casePL SQLend 和 end case有什么区别? SQL中WHERE 表名 LIKE 'CHEF%'OR UP>$70这句语句意思是什么,其中LIKE与OR用法 sql语句中DISTINCT是什么意思 integer是什么意思?SQL语句中 if (pastart = -1) sql.append(select * from(); sql.append(select nid,sname,sdescription,nprice,sif (pastart = -1)sql.append(select * from();sql.append(select nid,sname,sdescription,nprice,simg,(CASE smctag WHEN '0' THEN '有货'WHEN '1' THEN ' SQL语句中的（；）分号是什么意思? SQL中begin end 怎么用着条语句?