-- Calculate a sum based on time periods in CASE statement SELECT [U_CHAINNAME] AS 'CHAIN NAME', DMDUNIT, MIN(DMDPostDate) AS 'DMDPostDate', CASE WHEN MIN(DMDPostDate) BETWEEN MIN(DMDPostDate) AND DATEADD(DAY, +56,DATEDIFF(DAY,0,MIN(DMDPostDate))) THEN SUM([HistoryQuantity]) END AS...
这里不是编辑我的原始答案(我留下它作为羞耻的标记)，而是一个新的答案，基于您的原始代码片段。如果您...
而我只想统计那些正值的qty,加上if function就可以了。 SQL为: select sum(if(qty > 0, qty, 0)) as total_qty from inventory_product group by product_id 意思是如果qty > 0, 将qty的值累加到total_qty, 否则将0累加到total_qty. 以下是sum(if())的例子: 1 2 3 4 5 select sum(if( qty >...
bool CC_Database::checkNullQuery(string query)sqlite3_stmt *statement;{ cout << " 浏览5提问于2013-06-29得票数 1 回答已采纳 2回答 当我向没有结果的查询添加聚合函数时,我得到一个空行 、、 当我向SQL查询添加聚合函数时,我得到一行返回的空值。如果我去掉聚合函数,我不会得到任何返回的行。为什么会...
NULLIF_FUNC , CASE_FUNC , YEAR_FUNC , YEARWEEK_FUNC , MAKEDATE_FUNC , MAKETIME_FUNC , MONTH_FUNC , MONTHNAME_FUNC , DAY_FUNC , DAYNAME_FUNC , TO_DAYS_FUNC , TO_SECONDS_FUNC , DATE_FUNC , HOUR_FUNC , MINUTE_FUNC , SECOND_FUNC , MICROSEC...
SQL Server SQL Server Reporting Services, Power View Index .5in is not a valid unit designator. Valid unit designators are in, mm, cm, pt, pc. 'No such host is known' error when configuring Reporting database 'Oracle' data extension not registered 'Return' statement in a Function,Get,o...
Description: The use of a CASE statement or the IF() function within some/most(?) of the group functions, like SUM(), results in the error "#1305 - FUNCTION ... does not exist". The AVG() function works correct. e.g. SELECT SUM ( CASE x WHEN 1 THEN 2 WHEN 2 THEN 4 ELSE ...
This is a reasonable suggestion; variants in SQL syntax notwithstanding, it shouldn't be too hard to implement. For those following the advice of Stack Overflow: There is no need to monkeypatch the sql_aggregates module - if you override the add_to_query function(), you can load the sql...
3、流计算算法由insert on conflict SQL完成,如下 insert into tbl (sid, v1, crt_time) values (:sid, :v1, now()) on conflict (sid) do update set v1=excluded.v1, crt_time=excluded.crt_time, cnt=tbl.cnt+1, sum_v=case tbl.cnt when 1 then tbl.v1+excluded.v1 else tbl.sum_v+...
9、说明:创建视图:create view viewname as select statement删除视图:drop view viewname10、说明:几个简单的基本的sql语句选择:select * from table1 where 范围插入:insert into table1(field1,field2) values(value1,value2)删除:delete from table1 where 范围更新:update table1 set field1=value1 where...