•语法:CASE WHEN列名IN (值1,值2, ...) THEN结果1 ELSE结果2 END •说明:在指定列名的值中,如果存在某个值和给定的值列表匹配,则返回结果1;如果没有匹配项,则返回结果2。 示例: SELECTname, CASEWHENageIN(20,30)THEN'青年' WHENageIN(40,50)THEN'中年' ...
CASE WHEN col_1 IN ( 'a', 'b') THEN '第一类' WHEN col_1 IN ('a') THEN '第二类' ELSE'其他' END 下面我们来看一下,使用Case函数都能做些什么事情。 一,已知数据按照另外一种方式进行分组,分析。 有如下数据:(为了看得更清楚,我并没有使用国家代码,而是直接用国家名作为Primary Key) 国家(co...
问将IN条件用于Case When语句Oracle SQLEN这两种方式，可以实现相同的功能。简单Case函数的写法相对比较...
with t as (select (case when level in (1, 2) then 1 when level in (4, 5) then 6 else level end) id from dual connect by level < 10) select id, sum(id) over(order by id) default_sum, sum(id) over(order by id range between unbounded preceding and current row) range_unbound...
WHEN这两种写法查询结果不一样,请问区别在哪里?A:select sum(case when a.city_id in (47,45,35,37,36) then1 else 0 end) 甘肃北部,sum(case when a.city_id in (34,33,32) then1 else 0 end) 甘肃东部,sum(case when a.city_id in (39,38,41) then1 else 0 end)甘肃南部,sum(case ...
STAT #364949696 id=3 cnt=2 pid=2 pos=1 obj=0 op='INLIST ITERATOR (cr=7 pr=0 pw=0 time=73 us)' STAT #364949696 id=4 cnt=2 pid=3 pos=1 obj=39001 op='TABLE ACCESS BY INDEX ROWID T1 (cr=7 pr=0 pw=0 time=70 us cost=4 size=4056 card=2)' ...
TDSQL PG版实现方法是将不再target_el以及columnref中的列作为group by列,通过pivot_expr_list对target_el中的聚集函数参数用case when进行重写,规则是“有值取值、没值取空”。 UNPivot可以将列属性转行数据, 本质是转化为 join lateral。实现方法是获取IN中的列,拼接成VALUES(…),将UNPIVOT column和FOR column...
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xiii xiv What's New in This Guide for Release 11.1.1.7 This guide has been updated in several ways. The following table lists the sections that have been added or changed. For a list of known issues (release notes), see the "Known Issues for for Oracle SOA Products and Oracle AIA ...