Oracle模式SQL基礎知識

2021-09-12 03:10:25 字數 2576 閱讀 3922

--建立用於測試的表及資料

create table t603

( code varchar2(10),

year varchar2(10),

month varchar2(10),

p_id varchar2(7),

v1 number(10),

v2 number(10)

);comment on column t603.code is '工廠';

comment on column t603.year is '年份';

comment on column t603.month is '月份';

comment on column t603.p_id is '產品';

comment on column t603.v1 is '生產量';

comment on column t603.v2 is '銷售量';

insert into t603 values('600001',2012,11,'30',1,1);

insert into t603 values('600001',2012,11,'31',1,1);

insert into t603 values('600001',2012,11,'10',2,2);

insert into t603 values('600002',2012,12,'10',3,2);

insert into t603 values('600002',2012,12,'31',2,1);

insert into t603 values('600002',2012,12,'30',2,1);

select * from t603;

--按自定義的規則聚合

select code,

p_id,

v1 from t603

where code in ('600001', '600002')

model return updated rows --model後面的return updated rows子句將結果限制為在該查詢中建立或更新的那些行,使結果集只包含新計算的值。

partition by(code) --分割槽

dimension by(p_id) --維度

measures(v1) --度量

rules (v1['err1'] = v1['30'] + v1['31'] - v1['10']) --計算規則

order by code, p_id;

輸出   codep_idv1

1600001err10

2600002err11

--按多個規則聚合,返回包括非聚合行

select code,

year,

p_id,

month,

v1from t603

where year = '2012'

model

partition by (code,year)

dimension by (p_id,month)

measures (v1,v2)

rules (

v1['err1',11] = v1['30',11] + v1['31',11] - v1['10',11],

v2['err1',12] = v2['30',12] + v2['31',12] - v2['10',12])

order by code, p_id;

輸出   codeyearp_idmonthv1

46000012012err112

56000012012err1110

96000022012err112

106000022012err111

--指定要聚合的維值

select code,

p_id,

month,

v1from t603

where year = '2012'

model return updated rows

partition by (code)

dimension by (p_id,month)

measures (v1)

rules (

v1['err1',for month in(11,12)] = v1['30',cv(month)] + v1['31',cv(month)] -v1['10',cv(month)])

order by code, p_id, month;

輸出  codep_idmonthv1

1600001err1110

2600001err112

3600002err111

4600002err1121

--cv()函式獲取多行統計記錄的當前值,可以使用表示式進行計算

--為數值型可用語法:for month from 1 to 12 increment 1

--還可以使用子查詢:for year in (select year from t603)

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