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[英]Postgres check constraint in text array for the validity of the values
[英]Postgres check if any of array values is in a list
如何檢查列表中是否有單行中的任何數組值?
這是我的桌子。 我們稱之為ABC
id | page_id | values
------------------+-------------+-------------------------------------------------------------------------
1376092679147519 | xyz | {6004036173148,6003373173651,6003050657850}
1375487155874738 | xyz | {6003301698460,6003232518610}
1497527026945449 | xyz | {6003654559478,6003197656807}
1375388575884596 | xyz | {6003512053894,6003450241842,6003051414416}
1319144441504401 | xyz | {6004001256506,6003514818642,6003400993421}
我的目的是選擇那些行,其中一個值出現在給定列表中(“ 6004036173148”,“ 6003197656807”)。
SELECT id, page_id, values from ABC WHERE -SOME CLAUSE- IN ('6004036173148', '6003197656807');
id | page_id | values
------------------+-------------+-------------------------------------------------------------------------
1376092679147519 | xyz | {6004036173148,6003373173651,6003050657850}
1497527026945449 | xyz | {6003654559478,6003197656807}
這是我的PosgreSQL表的結構
Table "public.ABC"
Column | Type | Modifiers
--------------------+--------------------------+------------------------
id | character varying | not null
page_id | character varying | not null
values | character varying[] |
Indexes:
"ABC_pkey" PRIMARY KEY, btree (id)
如果我正確理解,則需要這樣做:
select * from t
where "values" && '{6004036173148,6003197656807}'::character varying[]
編輯
如果您需要提取某些值,則可以使用unnest
函數
請注意,如果同一數組包含來自搜索列表的多個值,則將重復行。 看一下id=2
示例輸出,您可以看到我在說什么:
with t(id, values) as(
select 1, '{6004036173147,6003373173651,6003050657840}'::character varying[]
union all
select 2, '{6004036173148,6003373173652,6003050657850}'::character varying[]
union all
select 3, '{6004036173149,6003373173653,6003050657860}'::character varying[]
)
select tt.* from
(select t.*, unnest(values) unn from t) tt
inner join (select unnest('{6003373173651,6004036173148,6003373173652}'::character varying[]) v ) lst
on tt.unn = lst.v
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