在PostgreSQL中,可以使用array_agg和INTERSECT操作符来找到两个数组的交集。以下是一个示例查询,用于找到两个数组的交集: 代码语言:sql 复制 SELECTARRAY_AGG(valORDERBYval)FROM(SELECTvalFROMunnest(array1)valINTERSECTSELECTvalFROMunnest(array2)val)sub; 在这个查询中,我们首先使用unnest函数将数组拆分为单个值,...
在PostgreSQL中,可以使用array_agg和INTERSECT操作符来找到两个数组的交集。以下是一个示例查询,用于找到两个数组的交集: 代码语言:sql 复制 SELECT ARRAY_AGG(val ORDER BY val) FROM ( SELECT val FROM unnest(array1) val INTERSECT SELECT val FROM unnest(array2) val ) sub; 在这个查询中,我们首先...
注:array_agg 的作用是将范围内的该字段值转变成一个 postgresql 数组 1 2 3 SELECT*, array_agg(id) OVER (ORDERBYidROWSBETWEEN1 PRECEDINGAND1 FOLLOWING) FROMgenerate_series(1, 5)asid; ③ 此窗口的范围是:当前行与当前行之前的行 1 2 3 SELECT*, array_agg(id) OVER (ORDERBYidROWSBETWEENUNBOUN...
WITH sos AS( SELECT array_cat(array_agg(pid), array_agg((pg_blocking_pids(pid))[array_length(pg_blocking_pids(pid),1)]))pids FROM pg_locks WHERE NOT granted ) SELECT a.pid,a.usename,a.datname,a.state, a.wait_event_type||': '||a.wait_event AS wait_event, current_timestamp-...
CREATEEXTENSION MobilityDBCASCADE;CREATETABLEbusTrip(tripID, trip)ASSELECTtripID,tgeompointseq(array_agg(tgeompointinst(geom, t)ORDERBYt))FROMgpsPointGROUPBYtripID;--SELECT 2--Query returned successfully in 78 msec.SELECTtripID, astext(trip)FROMbusTrip;1"[POINT(651096.993815166...
array_to_string(array_agg(projects.name), ',')) as projects FROM projects, tasks, users WHERE projects.id = tasks.project_id AND tasks.due_at > tasks.completed_at AND tasks.due_at > now() AND users.id = projects.user_id GROUP BY ...
严重性:Release blocker关键词:postgresstring_aggarray_aggorderingorderby 抄送:Triage Stage:Accepted Has patch:是Needs documentation:否 Needs tests:否Patch needs improvement:否 Easy pickings:否UI/UX:否 Pull Requests:11172merged 描述(最后由Simone Pellizzari修改)¶ ...
例:select prd_no,binary_checksum(qty)from sales group by prd_no9.CHECKSUM_AGG返回指定数据的校验值,空值被忽略。 例:select prd_no,checksum_agg(binary_checksum(*))from sales group by prd_no10.CHECKSUM返回在表的行上或在表达式列表上计算的校验值,用于生成哈希索引。11.STDEV返回给定表达式中所有值的...
Npgsql.PostgresException(0x80004005):42703:列“enumsortorder”不存在 at sql SELECT nspname, typname, array_agg(enumlabel ORDER BY enumsortorder) AS labels FROM pg_enum JOIN pg_type ON pg_type.oid = enumtypid JOIN pg_namespace ON pg_namespace.oid = pg_type.typnamespace ...
(uid2) uid2s from user_membership_'||i||' group by uid1';executesql;sql:='create unique index idx_mv_user_membership_'||i||'_1 on mv_user_membership_'||i||' (uid1)';executesql;sql:='create materialized view mv_user_membership_rev_'||i||' as select uid2,array_agg(uid1)...