SQL错误 [42883]: ERROR:functionpg_notify(unknown,json) doesnotexist Hint:Nofunctionmatches the givennameandargumenttypes. You might needtoaddexplicittypecasts. 如果不用row_to_json,这样写没有问题: SELECTpg_notify('hello', (select'1'asa) ); 怎么解决该问题,怎么将pg_notify和row_to_json这两个函...
PgSql 行转列的使用 jsonb_each与row_to_json 1:正常的几行数据 2:转换后 3:code (以commodity来分组) select"Id","JabilPn","Brand","PricelnUsd","Commodity"from"Eme_Materials"emwhere"Id"<=3select"Commodity",(q.qq).keyas"key",(q.qq).valueas"value"from( with aas(select"Id","JabilP...
SELECT array_to_json(array_agg(row_to_json(sys_xzqh))) from sys_xzqh where xzqh like '%341126%'
row_to_json SELECT'Feature'Astype,ST_AsGeoJSON(lg.aoi_geom)::jsonAsgeometry,row_to_json((SELECTlFROM(SELECTaoi_name,hn_id)Asl))AspropertiesFROMpoi_hn_aoi lg limit10;selectrow_to_json(t)from(select aoi_name,aoi_id from poi_hn_aoi limit10)t;selectrow_to_json((SELECTlFROM(SELECTaoi_...
一、将结果集封装成JSON 关于如何查询返回 JSON,这里 有例子,翻译如下: 一个简单的用法就是使用 row_to_json() 函数,它接受 “行值”并返回 JSON 对象: select row_to_json(tableName) from tableName; 1. 上面查询语句返回结果类似如下: {"id":6013,"text":"advancement","pronunciation":"advancement",...
(1 row) ---2.去重 SELECT '{"bar": "baz", "balance": 7.77, "balance":false}'::jsonb; --去重 {"bar": "baz", "balance": false} SELECT '{"bar": "baz", "balance": 7.77, "balance":false}'::json; --不去重 {"bar":...
VALUES (TG_TABLE_NAME, TG_OP, row_to_json(NEW)); RETURN NEW; END; $$ LANGUAGE plpgsql; CREATE TRIGGER trigger_log_changes AFTER INSERT OR UPDATE ON your_table FOR EACH ROW EXECUTE FUNCTION log_changes(); 这种方法非常适合用于自动日志记录、数据审计等场景。
("postgresql://scott:tiger@localhost/test", echo=True) Base.metadata.drop_all(e) Base.metadata.create_all(e) s = Session(e) s.add_all([ A(x=1, y=2), A(x=5, y=4) ]) s.commit() subq = s.query(A).subquery() print s.query(func.row_to_json(as_row(subq))).select_...
vi/var/lib/zabbix/postgresql/pgsql.dbstat.sql#修改为以下内容SELECTjson_object_agg(datname,row_to_json(T))FROM(SELECTdatname,numbackends,xact_commit,xact_rollback,blks_read,blks_hit,tup_returned,tup_fetched,tup_inserted,tup_updated,tup_deleted,conflicts,temp_files,temp_bytes,deadlocksFROMpg_sta...
Get the nearest neighbors to a rowSELECT * FROM items WHERE id != 1 ORDER BY embedding <-> (SELECT embedding FROM items WHERE id = 1) LIMIT 5;Get rows within a certain distanceSELECT * FROM items WHERE embedding <-> '[3,1,2]' < 5;...