在PostgreSQL 9.4及以上版本中,可以使用jsonb_object_agg函数将键值对聚合成JSON对象,从而间接实现行转列的效果。 示例代码: sql SELECT year, jsonb_object_agg(quarter::text, sales_amount) AS data FROM sales GROUP BY year; 这将为每个年份生成一个JSON对象,其中键是季度,值是对应的销售额。 验证转换结...
1. (2)数据表转为geojson SELECT jsonb_build_object ('type','FeatureCollection','features',jsonb_agg (feature)) as geojson FROM (SELECT jsonb_build_object ('type','Feature','geometry',ST_AsGeoJSON (mgeom) :: jsonb,'properties',to_jsonb (ROW) - 'mgeom') AS feature FROM (SELECT...
'$.PONumber' returning NUMBER(10)) -- 错误示例2:大小写错误,Name应为name select JSON_VALUE(PO_DOCUMENT ,'$.ShippingInstructions.Name') from J_PURCHASEORDER where JSON_VALUE(PO_DOCUMENT ,'$.PONumber' returning NUMBER(10)) = 450
Pgsql数据库jsonb操作函数集合
json_agg( json_build_object( 'table', tp.table_name, 'privilege', tp.privilege_type ) ) FROM information_schema.table_privileges tp WHERE tp.table_catalog = d.datname AND tp.grantee = r.rolname ) ) as privileges FROM pg_roles r CROSS JOIN pg_database d WHERE r.rolname =...
vi/var/lib/zabbix/postgresql/pgsql.dbstat.sql#修改为以下内容SELECTjson_object_agg(datname,row_to_json(T))FROM(SELECTdatname,numbackends,xact_commit,xact_rollback,blks_read,blks_hit,tup_returned,tup_fetched,tup_inserted,tup_updated,tup_deleted,conflicts,temp_files,temp_bytes,deadlocksFROMpg_sta...
CREATEORREPLACEFUNCTION"json_object_set_keys"( "json" json, "keys_to_set"TEXT[], "values_to_set" anyarray )RETURNSjson LANGUAGE sql IMMUTABLE STRICTAS$function$SELECTconcat('{', string_agg(to_json("key")||':'||"value",','),'}')::jsonFROM(SELECT*FROMjson_each("json")WHERE"key...
21. json和jsonb 或 Array 里取值出来 请参考操作符 22. 插入自增列 insert into test (id, info) OVERRIDING SYSTEM VALUE values (1,'test'); 23.生成GUID需要添加扩展. 以下为一种(还有其它的方式) create extension "uuid-ossp" ; select uuid_generate_v4() ...
JSON_ARRAYAGG(), JSON_OBJECTAGG() too, which were added in v16. Should this change be backpatched? In general, what's our stance on changes that cater to improving standard compliance, but are not necessarily bugs. -- Thanks, Amit Langote...
import com.alibaba.fastjson.JSONObject; import com.baomidou.mybatisplus.core.mapper.BaseMapper; import com.xxx.entity.UserInfo; import org.apache.ibatis.annotations.*; import org.apache.ibatis.type.JdbcType; import java.util.List; @Mapper