参考官方文档create or replace function creatData2() returns boolean AS$BODY$declare ii integer; begin II:=1; FOR ii IN 1..10000000 LOOP INSERT INTO ipm_model_history_data (res_model, res_id) VALUES (116, ii); end loop; return true..
有三张表,分别如下:select * from vehicleselect * from stationselect * from vehicle_station需求:vehicle和station表示多对多的关系,需要把vehicle表对应的station表的第二字段查出来放到一个字段,如果对应多条,用逗号隔开放到一个字段。..
创建RoleCREATE USER <role_name> PASSWORD '<role_password>';赋予权限赋予database所有权限GRANT ALL ON DATABASE <db_name> TO <role_name>;赋予只读权限 (不能再db level直接赋予SELECT权限)GRANT SELECT ON ALL TABLES IN SCHEMA <schema_nam..
我就废话不多说了,大家还是直接看代码吧~select * from (select ROW_NUMBER () OVER (ORDER BY fat desc nulls last) AS xuhao,foodnum,foodname,fat from ek_food where isdel=0) food where foodnum = 'Ss192008'涉及到的问题1.排序时,字段值为..