Java，基於SSM,省市區三級聯動後臺查詢（單表），附（建表語句+查詢Sql）
1、建表語句
CREATE TABLE "hxdb"."sys_area" ( "id" varchar(64) COLLATE "default" NOT NULL, "code" varchar(64) COLLATE "default", "province" varchar(64) COLLATE "default", "city" varchar(64) COLLATE "default", "district" varchar(64) COLLATE "default", "parent" varchar(64) COLLATE "default" ) WITH (OIDS=FALSE);
2、查詢Sql語句
WITH RECURSIVE cte AS ( SELECT ID, code, province, city, district, parent FROM hxdb.sys_area A WHERE parent = '1' UNION ALL SELECT K . ID, K .code, K .province, K .city, K .district, K .parent FROM hxdb.sys_area K INNER JOIN cte C ON C .parent = K . ID ) SELECT ID, code, province, city, district, parent FROM hxdb.sys_area cte WHERE province != '' OR city != '' OR district != ''