Mysql postgresql 行列转换

　　一、第一种

　　原数据表

　　

　　转换后

　　

DROP TABLE IF EXISTS tempdynamic;
CREATE  TEMPORARY TABLE tempdynamic (
 SELECT p.fsPaymentName,sr.fsPaymentId,sh.fsShiftName,SUM(sr.fdReceMoney) as AmtTotal FROM tbsell as s
INNER JOIN tbSellReceive as sr ON s.fsSellNo=sr.fsSellNo AND s.fsShopGUID=sr.fsShopGUID
INNER JOIN tbpayment as p  on  sr.fsPaymentId =p.fsPaymentId  and p.fsShopGUID=s.fsShopGUID and  p.fiStatus=1
INNER JOIN tbSellCheck as sc on sc.fsSellNo=s.fsSellNo AND s.fsShopGUID=sc.fsShopGUID
INNER JOIN tbshift as sh ON sc.fsShiftId=sh.fsShiftId AND sh.fiStatus=1
WHERE s.fiBillStatus=3
AND s.fsShopGUID='c5f0d5c9d8b349f493c180bcc22d9ce0'
AND s.fsSellDate='2016-01-15'
GROUP BY sr.fsPaymentId,sc.fsShiftId);
 
SET @EE='';
set @str_tmp='';
 
SELECT   @EE:=CONCAT(@EE,'SUM(IF(fsShiftName=\'',fsShiftName,'\'',',AmtTotal,0)) AS ',fsShiftName,',') as aa into @str_tmp
FROM (
 SELECT DISTINCT fsShiftName from  tempdynamic
) A order by length(aa) desc limit 1;
 
SET @QQ=CONCAT('SELECT  ifnull(fsPaymentName,\'total\') as 科目名称 ,',@str_tmp,' SUM(AmtTotal)  as 合计 FROM tempdynamic Group by fsPaymentName  WITH ROLLUP');
 
PREPARE stmt  FROM @QQ;
EXECUTE stmt ;
deallocate prepare stmt;

　　二、第二种

　　原数据表

　　

　　转换后

　　

 DROP TABLE IF EXISTS tempdynamic;
 CREATE    TABLE tempdynamic (
   SELECT sh.fsShiftName,sh.fsShiftId, SUM(s.fdSaleAmt) as  销售金额,SUM(s.fdDiscountAmt) as 折扣金额, SUM(s.fdServiceAmt) as 服务费金额,SUM(s.fdExpAmt) as 应收金额 ,SUM(s.fdRealAmt) as 实收金额
  FROM tbsell as s
 INNER JOIN tbSellCheck as sc on sc.fsSellNo=s.fsSellNo AND s.fsShopGUID=sc.fsShopGUID
 INNER JOIN tbshift as sh ON sc.fsShiftId=sh.fsShiftId AND sh.fiStatus=1
 WHERE s.fiBillStatus=3
 AND s.fsShopGUID='c5f0d5c9d8b349f493c180bcc22d9ce0'
 AND s.fsSellDate='2016-01-15'
 GROUP BY   sc.fsShiftId);
 
 DROP TABLE IF EXISTS tempdynamica;
 CREATE  TEMPORARY TABLE tempdynamica(
 SELECT a.* FROM (
 SELECT   fsShiftName,'销售金额'   AS     科目,销售金额   AS   AmtTotal   FROM   tempdynamic   UNION   ALL
 SELECT   fsShiftName,'折扣金额'   AS     科目,折扣金额   AS   AmtTotal   FROM   tempdynamic   UNION   ALL
 SELECT   fsShiftName,'服务费金额' AS     科目,服务费金额   AS   AmtTotal   FROM   tempdynamic UNION   ALL
 SELECT   fsShiftName,'应收金额'   AS     科目,应收金额   AS   AmtTotal   FROM   tempdynamic UNION   ALL
 SELECT   fsShiftName,'实收金额'   AS     科目,实收金额   AS   AmtTotal   FROM   tempdynamic
 ORDER BY fsShiftName,科目 DESC) as a );
 
 SET @EE='';
 set @str_tmp='';
 SELECT  @EE:=CONCAT(@EE,'SUM(IF(fsShiftName=\'',fsShiftName,'\'',',AmtTotal ,0)) AS ',fsShiftName,',') as aa into @str_tmp
 FROM (
  SELECT DISTINCT fsShiftName from  tempdynamic
 ) A order by length(aa) desc limit 1;
 SET @QQ=CONCAT('SELECT  ifnull(科目,\'total\')  as 科目名称,',@str_tmp,'sum(AmtTotal) as 合计 FROM tempdynamica Group by  科目 WITH ROLLUP');
  PREPARE stmt  FROM @QQ;
 EXECUTE stmt ;
 deallocate prepare stmt;

postgresql

　　原数据：

　　

　　转换后：

　　

　　sql:

　　

CREATE OR REPLACE FUNCTION "public"."test"()
  RETURNS "pg_catalog"."void" AS $BODY$
DECLARE
dynsql1 VARCHAR ;
dynsql2 VARCHAR ;
dynsql3 VARCHAR ;
BEGIN
	drop table if exists temp_sell;
	dynsql1='CREATE TEMP TABLE temp_sell AS SELECT
	bd.area_id,
	bd.area_name,
	bd.sell_date,
	SUM (
		COALESCE (bss.original_amt, 0)
	) AS original_amt
FROM
	bill_detail AS bd
INNER JOIN bill_settlement_summary AS bss ON bd.bill_id = bss.bill_id
WHERE
	bd.sell_date BETWEEN ''2018-01-01''
AND ''2018-01-30''
AND bd.shop_guid=''143174''
-- AND area_id=''''
-- AND msection_id=''''
GROUP BY
	bd.sell_date,
	bd.area_id,
	bd.area_name;';
 EXECUTE dynsql1;
  dynsql2 = '';
	dynsql3 = '';
	drop table if exists temp_sell_1;
	CREATE TEMP TABLE temp_sell_1 AS
		SELECT concat('SUM(CASE WHEN sell_date=''',sell_date,'''','then original_amt else 0 end) AS "',sell_date,'"') AS aa
		FROM
				(SELECT DISTINCT
						sell_date
				FROM
						temp_sell) A
		 ORDER BY sell_date ASC ;
		SELECT string_agg(aa, ',') INTO dynsql2 from  temp_sell_1;
		RAISE NOTICE 'dynsql2==[%]', dynsql2 ;
		 dynsql3 = CONCAT(
			'SELECT area_id as 区域id,area_name as 区域名称,' ,dynsql2,
			',sum(original_amt) 汇总 FROM temp_sell Group By  area_id,area_name;'
		);
	  RAISE NOTICE 'dynsql3==[%]', dynsql3 ;
END ;
$BODY$
  LANGUAGE 'plpgsql' VOLATILE COST 100
;
SELECT test();
SELECT area_id as 区域id,area_name as 区域名称,SUM(CASE WHEN sell_date='2018-01-12'then original_amt else 0 end) AS "2018-01-12",SUM(CASE WHEN sell_date='2018-01-18'then original_amt else 0 end) AS "2018-01-18",SUM(CASE WHEN sell_date='2018-01-19'then original_amt else 0 end) AS "2018-01-19",SUM(CASE WHEN sell_date='2018-01-25'then original_amt else 0 end) AS "2018-01-25",sum(original_amt) 汇总 FROM temp_sell Group By  area_id,area_name;

　　

第二种方案：

参考： http://www.cureffi.org/2013/03/19/automatically-creating-pivot-table-column-names-in-postgresql/

使用函数如下：

CREATE OR REPLACE FUNCTION "public"."pivotcode"("tablename" varchar, "rowc" varchar, "rowctype" varchar, "groupby" varchar, "colc" varchar, "cellc" varchar, "celldatatype" varchar)
  RETURNS "pg_catalog"."void" AS $BODY$
DECLARE rec record ; dynsql1 VARCHAR ; dynsql2 VARCHAR ; countrows INT; columnlist VARCHAR ;
BEGIN
    drop table if exists temp_sell_result;
    dynsql1 = 'select count(1) from ' || tablename || ';' ;
    EXECUTE dynsql1 INTO countrows ;
    IF countrows=0 THEN
        dynsql1='CREATE TEMP TABLE temp_sell_result AS select * from ' || tablename || ';';
        EXECUTE dynsql1;
    ELSE
        -- 1. retrieve list of column names.
        dynsql1 = 'select string_agg(distinct ''"''||' || colc || '||''" ' || celldatatype || ''','','' order by ''"''||' || colc || '||''" ' || celldatatype || ''') from ' || tablename || ';' ;
        --RAISE NOTICE '%', dynsql1 ;
        EXECUTE dynsql1 INTO columnlist ;
        -- 2. set up the crosstab query
 
        dynsql2 = 'CREATE TEMP TABLE temp_sell_result AS select * from crosstab (
        ''select ' || rowc || ',' || colc || ',' || cellc || ' from ' || tablename || ' group by '||groupby||' order by '||groupby||''',
        ''select distinct ' || colc || ' from ' || tablename || ' order by 1''
        )
        as newtable (
        ' || rowctype ||  ',' || columnlist || '
        );' ;
        EXECUTE dynsql2 ;
    END IF;
END ;
$BODY$
  LANGUAGE 'plpgsql' VOLATILE COST 100
;
 
ALTER FUNCTION "public"."pivotcode"("tablename" varchar, "rowc" varchar, "rowctype" varchar, "groupby" varchar, "colc" varchar, "cellc" varchar, "celldatatype" varchar) OWNER TO "winposdev";