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[数据库]MySQL实现统计数据并插入数据的存储过程


统计存储过程,这里是将统计的结果插入一个表中,后台可以有定时任务来调此存储过程。以下业务是统计仓库中商品流转情况,包括:日期、商品总数、入库数量、出库数量。 

BEGIN  DECLARE ES_COR_CODE VARCHAR(20);  -- 需要定义接收游标数据的变量   DECLARE table_ VARCHAR(50);  -- 遍历数据结束标志  DECLARE done INT DEFAULT FALSE;  -- 游标  DECLARE cur CURSOR FOR SELECT TABLE_NAME FROM (SELECT TABLE_NAME from information_schema.tables WHERE TABLE_NAME LIKE '%wm_item_transfer_%' AND TABLE_SCHEMA='wmscloud_test' ) allTables;  -- 将结束标志绑定到游标  DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;  -- 打开游标  OPEN cur;   -- 开始循环  read_loop: LOOP   -- 提取游标里的数据,这里只有一个,多个的话也一样;  FETCH cur INTO table_;  -- 声明结束的时候  IF done THEN    LEAVE read_loop;   END IF;   SET ES_COR_CODE=substring(table_,18);    SET @INSERT_ITEM_TRANSFER=CONCAT('INSERT INTO wm_item_transfer_',ES_COR_CODE,' (WMIT_DATE,WMIT_STOCK_NUM,WMIT_INTO_ITEM_NUM,WMIT_OUT_ITEM_NUM)    SELECT   (SELECT date_sub(curdate(),interval 1 day) ) WMIT_DATE ,  (SELECT IFNULL(SUM(WMST_NOW_NUMBER),0) FROM wm_stock_',ES_COR_CODE,') WMIT_STOCK_NUM,  (SELECT IFNULL(SUM(WMST_NOW_NUMBER),0) FROM wm_stock_',ES_COR_CODE,' WHERE  WMST_RECEIVE_DATE BETWEEN date_sub(curdate(),interval 1 day) AND NOW() ) WMIT_INTO_ITEM_NUM,  (SELECT IFNULL(SUM(WMOO_OUT_NUMBER),0) FROM wm_out_order_',ES_COR_CODE,' where SURE_DATE BETWEEN date_sub(curdate(),interval 1 day) AND NOW() ) WMIT_OUT_ITEM_NUM');  PREPARE INSERT_ITEM_TRANSFER FROM @INSERT_ITEM_TRANSFER;  EXECUTE INSERT_ITEM_TRANSFER;   END LOOP;  -- 关闭游标  CLOSE cur;   END 

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