您好我在存储过程中有一个准备好的语句，根据创建日期动态生成列。问题是当我执行我的存储过程一旦运行良好并运行良好。但是当我改变它的参数值时。它获得错误1054具有未知列示例'十二月'。我读过一些关于它的文章。它说“预准备语句是一种用于以高效率重复执行相同（或类似）SQL语句的功能。”？这是代码。谢谢。请忽略您在编辑时看到的其他参数，不会影响结果。
CREATE DEFINER=`root`@`%` PROCEDURE `MyStoredProcedure`(
IN `_PageIndex` INT,
`_PageSize` INT,
OUT `_RecordCount` INT,
_DateCreatedFrom VARCHAR(50),
_DateCreatedTo VARCHAR(50)
） BEGIN
DECLARE _Jan INT;
DECLARE _Feb INT;
DECLARE _Mar INT;
DECLARE _Apr INT;
DECLARE _May INT;
DECLARE _Jun INT;
DECLARE _Jul INT;
DECLARE _Aug INT;
DECLARE _Sep INT;
DECLARE _Oct INT;
DECLARE _Nov INT;
DECLARE _Dec INT;
DECLARE _sql VARCHAR(65535);
DECLARE _sql_dynamic VARCHAR(65535);
DECLARE _GrandTotal VARCHAR(65535);
DECLARE _offset INT;
DECLARE _Year VARCHAR(50);
DROP TEMPORARY TABLE IF EXISTS Results;
SET _Jan = 1;
SET _Feb = 2;
SET _Mar = 3;
SET _Apr = 4;
SET _May = 5;
SET _Jun = 6;
SET _Jul = 7;
SET _Aug = 8;
SET _Sep = 9;
SET _Oct = 10;
SET _Nov = 11;
SET _Dec = 12;
SET _Year = YEAR(CAST(_DateCreatedFrom AS DATE));
SET _DateCreatedFrom = MONTH(CAST(_DateCreatedFrom AS DATE));
SET _DateCreatedTo = MONTH(CAST(_DateCreatedTo AS DATE));
SET _sql = '';
SET _sql_dynamic = '';
SET _GrandTotal = '';
SET @stmt_str = '';
SET _offset = (_PageIndex - 1) * _PageSize;
SET @rownum=0;
SET _sql:= CONCAT('CREATE TEMPORARY TABLE Results ');
SET _sql:= CONCAT(_sql,'SELECT @rownum:=@rownum+1 AS ''#'', a.*, (');
IF(_Jan BETWEEN _DateCreatedFrom AND _DateCreatedTo) THEN
SET _sql_dynamic:= CONCAT('COUNT(IF(MONTH(tr.`DateCreated`) = 1 AND YEAR(tr.`DateCreated`) = ', _Year ,', 1, null)) AS January,');
SET _GrandTotal := CONCAT(_GrandTotal,'January + ');
IF(_DateCreatedTo = 1) THEN
SET _sql_dynamic:= SUBSTRING(_sql_dynamic,1,LENGTH(_sql_dynamic) - 1);
SET _GrandTotal := SUBSTRING(_GrandTotal,1,LENGTH(_GrandTotal) - 2);
END IF;
END IF;
IF(_Feb BETWEEN _DateCreatedFrom AND _DateCreatedTo) THEN
SET _sql_dynamic:= CONCAT(_sql_dynamic,'COUNT(IF(MONTH(tr.`DateCreated`) = 2 AND YEAR(tr.`DateCreated`) = ', _Year ,', 1, null)) AS February,');
SET _GrandTotal := CONCAT(_GrandTotal,'February + ');
IF(_DateCreatedTo = 2) THEN
SET _sql_dynamic:= SUBSTRING(_sql_dynamic,1,LENGTH(_sql_dynamic) - 2);
SET _GrandTotal := SUBSTRING(_GrandTotal,1,LENGTH(_GrandTotal) - 2);
END IF;
END IF;
IF(_Mar BETWEEN _DateCreatedFrom AND _DateCreatedTo) THEN
SET _sql_dynamic:= CONCAT(_sql_dynamic,'COUNT(IF(MONTH(tr.`DateCreated`) = 3 AND YEAR(tr.`DateCreated`) = ', _Year ,', 1, null)) AS March,');
SET _GrandTotal := CONCAT(_GrandTotal,'March + ');
IF(_DateCreatedTo = 3) THEN
SET _sql_dynamic:= SUBSTRING(_sql_dynamic,1,LENGTH(_sql_dynamic) - 2);
SET _GrandTotal := SUBSTRING(_GrandTotal,1,LENGTH(_GrandTotal) - 2);
END IF;
END IF;
IF(_Apr BETWEEN _DateCreatedFrom AND _DateCreatedTo) THEN
SET _sql_dynamic:= CONCAT(_sql_dynamic,'COUNT(IF(MONTH(tr.`DateCreated`) = 4 AND YEAR(tr.`DateCreated`) = ', _Year ,', 1, null)) AS April,');
SET _GrandTotal := CONCAT(_GrandTotal,'April + ');
IF(_DateCreatedTo = 4) THEN
SET _sql_dynamic:= SUBSTRING(_sql_dynamic,1,LENGTH(_sql_dynamic) - 2);
SET _GrandTotal := SUBSTRING(_GrandTotal,1,LENGTH(_GrandTotal) - 2);
END IF;
END IF;
IF(_May BETWEEN _DateCreatedFrom AND _DateCreatedTo) THEN
SET _sql_dynamic:= CONCAT(_sql_dynamic,'COUNT(IF(MONTH(tr.`DateCreated`) = 5 AND YEAR(tr.`DateCreated`) = ', _Year ,', 1, null)) AS May,');
SET _GrandTotal := CONCAT(_GrandTotal,'May + ');
IF(_DateCreatedTo = 5) THEN
SET _sql_dynamic:= SUBSTRING(_sql_dynamic,1,LENGTH(_sql_dynamic) - 2);
SET _GrandTotal := SUBSTRING(_GrandTotal,1,LENGTH(_GrandTotal) - 2);
END IF;
END IF;
IF(_Jun BETWEEN _DateCreatedFrom AND _DateCreatedTo) THEN
SET _sql_dynamic:= CONCAT(_sql_dynamic,'COUNT(IF(MONTH(tr.`DateCreated`) = 6 AND YEAR(tr.`DateCreated`) = ', _Year ,', 1, null)) AS June,');
SET _GrandTotal := CONCAT(_GrandTotal,'June + ');
IF(_DateCreatedTo = 6) THEN
SET _sql_dynamic:= SUBSTRING(_sql_dynamic,1,LENGTH(_sql_dynamic) - 2);
SET _GrandTotal := SUBSTRING(_GrandTotal,1,LENGTH(_GrandTotal) - 2);
END IF;
END IF;
IF(_Jul BETWEEN _DateCreatedFrom AND _DateCreatedTo) THEN
SET _sql_dynamic:= CONCAT(_sql_dynamic,'COUNT(IF(MONTH(tr.`DateCreated`) = 7 AND YEAR(tr.`DateCreated`) = ', _Year ,', 1, null)) AS July,');
SET _GrandTotal := CONCAT(_GrandTotal,'July + ');
IF(_DateCreatedTo = 7) THEN
SET _sql_dynamic:= SUBSTRING(_sql_dynamic,1,LENGTH(_sql_dynamic) - 2);
SET _GrandTotal := SUBSTRING(_GrandTotal,1,LENGTH(_GrandTotal) - 2);
END IF;
END IF;
IF(_Aug BETWEEN _DateCreatedFrom AND _DateCreatedTo) THEN
SET _sql_dynamic:= CONCAT(_sql_dynamic,'COUNT(IF(MONTH(tr.`DateCreated`) = 8 AND YEAR(tr.`DateCreated`) = ', _Year ,', 1, null)) AS August,');
SET _GrandTotal := CONCAT(_GrandTotal,'August + ');
IF(_DateCreatedTo = 8) THEN
SET _sql_dynamic:= SUBSTRING(_sql_dynamic,1,LENGTH(_sql_dynamic) - 2);
SET _GrandTotal := SUBSTRING(_GrandTotal,1,LENGTH(_GrandTotal) - 2);
END IF;
END IF;
IF(_Sep BETWEEN _DateCreatedFrom AND _DateCreatedTo) THEN
SET _sql_dynamic:= CONCAT(_sql_dynamic,'COUNT(IF(MONTH(tr.`DateCreated`) = 9 AND YEAR(tr.`DateCreated`) = ', _Year ,', 1, null)) AS September,');
SET _GrandTotal := CONCAT(_GrandTotal,'September + ');
IF(_DateCreatedTo = 9) THEN
SET _sql_dynamic:= SUBSTRING(_sql_dynamic,1,LENGTH(_sql_dynamic) - 2);
SET _GrandTotal := SUBSTRING(_GrandTotal,1,LENGTH(_GrandTotal) - 2);
END IF;
END IF;
IF(_Oct BETWEEN _DateCreatedFrom AND _DateCreatedTo) THEN
SET _sql_dynamic:= CONCAT(_sql_dynamic,'COUNT(IF(MONTH(tr.`DateCreated`) = 10 AND YEAR(tr.`DateCreated`) = ', _Year ,', 1, null)) AS October,');
SET _GrandTotal := CONCAT(_GrandTotal,'October + ');
IF(_DateCreatedTo = 10) THEN
SET _sql_dynamic:= SUBSTRING(_sql_dynamic,1,LENGTH(_sql_dynamic) - 2);
SET _GrandTotal := SUBSTRING(_GrandTotal,1,LENGTH(_GrandTotal) - 2);
END IF;
END IF;
IF(_Nov BETWEEN _DateCreatedFrom AND _DateCreatedTo) THEN
SET _sql_dynamic:= CONCAT(_sql_dynamic,'COUNT(IF(MONTH(tr.`DateCreated`) = 11 AND YEAR(tr.`DateCreated`) = ', _Year ,', 1, null)) AS November,');
SET _GrandTotal := CONCAT(_GrandTotal,'November + ');
IF(_DateCreatedTo = 11) THEN
SET _sql_dynamic:= SUBSTRING(_sql_dynamic,1,LENGTH(_sql_dynamic) - 2);
SET _GrandTotal := SUBSTRING(_GrandTotal,1,LENGTH(_GrandTotal) - 2);
END IF;
END IF;
IF(_Dec BETWEEN _DateCreatedFrom AND _DateCreatedTo) THEN
SET _sql_dynamic:= CONCAT(_sql_dynamic,'COUNT(IF(MONTH(tr.`DateCreated`) = 12 AND YEAR(tr.`DateCreated`) = ', _Year ,', 1, null)) AS December ');
SET _GrandTotal := CONCAT(_GrandTotal,'+ December ');
IF(_DateCreatedTo = 12) THEN
SET _sql_dynamic:= SUBSTRING(_sql_dynamic,1,LENGTH(_sql_dynamic) - 2);
SET _GrandTotal := CONCAT('December ');
END IF;
END IF;
SET _GrandTotal := CONCAT(_GrandTotal,') ''GRAND TOTAL'' ');
SET _sql := CONCAT(_sql,_GrandTotal);
SET _sql := CONCAT(_sql,'FROM( SELECT IFNULL(Problem, ''GRAND TOTAL'') Problem, ');
SET _sql := CONCAT(_sql,_sql_dynamic, ' FROM trservices tr
LEFT JOIN libproblems lp on tr.ProblemID=lp.ID
GROUP BY lp.Problem WITH ROLLUP) a;');
SET @stmt_str = _sql;
PREPARE stmt FROM @stmt_str;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
SET _RecordCount =(SELECT COUNT(*) FROM Results);
SELECT * FROM Results
LIMIT _offset, _PageSize;
DROP TEMPORARY TABLE Results;
END
继承我输出的图像
