mysql 存儲過程中使用變量（like 模糊查詢）

set @sql = concat("....");

PREPARE sql_real FROM @sql;
EXECUTE sql_real;
deallocate prepare sql_real;

主要是通過concat拼接SQL，然後通過prepare,execute執行SQL；

 

CREATE DEFINER=`root`@`%` PROCEDURE `get_saled_list`(v_keywords varchar(50))
BEGIN
declare v_list LONGTEXT;
declare v_list2 LONGTEXT;
declare v_result LONGTEXT;
declare v_where varchar(200);

select concat('concat(c.name,d.customer_name) like \'%',v_keywords,'%\'') into v_where ;
set @v_where=v_where;

DROP TABLE IF EXISTS xxx;

set @sql = concat("create table xxx as 
SELECT ... ",@v_where,"AND ...");

PREPARE sql_real FROM @sql;
EXECUTE sql_real;
deallocate prepare sql_real;

SELECT GROUP_CONCAT(LEFT(col,LENGTH(col)-1)) into  v_list from ( 
        SELECT CONCAT('SUM(IF(po_no=\'',po_no,'\'',',received_qty,0)) AS ',po_no,',') col
    FROM (SELECT DISTINCT po_no FROM xxx) A
) b limit 1 ;

SELECT GROUP_CONCAT(LEFT(col,LENGTH(col)-1)) into  v_list2 from ( 
        SELECT CONCAT('SUM(IF(po_no=\'',po_no,'\'',',saled_qty,0)) AS ',po_no,',') col
    FROM (SELECT DISTINCT po_no FROM xxx) A
) b limit 1 ;

SET @result=CONCAT('SELECT customer_id,customer_name,goods_id,name,sum(received_qty) received_qty,',LEFT(v_list,LENGTH(v_list)-1),
',sum(saled_qty) saled_qty,',LEFT(v_list2,LENGTH(v_list2)-1),' FROM xxx GROUP BY goods_id');

-- select @result;

prepare stmt from @result; 
execute stmt ; 
deallocate prepare stmt;

END