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mysql 动态sql的拼接以及执行、分页

时间:2019-02-22 12:42:08      阅读:439      评论:0      收藏:0      [点我收藏+]

标签:localhost   var   ini   结果   sql语句   mysql   create   tsql   打印   

1:简历存储过程,标记参数:

CREATE DEFINER=`root`@`localhost` PROCEDURE `pos_get_drugInList`(IN page integer,IN limitz integer,IN drugCodez VARCHAR(50),IN effectDatez VARCHAR(50),IN chainIdz VARCHAR(19))
BEGIN
DECLARE start integer;
set start = (page-1)*limitz;
set @sql = select * from dsos_vot_drugrecord where 1 = 1;

    #获取药品信息(最多一千条)

    if drugCodez <> ‘‘ then 
      set @sql = CONCAT(@sql, and drugCode= ,drugCodez);
    end if;
    
    if effectDatez <> ‘‘ then 
      set @sql = CONCAT(@sql,‘ and effectDate= ‘,‘‘‘‘,effectDatez,‘‘‘‘);end if;
    
    if chainIdz <> ‘‘ then 
      set @sql = CONCAT(@sql, and chainId= ,chainIdz);
    end if;
    set @sql = CONCAT(@sql, limit ,start,, ,limitz);
    
--     PREPARE distSQL FROM @SQL ;
--     EXECUTE distSQL;
--     DEALLOCATE PREPARE distSQL ;    
select @sql;
END

2:先打印出sql字符串,判断是否是理想值:

技术图片

3:干掉注释,执行sql语句,看结果:

CREATE DEFINER=`root`@`localhost` PROCEDURE `pos_get_drugInList`(IN page integer,IN limitz integer,IN drugCodez VARCHAR(50),IN effectDatez VARCHAR(50),IN chainIdz VARCHAR(19))
BEGINDECLARE start integer;
set start = (page-1)*limitz;
set @sql = select * from dsos_vot_drugrecord where 1 = 1;

    #获取药品信息(最多一千条)

    if drugCodez <> ‘‘ then 
      set @sql = CONCAT(@sql, and drugCode= ,drugCodez);
    end if;
    
    if effectDatez <> ‘‘ then 
      set @sql = CONCAT(@sql,‘ and effectDate= ‘,‘‘‘‘,effectDatez,‘‘‘‘);end if;
    
    if chainIdz <> ‘‘ then 
      set @sql = CONCAT(@sql, and chainId= ,chainIdz);
    end if;
    set @sql = CONCAT(@sql, limit ,start,, ,limitz);
    
     PREPARE distSQL FROM @SQL ;
     EXECUTE distSQL;
     DEALLOCATE PREPARE distSQL ;    
#select @sql;
END

4:结果:

技术图片

 谢的不好,多多包涵,喜欢的朋友点个赞那啊~(????)?"""

mysql 动态sql的拼接以及执行、分页

标签:localhost   var   ini   结果   sql语句   mysql   create   tsql   打印   

原文地址:https://www.cnblogs.com/zgq7/p/10417340.html

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