Question

我的表格结构如下

if (typeof importClass != "function") 
{
  load("nashorn:mozilla_compat.js");
}

我需要输出为

name   type  total
name1  type1  10
name1  type1  10
name1  type2  20
name1  type3  30
name2  type1  30
name2  type2  40
name2  type3  50
name2  type4  25

如何使用php和mysql实现此目的。谁能帮我解决这个问题

注意：这里的type1，type2 ..是动态名称，不能为硬编码

Answer 1

Try:

select name, if(type='type1', sum(type),0) as type1, 
if(type='type2', sum(type),0) as type2 .................... from table_name group by name

Answer 2

您可以在下面尝试-

SET @sql = NULL;
        SELECT
          GROUP_CONCAT(DISTINCT
            CONCAT(
              'MAX(IF(type = ''',
              type,
              ''', total, NULL)) AS ',
              type
            )
          ) INTO @sql
        FROM order_products_sizes;

        SET @sql = CONCAT('SELECT name, ', @sql, ' 
                           FROM tablename group by name');

        PREPARE stmt FROM @sql;
        EXECUTE stmt;
        DEALLOCATE PREPARE stmt;

需要基于php中列值的具有分组值的mysql数据

2 个答案: