Question

我已经在sql server中编写了以下存储过程

CREATE PROCEDURE usp_getQuantityBilling()
--  VARIABLE --
DECLARE @cols AS NVARCHAR(MAX) 
DECLARE @query AS NVARCHAR(MAX)

select @cols = group_concat(name)
from visit_groups where arm_id='377';

set @query = 'SELECT id, service, rate, subjectcount, armDetailsId, totalHours,' 
         + @cols + ' FROM 
         (
            select protocols.id, arms.name, visit_groups.name as visitGroup, services.name as serviceName,  visits.quantity, 
            line_items_visits.subject_count
            from protocols,arms,visit_groups,visits,line_items,line_items_visits,services
            where protocols.id = arms.protocol_id
            and visit_groups.arm_id = arms.id
            and visits.visit_group_id = visit_groups.id
            and line_items_visits.arm_id = arms.id
            and visits.line_items_visit_id = line_items_visits.id
            and line_items_visits.line_item_id = line_items.id
            and services.id = line_items.service_id
            and protocols.id = ''' + 591 + '''

        ) x
        pivot 
        (
            max(isActive)
            for visitName in (' + @cols + ')
        ) p';

execute (@query)

我正在尝试将其转换为mysql服务器，但是我不确定如何在mysql存储的proc中声明变量，以及如何一起运行所有这些查询，以便将上一个查询生成的结果用于下一个查询。

也在下面的查询中：

select @cols = group_concat(name) 
from visit_groups where arm_id='377';

出现错误

错误代码：1267。非法的排序规则混合（utf8_general_ci，IMPLICIT）和（utf8_unicode_ci，IMPLICIT）执行操作'='0.000秒

所以我寻找了解决方案，并像这样

select @cols = group_concat(name) COLLATE utf8_unicode_ci from visit_groups 
where arm_id='377';

现在我得到的结果是列名为@cols = group_concat(name) COLLATE utf8_unicode_ci的0，但是结果实际上应该看起来像visit1，visit 2，因为那是我在sql server中得到的。

修改

  SELECT id, name, visitGroup, serviceName, quantity, subject_count,' 
         + [Visit 1],[Visit 2] + ' FROM 
         (
            select protocols.id, arms.name, visit_groups.name as visitGroup, services.name as serviceName, 
            visits.quantity, 
            line_items_visits.subject_count
            from protocols,arms,visit_groups,visits,line_items,line_items_visits,services
            where protocols.id = arms.protocol_id
            and visit_groups.arm_id = arms.id
            and visits.visit_group_id = visit_groups.id
            and line_items_visits.arm_id = arms.id
            and visits.line_items_visit_id = line_items_visits.id
            and line_items_visits.line_item_id = line_items.id
            and services.id = line_items.service_id
            and protocols.id = ''' + 591 + '''

        ) x
        pivot 
        (
            max(isActive)
            for visitName in (' + [Visit 1],[Visit 2] + ')
        ) p'

主要问题是运行此查询，它显示mysql错误，在错误的位置使用了数据透视，但是在sql中工作正常。无论如何要将这个查询转换成mysql数据透视查询。

注意：此访问1和访问2是动态生成的，但仅为了此解决方案，我手动将其复制到此处。

将动态SQL Server Pivot转换为MySQL

0 个答案: