sql 如何动态多行转多列
最新回答
╭⌒浅痛
2022-03-22 12:32:12
方法如下：
1、先查询出表里面的列名称
2、行列转换
举例
1、查询student字段名
SELECT
a.colorder as _colOrder, --字段序号
a.name as _colName --字段名
FROM syscolumns a left join systypes b
on a.xtype=b.xusertype
inner join sysobjects d
on a.id=d.id and d.xtype='U' and d.name<> 'dtproperties'
left join syscomments e
on a.cdefault=e.id
left join sys.extended_properties g
on a.id=g.major_id AND a.colid = g.minor_id
where d.name='student' --所要查询的表
order by a.id,a.colorder
2、行列转换
SELECT
MAX (CASE WHEN SetupID = 1 THEN SetupName ELSE NULL END ) AS [1],
MAX (CASE WHEN SetupID = 2 THEN SetupName ELSE NULL END ) AS [2],
MAX (CASE WHEN SetupID = 3 THEN SetupName ELSE NULL END ) AS [3],
MAX (CASE WHEN SetupID = 4 THEN SetupName ELSE NULL END ) AS [4]
......
FROM table
洛小汐
2021-03-21 15:47:35
热带的企鹅
2022-02-15 08:35:56
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