Sql语句实现行转列
转换成如下表格
备注：类型两列是唯一行，产品只有ABCD四个值
select '2018' NF,listagg(''''||CP||' '''||LX,',') WITHIN GROUP(ORDER BY LX) FROM TAB1;
解释：把LX列和CP列拼接成：'CP' AS LX ,再利用listagg()函数转换成一个字符串使用
上面SQL为了节省拼接空间，省略了AS
过程如下：
1.拼接如下：
2.用listagg()函数转换成一个字符串，如下
‘A’ AS T1,'C' AS T2,‘B’ AS T3,'D' AS T4,‘D’ AS T5,'C' AS T6,‘D’ AS T7,'A' AS T8,‘B’ AS T9,'C' AS T10
3.SQL查询相当于：
select '2018' NF,listagg(''''||CP||''''||‘ AS '||LX,',') WITHIN GROUP(ORDER BY LX) FROM TAB1;
相当于：
select '2018' NF, ‘A’ AS T1,'C' AS T2,‘B’ AS T3,'D' AS T4,‘D’ AS T5,'C' AS T6,‘D’ AS T7,'A' AS T8,‘B’ AS T9,'C' AS T10 FROM TAB1;
————欢迎大家沟通、指正---- QQ群：1071136320————