sql - 将单列拆分为多列

Question

我的表如下所示：

id    customer_code   comments
-----------------------------------
1       Dilbert        true
2       Dilbert        false
3       Wally          true
4       wally          true
5       wally          false

我需要的结果是这样的：

id  customer_code  x1     x2
------------------------------
1   Dilbert        ture
2   Dilbert               false
3   wally          ture
4   wally          ture
5   wally                 false         

Answer 1

SELECT [id], [customer_code],
CASE [comments] WHEN 'TRUE' THEN 'TRUE' ELSE NULL END AS X1,
CASE [comments] WHEN 'FALSE' THEN 'FALSE' ELSE NULL END AS X2
FROM Table1;

小提琴