通过 postgresql 中的其他列值更新列值

Question

我有什么

id  s_1     s_2      s_3      s_4     s_5     s_6     s_7      s_8

 ax    1      0         0       0       0        0       0       0
 bx    0      1         0       0       0        0       0       0
 cx    0      0         1       0       0        0       0       0
 dx    0      0         0       1       0        0       0       0
 ex    0      0         0       0       1        0       0       0
 fx    0      0         0       0       0        1       0       0
 gx    0      0         0       0       0        0       1       0
 hx    0      0         0       0       0        0       0       1

我正在尝试更新我的列值，如下所示。

如果我有 1,0,0,0,0,0,0,0，作为从 s1 到 s8 的列值，那么它应该更新为 1,0,1,0,1,0,1,0

如果我有 0,1,0,0,0,0,0,0 作为从 s1 到 s8 的列值，那么它应该更新为 0,1,1,0,1,0,1,0

如果我有 0,0,1,0,0,0,0,0 作为从 s1 到 s8 的列值，那么它应该更新为 0,0,1,0,1,0,1,0

如果我有 0,0,0,1,0,0,0,0 作为从 s1 到 s8 的列值，那么它应该更新为 0,0,0,1,1,0,1,0

如果我有 0,0,0,0,1,0,0,0，作为从 s1 到 s8 的列值，那么它应该更新为 0,0,0,0,1,0,1,0

如果我有 0,0,0,0,0,1,0,0 作为从 s1 到 s8 的列值，那么它应该更新为 0,0,0,0,1,1,1,0

如果我有 0,0,0,0,0,0,1,0，作为从 s1 到 s8 的列值，那么它应该更新为 0,0,0,0,0,0,1,0

如果我有 0,0,0,0,0,0,0,1 作为从 s1 到 s8 的列值，那么它应该更新为 0,0,0,0,0,0,0,1

输出如下所示

 id  s_1     s_2      s_3      s_4     s_5     s_6     s_7      s_8

 ax    1      0         1       0       1        0       1       0
 bx    0      1         1       0       1        0       1       0
 cx    0      0         1       0       1        0       1       0
 dx    0      0         0       1       1        0       1       0
 ex    0      0         0       0       1        0       1       0
 fx    0      0         0       0       1        1       1       0
 gx    0      0         0       0       0        0       1       0
 hx    0      0         0       0       0        0       0       1

Answer 1

UPDATE table_name AS o
   SET (s_1, s_2, s_3, s_4, s_5, s_6, s_7, s_8) = (n_1, n_2, n_3, n_4, n_5, n_6, n_7, n_8) 
  FROM (
       VALUES 
         (1,0,0,0,0,0,0,0, 1,0,1,0,1,0,1,0),
         (0,1,0,0,0,0,0,0, 0,1,1,0,1,0,1,0), 
         (0,0,1,0,0,0,0,0, 0,0,1,0,1,0,1,0), 
         (0,0,0,1,0,0,0,0, 0,0,0,1,1,0,1,0), 
         (0,0,0,0,1,0,0,0, 0,0,0,0,1,0,1,0),
         (0,0,0,0,0,1,0,0, 0,0,0,0,1,1,1,0),
         (0,0,0,0,0,0,1,0, 0,0,0,0,0,0,1,0),
         (0,0,0,0,0,0,0,1, 0,0,0,0,0,0,0,1)
       ) as n (
         s_1, s_2, s_3, s_4, s_5, s_6, s_7, s_8,
         n_1, n_2, n_3, n_4, n_5, n_6, n_7, n_8
       ) 
 WHERE (o.s_1, o.s_2, o.s_3, o.s_4, o.s_5, o.s_6, o.s_7, o.s_8) = (n.s_1, n.s_2, n.s_3, n.s_4, n.s_5, n.s_6, n.s_7, n.s_8)

Answer 2

我确信有一个单一的 SQL 更新解决方案，但下面的多语句更容易编写（和调试）：

update my_table -- case 1: 1,0,0,0,0,0,0,0
  set s1 = 1, s2 = 0, s3 = 1, s4 = 0, s5 = 1, s6 = 0, s7 = 1, s8 = 0
  where s1 = 1 and s2 = 0 and s3 = 0 and s4 = 0 
    and s5 = 0 and s6 = 0 and s7 = 0 and s8 = 0;

那么，对于案例 2：

update my_table -- case 2: 0,1,0,0,0,0,0,0
  set s1 = 0, s2 = 1, s3 = 1, s4 = 0, s5 = 1, s6 = 0, s7 = 1, s8 = 0
  where s1 = 0 and s2 = 1 and s3 = 0 and s4 = 0 
    and s5 = 0 and s6 = 0 and s7 = 0 and s8 = 0;

您可以编写其余的情况（3、4、5、6、7 和 8）。